Journal articles: 'Polluted waters'

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Yang, Dongfang, Haixia Li, Dong Lin, Yuan Zhang, and Qi Wang. "The reduction process of petroleum content in marine oil spill in Jiaozhou Bay." E3S Web of Conferences 252 (2021): 03013. http://dx.doi.org/10.1051/e3sconf/202125203013.

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According to the survey data about the waters of Jiaozhou Bay in May, September, and October 1993, this paper studies the content of PHC and its horizontal distribution in the surface waters of Jiaozhou Bay. The result shows that the range of PHC content in the waters of Jiaozhou bay is 4.16–51.00μg/L, which conforms to the national first, second and third water quality standards. In terms of PHC content, the water quality of Jiaozhou Bay is slightly polluted by PHC content in May, September and October. In May, the range of PHC content in the water of Jiaozhou Bay is 4.16–51.00μg/L, which is slightly polluted by PHC content. In the center of east waters, the water quality is slightly polluted by PHC content and the range of PHC content in other water fields of Jiaozhou Bay is 4.16–48.40μg/L which indicates that the water quality is not polluted by PHC content. In September, the range of PHC content in the waters of Jiaozhou Bay is 6.17–12.70μg/L, which is not polluted by PHC content. In October, the range of PHC content is 11.40–11.80μg/L, indicating that the waters of Jiaozhou Bay are not polluted by PHC. The content of PHC in the waters of Jiaozhou Bay only has one source, the transportation of marine oil spill, and the PHC content transported is 12.70–51.00μg/L. Therefore, as time changes, the ocean polluted by PHC content resulting from marine oil spill has gradually reduced over the course of the year. The marine oil spill has caused the waters in May to be slightly polluted by the PHC content. By September, the waters are not polluted by the PHC content. And then, in October, the marine oil spill has disappeared.

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Tobler, M., and Z. W. Culumber. "Swimming in polluted waters." Science 354, no. 6317 (December 8, 2016): 1232–33. http://dx.doi.org/10.1126/science.aal3211.

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Imziln, Boujamaa. "Occurrence and Antibiotic Resistance of Mesophilic Aeromonas in Three Riverine Freshwaters of Marrakech, Morocco." Scientific World JOURNAL 1 (2001): 796–807. http://dx.doi.org/10.1100/tsw.2001.284.

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I n order to evaluate the impact of pollution and sewage on the occurrence and antibiotic resistance of mesophilic aeromonads in riverine freshwaters of Marrakech, samples were collected from three rivers (Oukaimeden, Ourika, and Tensift) upstream and downstream from the principal bordering villages. During a 2-year study, indicators of pollution increased dramatically in the downstream waters. Bacterial indicators (faecal coliforms and faecal streptococci) correlated with mesophilic aeromonads only in heavily polluted waters. In low and moderately polluted sources, densities of mesophilic aeromonads were independent of water quality indicators and did not correlate statistically with faecal indicators. Average counts of Aeromonas in low and heavily polluted waters were 2.5 × 103 and 2.1 × 106 colony forming units per 100 ml, respectively. The biochemical identification of 841 isolates indicated a predominance of A. caviae in heavily and moderately polluted water and sediment. A. hydrophila was dominant only in low polluted waters and when the temperature was below 12°C. High densities of A. sobria were found in low, moderately polluted, or cleaned waters and when the water temperature was above 18°C. All selected isolates (total = 841) were tested for antibiotic susceptibility against 21 antibiotics. Antibiotic resistance frequencies recorded were: ampicillin and amoxicillin, 100%; novobiocin, 96%; cefalotin, 81%; colistin, 72%; sulfamethoxazole, 40%; cefamandole, 37%; polymyxin B, 23%; trimethoprim, 17%; erythromycin, 15%; streptomycin, 8%; amoxicillin-clavulanate, 5%. Resistance to cefotaxime, kanamycin, gentamycin, chloramphenicol, tetracycline, oxytetracycline, nalidixic acid, rifampicin, or trimethoprim-sulfamethoxazole was found to be <5%. Antibiotic resistance rates did vary according to the source of a strain’s isolation, and high numbers of antibiotic resistant strains were recorded in polluted samples. Since no correlation between mesophilic aeromonads and conventional faecal pollution indicators was observed in low or moderately polluted waters, and since these freshwaters are used for domestic supply, we propose the use of mesophilic aeromonads as complementary water pollution indicators to ensure the safety of water.

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Juuti, Petri S., and Tapio S. Katko. "From Polluted to Swimmable Waters." Water International 24, no. 3 (September 1999): 204–10. http://dx.doi.org/10.1080/02508069908692163.

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Yang, Dongfang, Haixia Li, Dong Lin, Yuan Zhang, and Dongmei Jing. "Gradually increasing Petroleum content in Jiaozhou Bay waters." E3S Web of Conferences 136 (2019): 06014. http://dx.doi.org/10.1051/e3sconf/201913606014.

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Based on the survey data of Jiaozhou Bay in May, August and October 1992, this paper studied PHC content in Jiaozhou Bay and its horizontal distribution in the surface layer. The results showed that PHC content in the waterbodyof Jiaozhou Bay in May, August and October ranged from 0.006mg/L to 0.075mg/L, which met the first-class, secondand thirdseawater quality standard in China. This fact indicatedthat the waters of Jiaozhou Bay were slightly polluted by PHCduring this period. In May, PHC content in the waterbody of Jiaozhou Bay ranged from 0.006mg/L to 0.070mg/L, showingthat itwasslightly polluted by PHC.The PHC content in the coastalwater at the entrance of Haibo River was 0.070mg/L, beingslightly polluted; The PHCcontent in the other waters of Jiaozhou Bay ranged from 0.006mg/L to 0.042mg/L, not polluted. In August, PHC content in the waterbody of Jiaozhou Bay ranged from 0.019mg/L to 0.056mg/L, slightly polluted by PHC. The PHC content in the central water of theeastern bay was 0.056mg/L, slightly polluted; The PHC content in the other waters of Jiaozhou Bay ranged from 0.019mg/L to 0.048mg/L, not polluted. In October, PHC content in the waterbody of Jiaozhou Bay ranged from 0.028mg/L to 0.075mg/L, showing that it wasslightly polluted by PHC. The PHC content in the coastalwaters at the entrance of Loushan River and Licun River ranged from 0.055mg/L to 0.075mg/L,slightly polluted; The other waters inside Jiaozhou Bay were not polluted. The PHC content in the water at the bay mouthof Jiaozhou Bay was 0.054mg/L, slightly polluted. There were three main sources of PHC in the waters of Jiaozhou Bay, namely oil spill transportation at sea, open sea current transportation and river flow transportation. The PHC content transported through oil spill ranged from 0.042mg/L to 0.056mg/L, that transported through open sea current was 0.054 mg/L, and that transported through river flow ranged from 0.046mg/L to 0.075mg/L. Among them, the PHC content transported through river flow from Loushan River was 0.075mg/L, that from Haibo River was 0.070mg/L, andthat from Dagu River was 0.046mg/L. The PHC content transported through oil spills at sea, open sea currents and river flows caused slight pollution. Therefore, from May to August and then to October, the continuous transportation of much PHC content into the waters of Jiaozhou Bay kept elevating the low level of PHC contentin the waters of Jiaozhou Bay.

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Suhardono, Sapta, Iva Yenis Septiariva, Mega Mutiara Sari, and I. Wayan Koko Suryawan. "Analysis of metal pollution index in waters in the central Java area, Indonesia." AQUATIC SCIENCE & MANAGEMENT 10, no. 2 (October 27, 2022): 35. http://dx.doi.org/10.35800/jasm.v10i2.40974.

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Central Java is one of the regions in Indonesia with a lot of water resources that must be appropriately managed. In addition, metal content in water bodies in Central Java must now be assessed to prevent health impacts that may be measurable. One of the methods to analyze the management of water bodies is the water quality index method. This study aimed to examine the water quality index due to metal contamination in water bodies in Central Java. Metal measurements were carried out using the AAS (Atomic Absorption Spectrophotometry) method. The value of the water quality index using the water quality index method for waters in Central Java in 2015-2018 was categorized to mild to moderately polluted, and only 2 locations were measured as heavily polluted. Two areas that are included in the heavily polluted category were the waters of Bulakan and Bojonegoro in 2016. To determine the cause of why the water quality index value being classified as moderately polluted and lightly polluted, we must look at the metal parameters that contribute the most to the index value. These parameters can be initial information on the pollutant source that causes pollution.

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Yang, Dongfang, Xiaoju Zhang, and Sivakumar Manickam. "Study on the Track and Degree of Pb Content Transportation." E3S Web of Conferences 406 (2023): 02023. http://dx.doi.org/10.1051/e3sconf/202340602023.

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Heavy Pb pollution has been noted in many developed countries. This study examined Pb pollution in Jiaozhou Bay for human security. We used the survey data on the Jiaozhou Bay waters of May, September and October 1994, the results examines Pb content and its horizontal distribution in the surface water bodies, which showed that the in the waters of Jiaozhou Bay Pb content expresses the range of 0.12-2.48 μg/L, agreeing with the seawater standards of Class I and II. Moreover, it has been noted that by the view of Pb content, Pb content in May, September and October polluted the Jiaozhou Bay water bodies softly. In May, September and October, the Pb content in the waters of Jiaozhou Bay ranged from 0.12 to 1μg/L, 0.84 to 1.34 μg/L, and 0.92 to 2.48 μg/L. These results show that Pb content in May did not pollute the Jiaozhou Bay water bodies. While Pb content during September and October slightly polluted. Three sources transported mainly Pb content into Jiaozhou bay. These sources are rivers, land surface runoff and offshore ocean currents. The rivers transported the Pb content 0.47-2.48 μg/L, the land surface runoff 2μg/L and the offshore ocean currents 1.34 μg/L. It demonstrates that Pb slightly polluted rivers, land surface runoff and offshore ocean currents in the transportation of Pb. From May to October, rivers transported Pb content which varied significantly. In September, land surface runoff transported Pb content during the rainy season. In addition, the offshore currents also transported Pb content to the waters of Jiaozhou Bay. Human activities discharged Pb content to land and transported it to the ocean, relying on the land surface runoff and rivers. Thus, two channels were transporting Pb content on land to the ocean, increasing Pb content. Through ocean currents, Pb content was transported from the high-content water area to the low-content water area. Therefore, the Pb content transported by rivers and land surface runoff could raise concerns from humans.

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Gayrat, Urazalievich Urazboev, Abdykarim Baymankulov, and Anvar Aknazarovich Reyimberganov. "PLANE WAVES ON SHALLOW POLLUTED WATERS." 3i: intellect, idea, innovation - интеллект, идея, инновация, no. 2 (2021): 54–59. http://dx.doi.org/10.52269/22266070_2021_2_54.

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Gayrat, Urazalievich Urazboev, Abdykarim Baymankulov, and Anvar Aknazarovich Reyimberganov. "PLANE WAVES ON SHALLOW POLLUTED WATERS." 3i: intellect, idea, innovation - интеллект, идея, инновация, no. 2 (2021): 54–59. http://dx.doi.org/10.54351/22266070_2021_2_54.

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Meenakshi, M. "Bioremediation Of Polluted Waters Using Nanoparticles." Journal of University of Shanghai for Science and Technology 24, no. 1 (January 4, 2022): 1–33. http://dx.doi.org/10.51201/jusst/21/121063.

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Water pollution is an issue of great concern worldwide, contamination by organic compounds, inorganic compounds and microorganisms. Bioremediation using microorganisms helps in the removal of toxic metals from the environment. The focus is on the heavy metals associated with environmental contamination, lead (Pb), cadmium (Cd), and chromium (Cr) which are potentially hazardous to ecosystems. In the present study textile effluent was collected, and subjected to Physicochemical treatment methods , Herbal-Metal nanocomposite was prepared and used to treat textile effluents. As a bioremediation study, the plant growth potential of treated effluents was evaluated using pot studies of an aquatic plant .Laboratory and field test results confirmed superior bioremediation efficiency and long-term effect. When compared to today’s most-efficient bioremediation technologies there is an efficient, fast, safe, and inexpensive way to clean up polluted waters through acceleration of natural bioremediation process. Nanotechnology provides an economical, convenient and ecofriendly means of wastewater remediation. The results obtained in this study shall be carried out as future studies using different types and concentrations of nanoparticles for the treatment of any types of effluents causing land and water pollution. There is a growing need for the development of novel, efficient, eco-friendly, and cost-effective approach for the remediation of inorganic metals released into the environment and to safeguard the ecosystem. In this regard, recent advances in microbes-base heavy metal have propelled bioremediation as a prospective alternative to conventional techniques.

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ALVAREZ-VÁZQUEZ, L. J., A. MARTÍNEZ, R. MUÑOZ-SOLA, C. RODRÍGUEZ, and M. E. VÁZQUEZ-MÉNDEZ. "THE WATER CONVEYANCE PROBLEM: OPTIMAL PURIFICATION OF POLLUTED WATERS." Mathematical Models and Methods in Applied Sciences 15, no. 09 (September 2005): 1393–416. http://dx.doi.org/10.1142/s0218202505000790.

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In this work we deal with the optimal purification of polluted areas of shallow waters by means of the injection of clear water in order to promote seawater exchange. This problem can be formulated as a control constrained optimal control problem where the control is the velocity of the injected water, the state equations are the shallow water equations together with that modelling the contaminant concentration, and the cost function measures the total amount of injected water and the fulfilment of the water quality standards. We analyze the solutions of the optimal control problem and give an optimality condition in order to characterize them. We also discretize the problem by means of a characteristics-mixed finite element method, focusing our attention on both the discrete and the discretized adjoint systems, and propose an algorithm for the numerical resolution of the discrete optimization problem. Finally, we present numerical results for some computational experiments.

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Pérez, Johan Hernán, Zulma Edelmira Rocha Gil, Gabriel Ricardo Cifuentes Osorio, Claudia Constanza Pérez Rubiano, and Dumar Ariel Parrales Ramírez. "Physicochemical and Biological Structure as Indicators of the Environmental Quality of Surface Water Streams." Boletín Científico Centro de Museos Museo de Historia Natural 27, no. 1 (January 1, 2023): 55–70. http://dx.doi.org/10.17151/bccm.2023.27.1.3.

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The lower basin of the Cusiana River is an area affected by various socioeconomic activities. This study aims to establish the physicochemical and biological structure of areas influenced by agriculture, livestock, and wastewater discharges from urban areas. Sampling was conducted at two locations, the municipality of Aguazul and the municipality of Maní in the Casanare department, Colombia. Four monitoring surveys were carried out considering seasonal differences in rainfall and drought. The variables analyzed were: temperature, alkalinity, conductivity, turbidity, BOD, COD, total hardness, total phosphorus, nitrates, dissolved oxygen, pH, suspended solids and sampling of benthic macroinvertebrate communities. To assess water quality in the sampled periods, physicochemical indicators ICA NSF were estimated, considering the intended uses of the water resource, and reporting average quality. A total of 1491 individuals were reported, distributed across seven orders and 20 families. The BMWP/Col index was calculated for the two monitoring stations. The Aguazul station showed doubtful water, categorized as slightly polluted waters, which decreased significantly to moderately polluted waters. The Maní Station transitioned from dubious to critical condition and from moderately polluted to very polluted waters. Studies of this nature allow entities to make informed decisions regarding the proper using and management of the region’s water systems.

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Gemilang, Wisnu Arya, and Gunardi Kusumah. "STATUS INDEKS PENCEMARAN PERAIRAN KAWASAN MANGROVE BERDASARKAN PENILAIAN FISIKA-KIMIA DI PESISIR KECAMATAN BREBES JAWA TENGAH." EnviroScienteae 13, no. 2 (September 11, 2017): 171. http://dx.doi.org/10.20527/es.v13i2.3919.

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Settlement growth and activity of the population in the Brebes Subdistrict upstream side is also predicted to trigger intrusion and rising sea levels that affect the flow and availability of fresh water needed for the survival of life mangrove vegetation, especially in the adult stage. Therefore, identification of the quality of waters in the mangrove areas is needed to determine the status of these waters pollution index. Measurement of physical and chemical parameters of waters in situ using a Water Quality Checker (DKK TOA WQC Type-24) and laboratory testing of some samples to determine the nutrient content of the water is also performed. Insitu value measurement results later are calculated by using a pollution index refers to the Decree of the State Minister of Environment Number 51 The year 2004 on Guidelines for Determination of Water Quality Status. Index of water pollution Brebes District mangrove area is divided into three criteria: pollution index good condition, lightly polluted and heavily polluted. The section near the front mangrove estuary and enter the index criteria lightly polluted.

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Chusov, Alexandr N., Ekaterina A. Bondarenko, and Maria Ju Andrianova. "Study of Electric Conductivity of Urban Stream Water Polluted with Municipal Effluents." Applied Mechanics and Materials 641-642 (September 2014): 1172–75. http://dx.doi.org/10.4028/www.scientific.net/amm.641-642.1172.

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Specific electric conductivity of water samples in a polluted urban stream was compared with other water quality parameters such as concentration of inorganic carbon, total organic carbon, and total nitrogen. Increasing of water conductivity 1.3...10 times was observed downstream canalization outlets discharging drainage waters together with residential waste waters from inhabited district of city. In some periods water conductivity showed good correlation with pollutants concentration such as TN and IC (with correlation coefficients 0.54...0.96). The received data show that electric conductivity can be used for revealing waste waters pollution in fresh surface waters.

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Lino de Araujo, A., A. Konig, and B. S. O. Ceballos. "Soil and water changes after sewage irrigation practice in semi-arid region of Northeast Brazil." Water Supply 3, no. 3 (June 1, 2003): 133–39. http://dx.doi.org/10.2166/ws.2003.0018.

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Due to scarcity and uneven water distribution in many regions of the world, irrigation practices are carried using water with poor chemical and microbiological quality favouring salt accumulation in soil, groundwater contamination and health risks. These impacts can be easily evaluated with small soil columns, considered an equivalent experimental plots, given sufficient information for reuse practice such as plant water needs, water losses by evaporation and percolation, groundwater quality, culture productivity and microbiological contamination of soil and culture. This work describes chemical and microbiological changes in two soils of Paraíba State - Northeast Brazil, before and after irrigation with clean water and polluted superficial water. Also investigated are the changes in water quality before and after percolating these soil columns and lettuce (Lactuca sativa, L.) contamination. The analysed parameters in water were: pH, electrical conductivity, ions (calcium, magnesium, potassium, chloride and sodium), ammonia, total phosphorus, soluble orthophosphate, BOD, fecal coliforms (FC) and fecal streptococci (FS). The pH values for both irrigation waters were slightly neutral to alkaline. Electrical conductivity values were high in irrigation and percolating waters (up to 1,753 and 2,367 mmho/cm) due to waters and soil features, not affecting plant growth. The concentrations of calcium, magnesium, potassium were considered adequate for irrigation water but not for chloride and sodium, although indirect effects on lettuce growth were observed. The BOD5 of polluted water ranged from 8 to 15 mgO2/L and was reduced to 85% after the percolating soil columns. FCs in polluted water were well above the recommended WHO values of 1,000 CFU/100 mL with soils reducing these values in 99.8% for FC (2 × 106 - 4 × 103 CFU/100 mL) and 98% for FS (2.5 × 104 - 4 × 102 CFU/100 mL). Soils were highly contaminated with both FC (2.2 × 104 MPN/100 g) and E. coli (8.3 × 102 MPN/100 g) and when polluted water was used these numbers either increased or did not change. There was an increase of soil nitrogen and organic matter percentages after polluted water was added to the soils. Lettuces were also contaminated when both waters were used (with polluted water FC up to 2.0 × 105 MPN/100 g) and associated with aerosol formation during manual irrigation. Although some inconveniences are shown, water reuse must be considered as an alternative for food production in semi arid regions and will be successful when adequate and continuously technical support is given.

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Ahtiainen, Jukka, Maarit Niemi, and Hannele Jousimies-Somer. "Staphylococci in Polluted Waters and in Waters of Uninhabited Areas." Water Science and Technology 24, no. 2 (July 1, 1991): 103–8. http://dx.doi.org/10.2166/wst.1991.0037.

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The aim was to study the occurrence of staphylococci in southern Finland using both the modified Vogel-Johnson (VJP) and the M-5LSMA media in the MF technique. The study involved brooks and small lakes in uninhabited areas and sparsely populated farming areas as well as effluents from sewage treatment plants. Fecal indicator bacteria were determined simultaneously in all these samples. Median colony counts on both of the staphylococcal media in 100 mL samples were 1 to 2 for uninhabited areas, 60 to 110 for agricultural areas and 1000 to 1600 for treated wastewater. The maximum values were much higher in all the environments. The M-5LSMA recovered at least as many staphylococci as the VJP medium, but was more selective. Strains isolated from pristine waters and from wastewater were identified with the API 20 Staph kit. Six different species of staphylococci were recovered on the VJP medium and ten on the M-5LSMA medium. About one third of the isolates could not be identified to species level. Only 2% of the isolates from wastewater were Staphylococcus aureus whereas 18 % of the isolates from uninhabited areas belonged to this species. The identification was confirmed with the coagulase and DNAse tests.

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Narkis, N., and A. Katz-Stoller. "Back to pre-disinfection of highly polluted waters." Water Supply 2, no. 3 (July 1, 2002): 219–26. http://dx.doi.org/10.2166/ws.2002.0106.

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The initial pre-disinfection was one of the stages that most contributed to the formation of a large number of halogenated disinfection by-products (DBPs). The threat and awareness to the formation of chlorine disinfection by-products, refrained from using pre-disinfection with chlorine in the treatment of contaminated raw waters, to be used as drinking water. The main purpose of this research was to study whether chlorine dioxide can be used for pre-disinfection in the treatment of highly polluted wastewaters and surface waters. Chlorine dioxide was found suitable, as a replacement for chlorine, for disinfection of water containing natural organic substances, effluents’ organic materials and ammonium ions, due to its advantages, and especially because it is an effective disinfectant for killing pathogenic microorganisms and destroying viruses. Chlorine dioxide does not form THMs and barely creates chloroorganic compounds. However, the main disadvantage of the chlorine dioxide is the creation of undesirable chlorite and chlorate ions, which are suspected of being toxic. This research showed that the undesirable chlorite ions can be removed completely by adding Fe+2, which reduces ClO2- to the harmless Cl-, and is oxidized to Fe+3, to form the ferric polyhydroxo complexes, that can be used as the flocculant, in the next flocculation step, for the achievement of safer drinking water.

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Bagley, Susan T. "Habitat Association of Klebsiella Species." Infection Control 6, no. 2 (February 1985): 52–58. http://dx.doi.org/10.1017/s0195941700062603.

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AbstractThe genus Klebsiella is seemingly ubiquitous in terms of its habitat associations. Klebsiella is a common opportunistic pathogen for humans and other animals, as well as being resident or transient flora (particularly in the gastrointestinal tract). Other habitats include sewage, drinking water, soils, surface waters, industrial effluents, and vegetation. Until recently, almost all these Klebsiella have been identified as one species, ie, K. pneumoniae. However, phenotypic and genotypic studies have shown that “K. pneumoniae” actually consists of at least four species, all with distinct characteristics and habitats. General habitat associations of Klebsiella species are as follows: K. pneumoniae—humans, animals, sewage, and polluted waters and soils; K. oxytoca—frequent association with most habitats; K. terrigena— unpolluted surface waters and soils, drinking water, and vegetation; K. planticola—sewage, polluted surface waters, soils, and vegetation; and K. ozaenae/K. rhinoscleromatis—infrequently detected (primarily with humans).

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Radomska, Marharyta, and Alina Husieva. "PHOTOCATALYTIC TREATMENT OF WATERS, POLLUTED WITH PHENOLS." Technogenic and Ecological Safety, no. 10(2/2021) (November 25, 2021): 3–9. http://dx.doi.org/10.52363/2522-1892.2021.2.1.

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The analysis of the environmental and human health threats imposed by phenols was conducted to show the need for further improvement of methods of their destruction. Being toxic in their initial composition and precursor to toxic metabolites in human body, phenols should be controlled in natural water and waste waters. They are listed as priority pollutants in most national regulation around the world and are the initial compounds for the formation of persistent organic pollutants in the environment, polluted with other active radicals. A variety of physical and chemical methods were offered for the destructive or non-destructive removal of phenols and their derivatives from water. The comparative study of possible methods, described in research papers, was conducted in terms of their efficiency and complexity to define benefits and drawbacks. The analysis showed the need for development of low energy consuming method, which needs minimal equipment and can be run under industrial condition for phenol contaminated wastewaters. Among the possible methods which meet the mentioned criteria photocatalytic destruction of phenols was showed to be perspective. A series of experiments was conducted using a range of water solution of phenol and different dosage of catalysts. The catalysts used in experiments were made of 6 modification of titanium oxide and bismuth ferrite. The initial and residual concentration of phenol was controlled by the means of high-performance liquid chromatography. The duration of the exposure and the type of light were other independent variables. The results of the whole sequence of experiments demonstrated higher efficiency of rutile under visible light and one hour of exposure. The tested photocatalytic system is simple and therefore technically and economically feasible.

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Salsabil, Muhammad Arif, Astri Rinanti, and Melati Ferianita Fachrul. "Analysis of water quality in Maninjau Lake, West Sumatera, Indonesia using phytoplankton." MATEC Web of Conferences 197 (2018): 13007. http://dx.doi.org/10.1051/matecconf/201819713007.

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This research aimed to analyze the water quality of Maninjau Lake (0°19'N 100°12'E, 0,317°S 100,2°E), West Sumatera, Indonesia by phytoplankton as bioindicator of water quality. The quality of water was determined by identified the phytoplankton. Analyzed phytoplankton as bioindicator with Diversity Index (H′), Evenness Index (E) and Dominance Index (D). The abundance of phytoplankton ranged 273-378 cell/liter, consists of three division which are Cyanophyta, Chrysophyta, and Chlorophyta. The average value of Diversity Index (H′) is 3.52 show that the waters classified as moderate, or indicating half-polluted waters. The average value of Evenness Index (E) is 0.92 indicating that the evenness of species is medium. The average value of Dominance Index (C) is 0.12, meaning there is not any phytoplankton dominance in the waters. Maninjau Lake is slightly polluted caused by organic and inorganic contaminants from many activities surrounding especially household and fish breeding activities. The research show that Maninjau Lake is in oligotrophic state or nutrient-deficient waters.

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de Vicente, A., J. C. Codina, and P. Romero. "Relationship between Pseudomonas aeruginosa and Bacterial Indicators in Polluted Natural Waters." Water Science and Technology 24, no. 2 (July 1, 1991): 121–24. http://dx.doi.org/10.2166/wst.1991.0041.

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The relationship between Pseudomonas aeruginosa and the faecal pollution index (total coliforms, faecal coliforms and faecal streptococci) in natural waters was established. Water samples were collected from several aquatic environments in Málaga (Spain). P. aeruginosa counts and isolation frequencies were clearly associated with the degree of faecal pollution of the studied water. The results confirmed that domestic sewage was the major source of P. aeruginosa in river and seawater, being isolated from sewage at concentrations about 105 cfu/100 ml. There was a close correlation between the P. aeruginosa concentration and the densities of the three faecal indicators in both river and marine waters. A significant correlation was not observed in waters with little faecal pollution because P. aeruginosa was only occasionally isolated from these waters and at very low densities. P. aeruginosa concentrations in sewage and polluted natural waters were generally 3-4 log lower than the TC densities and 2 log lower than FC and FS concentrations. TC, FC and FS could be considered adequate indicators of the presence and densities of P. aeruginosa in natural waters, especially TC in freshwaters and FS in seawater respectively, as these parameters showed the best correlations and the most parallel inactivation processes with P. aeruginosa in each environment.

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AXMETOV, Timur O., Vladimir D. NAZAROV, and Vladimir S. GORYACHEV. "PURIFICATION OF POLLUTED WATERS IN GEOCHEMICAL BARRIER." Urban construction and architecture 4, no. 4 (December 15, 2014): 48–54. http://dx.doi.org/10.17673/vestnik.2014.04.8.

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The description of model of a geochemical barrier with granular loading from the siliconized calcite for purifi cation of the polluted waters, characteristic for areas of oil production and ores of metals is given. High or extreme concentration of chlorides, sulfates, iron, manganese, copper, oil products, sulfi des, iodine acted as pollutants. Tables of decrease in concentration and extent of cleaning of the specifi ed pollutants are given at horizontal fi ltering through granular loading at various speeds of fi ltering in various sites of a geochemical barrier.

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Bhattacharya, A. "Remediation of Pesticide‐Polluted Waters Through Membranes." Separation & Purification Reviews 35, no. 1 (June 2006): 1–38. http://dx.doi.org/10.1080/15422110500536151.

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Mages, Margarete, Mihály Óvári, Wolf v. Tümpling, and Krisztina Kröpfl. "Biofilms as bio-indicator for polluted waters?" Analytical and Bioanalytical Chemistry 378, no. 4 (December 5, 2003): 1095–101. http://dx.doi.org/10.1007/s00216-003-2291-5.

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Satchanska, G., E. N. Pentcheva, R. Atanasova, V. Groudeva, R. Trifonova, and E. Golovinsky. "Microbial Diversity in Heavy-Metal Polluted Waters." Biotechnology & Biotechnological Equipment 19, no. 3 (January 2005): 61–67. http://dx.doi.org/10.1080/13102818.2005.10817228.

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Pane, Yunita, Fahmi Muhammad Ridwan, Zulkarnain Hassan, and Desi Sri Pasca Sari Sembiring. "Analysis of water pollution problem Belawan waters." IOP Conference Series: Earth and Environmental Science 1135, no. 1 (January 1, 2023): 012027. http://dx.doi.org/10.1088/1755-1315/1135/1/012027.

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Abstract Indoor This study was conducted to determine water pollution conditions and pollutants entering Belawan waters. Exploration research methods are carried out about water pollution in Belawan of Indonesia. Data on pollution in Belawan is categorized as polluted where the average level of lead-heavy metal in the body of blood clams in Belawan coastal waters reaches 0.042 ppm, the analysis results of Pb metal in Belawan waters in the Electric Steam Power Plant (PLTU) area (24, 12 ppm), mangroves (26.91), and the area around fishermen (11.18 ppm), all of which have passed the quality standard threshold. Water Quality Management and Water Pollution Control related to Pb Quality Standard based on the attachment of PP no 82 of 2001 is Pb < 0.1 mg/L. The content of COD and BOD in water was studied to describe the amount of organic matter dissolved in the water, in the study stated that COD and BOD are indicators to determine water quality. The physical and chemical conditions of Belawan waters are still in the feasible category, measured from Ph, BOD, and DO which are still within the proper limit, this is because the ecosystem and natural habitat are still in balance, then seen from the high diversity of macrozoobenthos, it can be said that polluted with medium-high categorized in Belawan waters.

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Putri, Yulisah Dwi, Elfi Yuliza, and Lizalidiawati Lizalidiawati. "Kajian Kualitas Air dan Indeks Pencemaran Di Perairan Kampung Sejahtera Pulau Baai Kota Bengkulu." Newton-Maxwell Journal of Physics 2, no. 2 (October 31, 2021): 45–53. http://dx.doi.org/10.33369/nmj.v2i2.17597.

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Water quality is one of the important factors supporting the growth of mangrove ecosystems. The activites of Kampung Sejahtera’s people were allegedly polluted the waters and disturbing the mangrove ecosystem. This study aimed to identify the status of water quality and pollution index in the waters of Kampung Sejahtera, Bengkulu City. The method used is a direct measurement at the research location which was carried out at 9 location points, 5 points representing the waters near the settlements of the prosperous village residents, and 4 location points representing the waters near the mangrove ecosystem. Then the results are compared with the Decree of the State Minister of the Environment No. 51 of 2004 concerning seawater quality standards for marine biota and to determine the status of water quality by using the pollution index method based on the Decree of the State Minister of the Environment No. 115 of 2003. The results of this study indicate that the temperature parameter, salinity, and pH met the quality standard while the TSS and DO parameters did not fulfill the quality standard. Based on the results of the calculation of the pollution index that the waters of Kampung Sejahtera are in the category of good condition to lightly pollute.

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Balushkina, E. V., and S. M. Golubkov. "Biodiversity of benthic animal communities and quality of waters in the Neva estuary under anthropogenic stress." Proceedings of the Zoological Institute RAS 319, no. 2 (June 25, 2015): 229–43. http://dx.doi.org/10.31610/trudyzin/2015.319.2.229.

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In the eastern part of the Gulf of Finland 129 in the Neva Bay 127 species and superspecies taxa of benthic animals were found. In total in 1994–2014 188 taxa of benthic animals were recorded in the estuary of the Neva River. Among these 68 are common for the Neva Bay and the eastern Gulf of Finland. At present zoobenthos communities in the estuary are dominated by eurybiont indicator species inhabiting “polluted” and “dirty” waters responding positively to an increase of organic pollution and eutrophication of the ecosystem and resistant to high concentrations of heavy metals and pollutants. Integrated mean assessment of water quality over the entire Neva Bay by means of (IP') (for the 1994–2014) remained relatively stable during the whole period, waters (except in 2006) were assessed as “polluted”. In the health-resort zone of the eastern Gulf of Finland IP' changed during the period of studies from 67.4 to 71.5% characterizing the quality of waters as “polluted-dirty”, which is one class lower than waters of the Neva Bay. As a result of pollution species diversity of benthic animals in the resort zone of the eastern Gulf of Finland is notably lower than in the Neva Bay.

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Ramadhania Putri Maresi, Sinta, Tri Edhi Budhi Soesilo, and Ami Aminah Meutia. "Water quality status of an urban lake in the dry season from 2017 to 2020 (Situ Gintung, Banten Province, Indonesia)." E3S Web of Conferences 211 (2020): 03008. http://dx.doi.org/10.1051/e3sconf/202021103008.

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Urban lakes are experiencing various kinds of problems because of the anthropocentrism of environmental management. This also happens in Situ Gintung, Indonesia. This lake is polluted by many pollutants from urban activities, such as the entry of domestic waste into waters due to anthropogenic activities and the amount of leftover food not consumed by fisheries. These problems can be solved by observing the water quality of Situ Gintung to provide information about parameters that have exceeded environmental quality standards and provide general information about the water quality in the dry season from 2017 to 2020. The research is done using a purposive sampling method and determining water quality status with the STORET method based on the Indonesian standard with parameters less than ten. As a result, Situ Gintung water is neither classified as class I, II, III, and IV nor be utilized for consumption, recreation, fisheries, and irrigation because the quality status is mostly in the heavily polluted category. Furthermore, the three highest polluters from each class are BOD5, COD, and a total of Coliform.

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Toyama, T., Y. Kainuma, S. Kikuchi, and K. Mori. "Biodegradation of bisphenol A and 4-alkylphenols by Novosphingobium sp. strain TYA-1 and its potential for treatment of polluted water." Water Science and Technology 66, no. 10 (November 1, 2012): 2202–8. http://dx.doi.org/10.2166/wst.2012.453.

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We investigated the use of Novosphingobium sp. strain TYA-1 for the simultaneous removal of bisphenol A (BPA) and 4-alkylphenols (4-APs) from complex polluted waters. Strain TYA-1 degraded BPA and utilized it as a sole carbon and energy source via oxidative skeletal rearrangement involving the cytochrome p450 monooxygenase system. Strain TYA-1 also degraded 4-APs with branched side alkyl chains (4-tert-butylphenol [4-tert-BP], 4-sec-butylphenol, 4-tert-pentylphenol, 4-tert-octylphenol [4-tert-OP], and branched nonylphenol mixture) via 4-alkylcatechols but could not degrade 4-APs with linear side alkyl chains. Degradation of 4-APs, like that of BPA, involved the cytochrome p450 monooxygenase system in strain TYA-1. A sequencing batch bioreactor (100 mL of polluted water [50 mg/L BPA, 50 mg/L 4-tert-BP, and 5 mg/L 4-tert-OP]; 6 h of reaction time/cycle; 12 cycles in total) containing alginate-immobilized TYA-1 cells (15 mg dry cells) simultaneously removed BPA, 4-tert-BP, and 4-tert-OP from complex polluted waters. These immobilized TYA-1 cells could be reused for a total of 9 cycles without any loss of degradation activity. Our results support the potential of using immobilized TYA-1 cells for the simultaneous removal of BPA and 4-APs from complex polluted waters.

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Nirmala, D., G. Pooja, U. Sowmya, Aezeden Mohamed, Avazova Durdona, V. Vignesh kumar, R. Rajavarman, and N. Parkunam. "System for Water Quality Monitoring and Distribution." E3S Web of Conferences 399 (2023): 01016. http://dx.doi.org/10.1051/e3sconf/202339901016.

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Water plays a vital role in the creation of human being and other natural phenomena. More than 80% of the resources is surrounded by water but in that only 20% is good for consumption others are fully polluted and contaminated. Now a days water is more polluted, and even supplied in a very lesser level so to check and monitor the quality of the water we mainly using a number of sensors are used to monitor the water’s quality and distribute it to the less fortunate. The quality of the water is affected by several parameters. Water is provided from difference resources like lake, pond, well, ground water, oceans etc.so these waters are not good for consumption Therefore, our goal is to assess the water’s quality while keeping an eye on the flow and level of the water. It is intended to use a variety of cutting-edge devices to check various water quality system parameters.

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Hasek, Raymond F., R. H. Sciaroni, and Roy L. Branson. "Water Conservation and Recycling in Ornamentals Production." HortScience 21, no. 1 (February 1986): 35–38. http://dx.doi.org/10.21273/hortsci.21.1.35.

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Abstract Most areas of northern California have ample water supplies from reservoirs, aqueducts, or deep wells, but some regions are not as fortunate. Such a region is Half Moon Bay located just 35 km south of San Francisco along the coastal plain. Several large producers of ornamental plants and cut flowers are located in the vicinity. Competition between homeowners and producers of ornamentals for available water in this area became critical by 1977 as a result of urban sprawl. In addition state and regional agencies began taking action to curtail polluted runoff waters from ornamental production sites. Locally the Coastside County Water District Water Quota Ordinance of 1977-78 instituted a water quota system with strong penalties for noncompliance. Statewide the California Fish and Game Code (1) was strictly enforced to prevent certain classified materials from passing into the waters of the state. The combination of these developments activated a search by growers for better use or reuse of irrigation water and separation of clean runoff waters from those that might be nutrient laden or otherwise polluted.

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Froom, P. "Determining standards for professional divers diving in benzene polluted waters." Toxicology and Industrial Health 24, no. 8 (September 2008): 525–30. http://dx.doi.org/10.1177/0748233708098126.

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The main objective of this study is to calculate the hours of diving in benzene-polluted waters acceptable for professional divers. We considered recommended absorption limit as that from pulmonary workplace absorption during an 8-h workday at recommended exposure limits set by the National Institute of Occupational Safety and Health, and developed a formula to determine recommended limits for diving time based on actual water and sediment concentrations and exposure conditions. The recommended absorption limit is 1.6 mg of benzene per workday. This is equivalent to total body dermal absorption over a 1-h dive at water concentration of 7.6 mg/L, or absorption from drinking 0.1 L of water with a concentration of 16.5 mg/L, or dermal absorption with 50% of the body covered in sediment with a concentration of 18,851 mg/kg. A formula that calculates allowable diving time considering benzene water and sediment concentrations, and gastrointestinal and dermal exposures is presented. Water concentrations and not exposure to sediment limit recommended diving time, and unlimited diving in areas with sediment and water concentrations thought to pose a serious human health hazard would not surpass the recommended amount of benzene absorbed in the workplace. We conclude that allowable diving time in polluted waters can be calculated resulting in absorption equivalent to recommended limits for pulmonary absorption in the workplace. Our results suggest that agencies determining significant health risk levels of chemical concentrations in sediment and water should consider our findings.

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Quintero-Núñez, Margarito, Benjamin Valdez, and Michael Schorr. "Effect of H₂S on Corrosion in Polluted Waters." Advanced Materials Research 95 (January 2010): 33–36. http://dx.doi.org/10.4028/www.scientific.net/amr.95.33.

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There is a deep universal concern today about the influence of pollutants on the environment including soil, air and in particular water, and about their effects on the durability of engineering materials and the deterioration of structures and the infrastructure. Water pollutants affect the terrestrial, atmospheric and aquatic environments, and even when present at very low levels of a few ppm may impair human health, aquatic life and water quality. The avoidance of water pollution is, therefore, an important part of water resource management. The present work provides an overview of the effects of hydrogen sulfide (H2S) on corrosion in polluted waters, including sea, river, brackish, geothermal and sewage waters.

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Siregar, M. A., M. F. Fachrul, S. M. P. Marendra, and D. I. Hendrawan. "Analysis of pollutant index in Gunung Putri Pond, West Java Province, Indonesia." IOP Conference Series: Earth and Environmental Science 1263, no. 1 (November 1, 2023): 012041. http://dx.doi.org/10.1088/1755-1315/1263/1/012041.

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Abstract Gunung Putri Pond is one of the lakes in Bogor Regency that functions as water reservoir, agricultural irrigation, fisheries activities, which has an area of 120,645 m2 and a depth ranging from 0.5 to 1.7 m. Gunung Putri Pond is surrounded by residential areas, agricultural land, and several industries which discharge their waste into the lake’s water bodies, including the motorcycle manufacturing industry, industrial equipment suppliers, the automotive industry, and construction companies which directly or indirectly pollute the waters of the lake. The aims is identify pollutant sources that have the potential to pollute waters, analyze water quality, and quality status for Gunung Putri Pond. The research was carried out in March 2023-July 2023. Water sampling was carried out at 6 points using the grab sampling method. The parameters analyzed in this study were temperature, pH, Dissolved Oxygen (DO), Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Nitrate (NO3-N), Phosphate (PO4), Iron (Fe), Lead (Pb) and E. coli. The results of water quality Gunung Putri Pond for parameters COD, Fe, Pb and E. coli exceed the quality standards of Government Regulation No. 22 Year 2021 Class 2. The water quality status of Gunung Putri Pond used Pollutant Index (IP) method with an average value of 2.78, which is lightly polluted category.

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Arum, Octyviana, Agatha Sih Piranti, and Christiani Christiani. "TINGKAT PENCEMARAN WADUK PENJALIN KECAMATAN PAGUYANGAN KABUPATEN BREBES DITINJAU DARI STRUKTUR KOMUNITAS PLANKTON." Scripta Biologica 4, no. 1 (March 1, 2017): 53. http://dx.doi.org/10.20884/1.sb.2017.4.1.386.

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Penjalin Reservoir is located in Brebes Regency, Indonesia. Human activity around Penjalin Reservoir, such as irrigation, aquaculture, and sanitation can affect its water’s quality. Plankton can be used as bioindicator since its existence is heavily affected by water physical and chemical factors. Polluted waters can affect diversity and abundance of plankton. The purpose of this research were to determine waters quality of Penjalin Reservoir, to know plankton community structure (abundance, diversity, and domination), and pollution level of each sampling station based on plankton diversity. This research used survey method on 6 sampling stations covering inlet, middle of reservoir, and outlet with 3 replicates and 4 weeks interval. Water quality were analyzed descriptively based on criteria of PP No. 82 Tahun 2001. Abundance and diversity were estimated as Shanon-Wiener index. Domination were estimated as Simpson index. Plankton abundance values varies from 4,970.30 to 12,923.37 ind/l with the most abundant species was Tetraedon minimum. Diversity index (H’) were high with value around 3.28–3.55 and domination index were around 0.04–0.07. These diversity indexes showed that the water quality of Penjalin Reservoir were not polluted.

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Azpiazu, M. N. "PROBLEMS OF IRRIGATION WITH POLLUTED WATERS IN GREENHOUSES." Acta Horticulturae, no. 246 (September 1989): 97–104. http://dx.doi.org/10.17660/actahortic.1989.246.9.

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Budiarsa, Suyasa W., E. Suprihatin Iryanti, Adi Suastuti G. A. Dwi, and Kunti Pancadewi G. A. Sri. "Exploration of sulfate reducing bacteria from polluted waters." African Journal of Microbiology Research 12, no. 21 (June 7, 2018): 492–500. http://dx.doi.org/10.5897/ajmr2018.8837.

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Moriñigo, M. A., R. Cornax, D. Castro, M. Jimenez-notaro, P. Romero, and J. J. Borrego. "Antibiotic resistance ofSalmonellastrains isolated from natural polluted waters." Journal of Applied Bacteriology 68, no. 3 (March 1990): 297–302. http://dx.doi.org/10.1111/j.1365-2672.1990.tb02578.x.

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Sola, Ines, Xavier Ausio, Rafel Simo, Joan O. Grimalt, and Antoni Ginebreda. "Quantitation of volatile sulphur compounds in polluted waters." Journal of Chromatography A 778, no. 1-2 (August 1997): 329–35. http://dx.doi.org/10.1016/s0021-9673(97)00415-9.

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41

Colarieti, M. "Soil-catalyzed polymerization of phenolics in polluted waters." Water Research 36, no. 12 (July 2002): 3015–22. http://dx.doi.org/10.1016/s0043-1354(02)00002-7.

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Muszkat, L., L. Bir, and L. Feigelson. "Solar photocatalytic mineralization of pesticides in polluted waters." Journal of Photochemistry and Photobiology A: Chemistry 87, no. 1 (March 1995): 85–88. http://dx.doi.org/10.1016/1010-6030(94)03957-v.

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Nistor, I. D., and N. D. Miron. "Depollution of uranyl polluted waters using pillared clays." Journal of Thermal Analysis and Calorimetry 89, no. 3 (February 13, 2007): 977–81. http://dx.doi.org/10.1007/s10973-006-7701-4.

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Ruthena, Yuli, Sutrisno Anggoro, and Tri Retnaning Soeprobowati. "Diversity of Plankton Bio-indicators on Water Quality of Lutan Lake, Palangka Raya, Central Kalimantan, Indonesia." E3S Web of Conferences 448 (2023): 03068. http://dx.doi.org/10.1051/e3sconf/202344803068.

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Lutan Lake in Palangkaraya is one of the most important oxbow lakes for the people of Palangka Raya. The many water resources with high economic value in Lutan Lake require sustainable management to maintain their quality. One of the indicators for determining lake water quality is the analysis of bio-indicators and water’s physical and chemical quality. The purpose of this study was to analyze the quality of lake water using the presence of biological indicators such as plankton and water quality parameters. This study used a quantitative descriptive method with a survey approach. The sampling was carried out at four stations with two-time variations, i.e., at 04.00 p.m. and 10.00 p.m. Based on the study’s results, it was found that the quality of Lutan lake water for classes I, III, and IV were included in the lightly polluted category. For class II, it was in the moderately polluted category. The plankton parameter shows that the index of phytoplankton and zooplankton diversity looks low with an indication of an unstable aquatic ecosystem due to the dominance of species which indicated the condition of the waters of Lake Luta has been polluted.

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Ibrahim, Aiman, Muhamad Suhaemi Syawal, Achmad Sjarmidi, Siti Aisyah, Sugiarti Sugiarti, Aldiano Rahmadya, and Agus Waluyo. "Assessment of Cihampelas River Water Quality Status using STORET Method and Pollution Index." Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan 20, no. 3 (August 10, 2023): 644–54. http://dx.doi.org/10.14710/presipitasi.v20i3.644-654.

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The Cihampelas River is one of river that crosses the Regency and City of Bandung, West Java, with a length of 8.5 km. This study aims to assess the water quality status of Cihampelas River based on the STORET method and Pollution Index. The research was conducted at four stations based on the level of anthropogenic activity from July to September 2016. Measurements of the physical and chemical parameters of the waters were carried out five times at two-week intervals. Water quality status was assessed using the STORET method and Pollution Index based on the parameters TDS, TSS, pH, DO, BOD, COD, nitrate, nitrite, ammonia, and total phosphorus (TP). Using the STORET method, shows a score of -20 to -46 in the category of moderately to severely polluted waters. Based on the Pollution Index method, the waters of the Cihampelas River show lightly to severely polluted conditions with a score of 1.14 to 44.66. The water quality status of the Cihampelas River shows a decreasing trend from the upstream to the downstream.

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Zhinzhakova, Liliya Zuberovna, and Elena Alexandrovna Cherednik. "TO THE QUESTION OF COMPREHENSIVE ASSESSMENT OF SURFACE WATER IN THE CENTRAL CAUCASUS DURING WINTER BETWEEN AND SUMMER FLOOD." Chronos 6, no. 5(55) (May 13, 2021): 22–27. http://dx.doi.org/10.52013/2658-7556-55-5-7.

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Based on long-term observations, the assessment of the pollution of the rivers of the Central Caucasus was carried out by comparing the calculated coefficients of the complexity of pollution and the specific combinatorial index of pollution of surface waters, and the quality classes were determined. The results of chemical analysis of the concentration levels of trace impurities (Mo, Pb, Zn, V, Ni, Cr, Mn, Ag) and inorganic nitrogen compounds (NO2 -, NO3 — and NH4 +) in the waters of 13 rivers in two permanent sections of each watercourse were used. The results of calculating the indicators of pollution in the waters of rivers of winter low water and summer high water are presented. The most polluted watercourses and the frequency of pollution in each river are identified, estimated by the values of the specific combinatorial index of water pollution, the coefficient of complexity of pollution, and the class of water quality is presented. The assessment of the most polluted water bodies during the winter low-water period and summer flood is given according to the classification of water quality. According to long-term observations, the features of watercourses and their differences in terms of pollution are presented.

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Marszewska, Anna, Kamila Kopczyńska, Anna Cichy, and Elżbieta Żbikowska. "Infestation of Bivalvia by Dreissena polymorpha (Pallas, 1771) in thermally polluted lakes." Oceanological and Hydrobiological Studies 48, no. 1 (March 26, 2019): 85–89. http://dx.doi.org/10.1515/ohs-2019-0009.

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Abstract Unionid mussel species belong to one of the most threatened invertebrate groups on Earth. Biological invasions, especially those by filtering species, are parti cularly harmful to nati ve Unionidae species. In Poland, a significantly disturbing situati on of native Unionidae is observed in thermally polluted aquatic ecosystems. Such water bodies have favorable conditions for the settlement of alien mollusks, including Sinanodonta woodiana or Corbicula fluminea, whose shells can potenti ally be a beneficial substrate for Dreissena polymorpha. The objecti ve of the presented research was to check whether zebra mussels can hinder the invasion of alien species of bivalve mollusks in thermally polluted waters. Our results indicate that with the increase in thermal polluti on associated with the growing invasion of alien species of bivalves, D. polymorpha infestations of clams decrease considerably, which leads to the conclusion that D. polymorpha does not pose a significantnatural threat to bivalves in the lakes under study.

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Hanum, Galuh Ratmana, David Andrian Wahyudi, and Intan Ayu Kusuma Pramushinta. "Analysis of Lead (Pb) and Zinc (Zn) Levels in Milkfish (Chanos Chanos) at Kalanganyar Market Sidoarjo Using Atomic Absorption Spectrophotometer (Aas) Method." Medicra (Journal of Medical Laboratory Science/Technology) 4, no. 2 (December 31, 2021): 65–71. http://dx.doi.org/10.21070/medicra.v4i2.1509.

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Water pollution occurs due to the inclusion of chemical substances, components in the form of gases, and solvents so that the quality of water becomes polluted and harmful to the life of organisms in the waters, especially in fish farming. Polluted waters can contain heavy metals. fish can be exposed to heavy metals due to polluted waters. Heavy metals with high or low levels can also cause various types of dead water biota. If the fish exposed to heavy metals consumed by humans will over-accumulate or accumulate in the body, thus endangering health. This study was conducted to determine the levels of heavy metals Lead (Pb) and Zinc (Zn) contained in the meat of fish bandeng in the market Kalanganyar Sidoarjo with Atomic Absorption Spectrophotometer (AAS). This research was conducted in Applied Chemistry Laboratory of Medical Laboratory of Faculty of Health Sciences, University of Muhammadiyah Sidoarjo and Chemistry Laboratory of FMIPA Universitas Islam Maulana Malik Ibrahim Malang in February-April 2021. In this study using descriptive cross sectional research type. Data analysis method using measurement and observation as well as descriptive statistical analysis. 20 samples were used. The results of heavy metal levels in this study obtained the highest levels of lead heavy metal (Pb) of 0.354 mg/kg. While the lowest level is 0.062 mg/kg. Zinc (Zn) heavy metal content is highest at 3,132 mg/kg. While the lowest level is 0.606 mg/kg.

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Kaban, Siswanta, M. Edi Armanto, M. Rasyid Ridho, and Poedji L. Hariani. "Rapid Assessment of Water Quality in Teluk Lake by Using Macroinvertebrates (A Family Level Biotic Index)." E3S Web of Conferences 68 (2018): 04006. http://dx.doi.org/10.1051/e3sconf/20186804006.

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In this study the water quality of Teluk Lake, Jambi Province by biological indices using macroobenthic during December 2017 to March 2018 were evaluated. Macro obenthic have been the most commonly indicator of running water quality to rapidly detect water quality changes. The methodology consisted on three stages: 1) macro invertebrates sampling and and sorting of the organisms in laboratory, 2) taxonomic identification of organisms and 3) determination and scoring with the Biological Monitoring Working Party -Average Score per Taxon (BMWP-ASPT) index. Result of water quality of Teluk Lake based on the diversity of macroinvertebrates was degraded with BMWP-ASPT index below 4. Based on the BMWP-ASPT score of the macroinvertebrates, both of sampling 1 and 2 were polluted with the category of medium and heavily polluted. In general, the decreasing of water quality of Teluk Lake was due to anthropogenic activities, so that the intolerant macro invertebrates could not survive in polluted waters while the tolerant ones can adapt well to the polluted aquatic environment.

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Yang, Dongfang, Sivakumar Manickam, and Xiaoju Zhang. "Influence of Human Activity on Hg Transportation." E3S Web of Conferences 406 (2023): 04029. http://dx.doi.org/10.1051/e3sconf/202340604029.

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Hg pollutes the environment, living organisms, and humans; hence, studying Hg content is essential for human health security. Using the dataset in May, September, and October, the Hg content, horizontal distribution, sources and transportation paths in the waters of Jiaozhou Bay were easily determined. These results indicate that the Hg content changing range in the waters in May, September and October was 0.015-0.150 μg/L, corresponding to the national seawater quality standards of Class I and Class II. The Hg content in the water body mainly arises from two sources, the transportation of rivers and offshore ocean currents. It from rivers' offshore ocean currents was 0.019-0.150 μg/L and 0.020 μg/L, respectively. Among them, the transportation of rivers includes the transportation of Haibo River, Licun River and Loushan River. So, a model block diagram has been built to unveil Hg contents and its different paths during the transportation to Jiaozhou Bay. Thus, it becomes easy to quantitively determine the migration process of Hg content through human activities to the ocean and rivers. Hg's different paths and contents reveal four rules for entering Jiaozhou Bay. In May, the offshore ocean currents and Haibo River did not affect by Hg pollution. In September, the Laoshan River was not polluted by it. In October, the Licun River was not, while the Haibo River exhibited light Hg pollution. When the Hg content transported by rivers was relatively low, it by offshore ocean currents became visible. From May to October, three rivers were transporting Hg content. Hg mildly polluted only one river in October, depicting that human activity is a key concern for environmental protection. It discharged by humans to land was relatively low, meanwhile only once was river transportation slightly polluted by it.

Journal articles on the topic 'Polluted waters'

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