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Добірка наукової літератури з теми "Water pollutant"

Автор: Grafiati

Опубліковано: 11 березня 2023

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Статті в журналах з теми "Water pollutant"

Fišák, J., M. Tesař, and D. Fottová. "Pollutant concentrations in rime and fog water." Soil and Water Research 3, Special Issue No. 1 (June 30, 2008): S68—S73. http://dx.doi.org/10.17221/1406-swr.

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: The present study deals with a comparison between the pollutant concentrations in the samples of rime and of fog water (so-called deposited or occult precipitation) collected at the Milešovka Observatory. Although rime can be observed during a limited part of the year, it still has an important share in the total amount of precipitation and can contribute significantly to a local increase in pollutant loads. The total sum of the selected free ions in the rime water represents approximately a half of the total sum of the selected free ions in the fog water. The relative contents of free ions in the mean sample were different in rime and fog water with the exception of K<sup>+</sup>, Mg<sup>2+</sup> and F– that did not show any significant variations.

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Duan, Maoqing, Xia Du, Wenqi Peng, Shijie Zhang, and Liuqing Yan. "Necessity of Acknowledging Background Pollutants in Management and Assessment of Unique Basins." Water 11, no. 5 (May 27, 2019): 1103. http://dx.doi.org/10.3390/w11051103.

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The limitations of water quality management and assessment methods in China can be ascertained by comparison with other countries. However, it is unreasonable to use a uniform standard to evaluate water quality throughout China because one standard cannot fully account for the regional differences in background water quality. This study aimed to provide a basis for environmental water management decision-making. Areas seriously affected by background pollutants were identified by comparing several factors across 31 provinces in China. By coupling an improved export coefficient model (ECM) with a mechanistic model, a suitable pollutant yield coefficient was determined and its rationality was analysed. The export coefficient model was applied to estimate the pollutant (chemical oxygen demand and ammonia nitrogen) output of the basin in 2015. The spatial distribution characteristics of the pollutants were determined by simulating the pollutant outputs of 22 sub-basins and nine water function zones. For the year 2020, the simulation results of pollutant outputs far exceed the sewage discharge limit in water function zones and the pollutant concentration was much higher than the standard. Considering background pollutant outputs, more reasonable sewage discharge limit and water quality evaluation method are proposed.

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Chu, Peter C., and Kleanthis Kyriakidis. "Chemical Spill Characteristics in the San Diego Bay." Marine Technology Society Journal 45, no. 2 (March 1, 2011): 52–58. http://dx.doi.org/10.4031/mtsj.45.2.5.

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AbstractDispersion of ocean pollutants in estuarine environments and bays (such as San Diego Bay) depends on the location of the source of the pollutants relative to the mouth and the tidal excursion, which is the net horizontal distance over which a pollutant particle moves during one tidal cycle of flood and ebb. Pollutant dispersion was investigated using a coupled hydrodynamic and chemical discharge model in this study. The results show the existence of two distinct (northern and southern) spill patterns of pollutant dispersion. The northern spill pattern is characterized by fast reduction of the pollutant concentration in the water column, rapid dispersion of pollutants to the San Diego port and to outside of the San Diego Bay, and slow dispersion of pollutants to the southern bay. The southern spill pattern is characterized by slow reduction of the pollutant concentration in the water column, slow dispersion, and confinement of pollutants in the southern San Diego Bay. The results may be useful for ocean pollution control and management.

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Cao, Liping, Xinyu Liu, Shuai Zhang, and Mingjie Lyu. "Comparison of Regional Urban Water Pollutants Emission Standards and Determination of Factors Influencing Their Integration—A Case Study of the Biopharmaceutical Industry in the Yangtze River Delta Urban Agglomeration." Sustainability 14, no. 8 (April 15, 2022): 4741. http://dx.doi.org/10.3390/su14084741.

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Urban pharmaceutical industries are responsible for high intensity emissions of water pollutants. The regional water pollutant emission standards vary greatly throughout the Yangtze River Delta Urban Agglomeration (YRDUA) in China, which, to some extent, results in increased risks and hidden dangers to regional water environment safety, especially water quality. Under the national strategy of Yangtze River Delta ecological and green integration development, a unified standard of water pollutant emissions should be integrated into the integration development process, but differences between characteristic items, concentration limits, and conditions among four local standards of water pollutant emission have become a key influencing factor in their integration in industry and in green transformation. When comparing the water pollutant emission standards of the biopharmaceutical industry in three provinces and one municipality of the YRDUA, the factors influencing integration were determined and caused by the main differences in local water pollutant emission standards, namely, the race to the bottom of the biopharmaceutical industry, the inconsistency of environmental protection regulation law, and transboundary water pollution risks. From the perspective of urban water quality safety, we propose the following strategies for promoting the integration of water pollutant emission standards in the YRDUA: (1) increasing government funding for local water pollution governance and encouraging industries to adopt the third-party governance model for pollution control in the YRDUA; (2) unifying water pollutant emission standards and environmental law enforcement standards in the YRDUA with a mechanism involving shared economic responsibility; and (3) establishing a platform for sharing data and governance performance for the emission of water pollutants in the YRDUA.

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Sagar bhandari, Prem. "An Analytical Model for Concentration of Water Pollutant." International Journal of Scientific Research and Management 9, no. 1 (January 31, 2021): 315–20. http://dx.doi.org/10.18535/ijsrm/v9i01.m02.

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In this paper, an advection- dispersion equation for the pollutant concentration is solved assuming zero initial rate of pollutant. To solve the dispersion equation in unsteady state condition, the transformation technique has been used. .It is obtained that the concentration of the pollutants in a small river decreases continuously with increasing distance.

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Liu, Rui. "Research on Control Method of Pollutant Total Amount of Water Quality based on Fuzzy Mathematics." Earth Sciences Research Journal 24, no. 2 (April 1, 2020): 191–99. http://dx.doi.org/10.15446/esrj.v24n2.87248.

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With the increase of pollutants discharged into the water, it is difficult to control the water environment pollution via reducing part of pollutant discharge. Therefore, the control method of pollutant total amount of water quality based on fuzzy mathematics is proposed. Firstly, a control framework and process of the pollutant total amount was built. The total amount of pollutant discharged into this region was controlled within a certain amount to achieve the predetermined environmental objective. Then, water pollution of different regions was evaluated via water quality model based on the fuzzy mathematics in the region or key protection domain with severe pollution and a concentrated pollution source, which makes the comprehensive evaluation of the water quality pollution more scientific. Finally, the control of pollutant total amount was completed via the optimized combination of point source control and unit control of total amount. Experimental results show that the method is scientific, objective and reasonable during controlling the pollutant discharge. It controls the pollutant total amount excellently.

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Zhang, Hongbo, Tianqi Ao, Maksym Gusyev, Hiroshi Ishidaira, Jun Magome, and Kuniyoshi Takeuchi. "Distributed source pollutant transport module based on BTOPMC: a case study of the Laixi River basin in the Sichuan province of southwest China." Proceedings of the International Association of Hydrological Sciences 379 (June 5, 2018): 323–33. http://dx.doi.org/10.5194/piahs-379-323-2018.

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Abstract. Nitrogen and phosphorus concentrations in Chinese river catchments are contributed by agricultural non-point and industrial point sources causing deterioration of river water quality and degradation of ecosystem functioning for a long distance downstream. To evaluate these impacts, a distributed pollutant transport module was developed on the basis of BTOPMC (Block-Wise Use of TOPMODEL with Muskingum-Cunge Method), a grid-based distributed hydrological model, using the water flow routing process of BTOPMC as the carrier of pollutant transport due a direct runoff. The pollutant flux at each grid is simulated based on mass balance of pollutants within the grid and surface water transport of these pollutants occurs between grids in the direction of the water flow on daily time steps. The model was tested in the study area of the Lu county area situated in the Laixi River basin in the Sichuan province of southwest China. The simulated concentrations of nitrogen and phosphorus are compared with the available monthly data at several water quality stations. These results demonstrate a greater pollutant concentration in the beginning of high flow period indicating the main mechanism of pollution transport. From these preliminary results, we suggest that the distributed pollutant transport model can reflect the characteristics of the pollutant transport and reach the expected target.

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Daewel, Ute, Evgeniy V. Yakushev, Corinna Schrum, Luca Nizzetto, and Elena Mikheeva. "Understanding the Role of Organic Matter Cycling for the Spatio-Temporal Structure of PCBs in the North Sea." Water 12, no. 3 (March 14, 2020): 817. http://dx.doi.org/10.3390/w12030817.

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Using the North Sea as a case scenario, a combined three-dimensional hydrodynamic-biogeochemical-pollutant model was applied for simulating the seasonal variability of the distribution of hydrophobic chemical pollutants in a marine water body. The model was designed in a nested framework including a hydrodynamic block (Hamburg Shelf Ocean Model (HAMSOM)), a biogeochemical block (Oxygen Depletion Model (OxyDep)), and a pollutant-partitioning block (PolPar). Pollutants can be (1) transported via advection and turbulent diffusion, (2) get absorbed and released by a dynamic pool of particulate and dissolved organic matter, and (3) get degraded. Our model results indicate that the seasonality of biogeochemical processes, including production, sinking, and decay, favors the development of hot spots with particular high pollutant concentrations in intermediate waters of biologically highly active regions and seasons, and it potentially increases the exposure of feeding fish to these pollutants. In winter, however, thermal convection homogenizes the water column and destroys the vertical stratification of the pollutant. A significant fraction of the previously exported pollutants is then returned to the water surface and becomes available for exchange with the atmosphere, potentially turning the ocean into a secondary source for pollutants. Moreover, we could show that desorption from aging organic material in the upper aphotic zone is expected to retard pollutants transfer and burial into sediments; thus, it is considerably limiting the effectiveness of the biological pump for pollutant exports.

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Literathy, Peter, Ferenc Laszlo, and Bela Csanyi. "Approaches for sediment associated pollutant monitoring in the River Danube." Water Science and Technology 30, no. 5 (September 1, 1994): 157–65. http://dx.doi.org/10.2166/wst.1994.0234.

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Inorganic and organic pollutants (nutrients and toxic pollutants) are liable to accumulate in suspended and bottom sediments. The major transport of these pollutants takes place in the suspended load. Sedimentation and resuspension are in dynamic equilibrium along the river influenced mainly by physical processes. International and national surveys on the Danube sediment concluded that the Danube reach between Vienna and Budapest is one of the most polluted ones in addition to the Irongate reservoir and the downstream reach. The main polluting compounds are petroleum hydrocarbons, including PAHs, and heavy metals. Reservoirs are the major traps of sediment-bound pollutants where pollutant “time-bombs” may be developed. Pollutant monitoring of the bottom sediment requires careful selection of the representative sampling sites where the sediment contains at least 10 percent clay and silt which is enriched in pollutants. Mobilization of the sediment-bound pollutants will result in biological uptake by the benthic organisms. The macrozoobenthons monitoring provides valuable evidence for chronic biological stress associated with contaminated sites. Benthic biodiversity decreased along the studied Danube reach downstream of recognized hot spots such as major cities (Vienna, Bratislava, Budapest) and polluted tributaries (the Vah river, etc.). Harmonization between chemical measurements and biological observations in the sediment could eventually lead to an effective Danube pollution monitoring system.

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Ивашкин, A. Ivashkin, Новиков, D. Novikov, Камруков, A. Kamrukov, Малков, and K. Malkov. "Calculation Model of Photochemical Reactor with a Pulse Xenon Lamp for Water Treatment." Safety in Technosphere 5, no. 4 (August 25, 2016): 51–57. http://dx.doi.org/10.12737/23762.

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A calculation model of the photochemical reactor based on a pulse xenon lamp and intended for water treatment from microbiological or chemical pollutants has been developed and realized. The model includes several calculation modules, each one describes the basic physical processes ongoing in the photochemical reactor: current’s form calculation module, pollutant’s particles trajectories calculation module, pulse lamp’s radiating characteristics calculation module, module for photometric calculation, determining an energy radiation dose of pollutant particles. Calculation of lamp’s radiating characteristics is based on ideas of gas discharge physics and on a number of empirical dependences, for calculation of other parameters has been used the numerical simulation. Model verification has been carried out by comparison of calculated and experimental efficiencies for two types of photochemical reactors’ designs with use of the known pollutant. The developed calculation model allows perform multi-parameter optimization for designs and regime parameters of pulse photochemical reactors for the purpose of increase their energy efficiency, and level of water treatment from various chemical and biological pollutants.

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Дисертації з теми "Water pollutant"

Koutsouris, Alexander. "Water and pollutant flowsthrough the MejdurechyeReservoir, Uzbekistan." Thesis, Stockholm University, Department of Physical Geography and Quaternary Geology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-36549.

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Results show that chloride concentrations have decreased during July 2007-2008 with at least 10% in spite of a large specific evaporation and a reservoir volume reduction of at least 60%. The most important implication of this is that pollutants in the reservoir cannot have been subject of evapoconcentration during this period. DDT and Lindane have on the other hand increased with up to 50000% in concentration and 20000% mass compared to measurements dating back to 2002. A rough age estimation of DDT shows that the DDT has been mobilized recently. The results of this thesis may prove valuable when forming environmental policy plans and setting up future monitoring programs.

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Smith, Jonathan William Neil. "Pollutant retardation at the groundwater- Surface water interface." Thesis, University of Sheffield, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.500234.

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Nanayakkara, Mummullage Sandya Wasanthi. "Source characterisation of urban road surface pollutants for enhanced water quality predictions." Thesis, Queensland University of Technology, 2015. https://eprints.qut.edu.au/82065/1/Sandya%20Wasanthi_Nanayakkara%20Mummullage_Thesis.pdf.

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This study developed a comprehensive research methodology for identification and quantification of sources responsible for pollutant build-up and wash-off from urban road surfaces. The study identified soil and asphalt wear, and non-combusted diesel fuel as the most influential sources for metal and hydrocarbon pollution respectively. The study also developed mathematical models to relate contributions from identified sources to underlying site specific factors such as land use and traffic. Developed mathematical model will play a key role in urban planning practices, enabling the implementation of effective water pollution control strategies.

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Koutsouris, Alexander. "Water and pollutant flows through the Mejdurechye Reservoir, Uzbekistan." Thesis, Stockholms universitet, Institutionen för naturgeografi och kvartärgeologi (INK), 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-36549.

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Karakalpakstan, Uzbekistan, has faced water scarcity and low water during several years as a consequence of Uzbekistan’s extensive irrigation of cotton fields. The environmental status of the Mejdurechye Reservoir, which is the largest in the lower Amudarya Delta, is therefore of great local importance. This thesis quantifies pollutant mass flows through the reservoir, concidering for instance salt, DDT and Lindane (HCH). Surface water flow paths through Mejdurechye Reservoir are also conceptualized in order to provide suggestions for future a possible monitoring program. Results show that chloride concentrations have decreased during July 2007-2008 with at least 10% in spite of a large specific evaporation and a reservoir volume reduction of at least 60%. The most important implication of this is that pollutants in the reservoir cannot have been subject of evapoconcentration during this period. DDT and Lindane have on the other hand increased with up to 50000% in concentration and 20000% mass compared to measurements dating back to 2002. A rough age estimation of DDT shows that the DDT has been mobilized recently. The results of this thesis may prove valuable when forming environmental policy plans and setting up future monitoring programs.

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Lee, Aik Heng. "Prediction of pollutant leaching from landfill." Thesis, Curtin University, 2010. http://hdl.handle.net/20.500.11937/2182.

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Landfill is continued to be the most common approach to solid waste disposal. On contrary, landfill practice is still common with increase in water pollution due to leaching of pollutants.Leachate generation from landfill can be defined into two phases, firstly soluble salt produced due to aerobic decomposition or acetogenic phase and secondly methane and carbon dioxide due to anaerobic decomposition or methanogenic phase.Characterization of landfill leachate is used in design to achieve low hydraulic conductivity or decrease permeability as leachate percolating through the waste strata and most important is used to predict level of pollutant in leachate which depend on factors such as temperature, precipitation and waste age. It is therefore crucial for landfill design to take into consideration of factors affecting leachate quality.The purpose of this research is to develop a correlation relationship of factors affecting leachate quality to predict pollutants from landfill which are determined by temperature, precipitation and waste age. The objective of this research is to determine, based the relationship developed and calibration of data obtained from literature review, the optimization of design that reduce pollutants in leachate generated from landfill taking into consideration of basic factors of temperature, precipitation and waste age of landfill.Results of the study revealed that there is a good correlation of pollutants leaching from landfill to the factors of temperature, precipitation and waste age. Higher pollutant concentration is found in average age landfill than the mature age landfill site mainly due to transition from acetogenic phase to methanogenic phase of pollutant decomposition. It is also anticipated that as carbonaceous organic matter decrease in leachate, nitrogeneous organic matter removal is activated in the mature landfill.Using Multiple Regression Analysis Method, mathematic model known as Pollutant Prediction Model is developed to correlate relationship of pollutants to factor affecting leachate quality in the landfill site in terms of temperature, precipitation and waste age.

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MacDonald, Louise Ann. "Sub-surface migration of an oil pollutant into aquifers." Thesis, University of Plymouth, 2000. http://hdl.handle.net/10026.1/1810.

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The risk to groundwater quality following a sub-surface spillage of immiscible pollutants such as oil, petroleum and other organic chemicals is an increasingly potent threat, through escalating industrial application of such pollutants. This study significantly enhances the understanding of the flow of immiscible pollutants within soil, through field scale investigations to define the spatial variability and extent of a contaminated area and the development of a comprehensive framework for the analysis of oil pollutant migration. This study represents a first attempt by researchers to analyse oil pollutant migration on a wide range of scales, from pore- to field-level. The research shows that quantity of pollutant is a critical factor in determining the extent of oil migration. Permeability and porosity of the sample material are also important secondary factors. High permeability assists the migration of oil pollutants. Soils with a high porosity allow the pollutant to migrate vertically under the influence of gravity, whereas soils with low porosity induce lateral oil migration, as the oil spreads from the point of injection. A Jull scale field study using contrasting soil types determines that oil migration is approximately symmetrical about the point of injection. Experimental data is used to establish modelling capabilities for the characterisation of pollutant migration. Modelling is undertaken at two levels. The first consists of the development of simple Gaussian equations based upon observations of oil glomuses. The glomus approach, newly developed in this work, can be compared to a fractal model, with the glomuses observed in each of the different scales studied.

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Watkins, Edwin W. "Extended stormwater detention basin design for pollutant removal." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-08042009-040522/.

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Young, De'Etra Jenra. "Development of an ArcGIS-pollutant load application (PLOAD) tool." [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1791.

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Burkhard, Jamie Lynn. "Water Infiltration and Pollutant Rentention Efficiencies in the Ballona Creek Rain Garden." Digital Commons at Loyola Marymount University and Loyola Law School, 2018. https://digitalcommons.lmu.edu/etd/523.

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Biofiltration systems like rain gardens and bioswales are an important tool for capturing and infiltrating polluted runoff, but little data exists on their efficiencies within Mediterranean climates. A two-year study initiated in 2015 investigated water retention and pollutant loading and retention in the Ballona Creek Rain Garden (BCRG). This 300 by 3 m biofiltration system was constructed by The Bay Foundation in 2011 along Ballona Creek in Culver City, Los Angeles County, California. The purpose of the garden was to capture and infiltrate runoff from light industrial and commercial operations bordering the Creek, thus reducing pollutants entering this waterway and flowing into Santa Monica Bay 9 km downstream. During storm events, runoff enters the garden via five inlets, and when filled, flows into the creek via two outlets. The goal of this study was to sample flows and pollutant concentrations in runoff entering and leaving the garden and then integrate these to calculate mass loading estimates. Flows were measured at all inlets and outlets using 90° V-notch weirs outfitted with Hobo water level sensors to produce hydrographs. The following pollutants were measured at all flowing inlets and outlets two to three times per storm depending on its duration and intensity: fecal indicator bacteria (E. coli and enterococci), total suspended solids, metals (copper, zinc, and lead), and semivolatile hydrocarbons (polyaromatic hydrocarbons, diesel hydrocarbons, and motor oil hydrocarbons). The summation of load method was used to calculate the mass of contaminants entering and leaving the garden for each storm event, and their percent capture within the garden. The BCRG was very effective at infiltrating runoff and sequestering pollutants. The garden’s infiltration rates ranged from 73% to 100% (with 100% for many of the smaller storms

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Molero, de Blas Luis Javier. "Pollutant formation and interaction in the combustion of heavy liquid fuels." Thesis, University College London (University of London), 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286382.

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Книги з теми "Water pollutant"

Tsuzuki, Yoshiaki. Pollutant Discharge and Water Quality in Urbanisation. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-04756-0.

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1956-, Jacoby Jean M., and Welch E. B, eds. Pollutant effects in fresh waters: Applied limnology. New York: Spon Press, 2004.

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Webber, Margo. Pollutant reductions from WWTP upgradings in Massachusetts, 1978-1988. Westborough, MA: Massachusetts Dept. of Environmental Quality Engineering, Division of Water Pollution Control, Technical Services Branch, 1989.

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Marshall Islands. Environmental Protection Authority. Marshall Islands pollutant discharge elimination system (MIPDES) regulations: Draft. [Majuro?]: The Authority, 1995.

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Welch, E. B. Ecological effects of waste water: Applied limnology and pollutant effects. 2nd ed. London: Chapman & Hall, 1992.

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Humble, Joyce L. A step in the right direction: The national pollutant discharge elimination system. Bellingham, Wash: Huxley College of Environmental Studies, Western Washington University, 1986.

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S, Giam C., and Ray Lee E. 1941-, eds. Pollutant studies in marine animals. Boca Raton, Fla: CRC Press, 1987.

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1953-, Tsanis Ioannis K., ed. Environmental hydraulics: Hydrodynamic and pollutant transport modelling of lakes and coastal waters. Amsterdam: Elsevier, 2007.

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Britain), Royal Society (Great, ed. Pollutant control priorities in the aquatic environment: Summary, conclusions, and recommendations. London: Royal Society, 1994.

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Texas Commission on Environmental Quality., ed. Texas pollutant discharge elimination system: Multi-sector industrial general permit for storm water-TXR050000. Austin, TX: Texas Commission on Environmental Quality, 2006.

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Частини книг з теми "Water pollutant"

Tsuzuki, Yoshiaki. "Pollutant Load and Water Quality." In Pollutant Discharge and Water Quality in Urbanisation, 9–24. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-04756-0_2.

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Godsy, Edward M., Donald F. Goerlitz, and Dunja Grbiċ-Galiċ. "Transport and Degradation of Water-Soluble Creosote-Derived Compounds." In Intermedia Pollutant Transport, 213–36. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4613-0511-8_14.

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Jeffries, Dean S. "Impact of Acid Rain on Lake Water Quality in Eastern Canada." In Intermedia Pollutant Transport, 41–51. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4613-0511-8_3.

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Nataraj, S. K. "Nanomaterial-Based Water Filters for Emerging Pollutants." In Emergent Pollutant Treatment in Wastewater, 217–44. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003214786-7.

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Dhaneesha, M., Shahanas Beegam, and P. Periyat. "TiO2-Based Nanomaterial for Pollutant Removal." In Nanomaterials for Water Treatment and Remediation, 163–80. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003118749-5.

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Tsuzuki, Yoshiaki. "Pollutant Discharge Control of Municipal Wastewater." In Pollutant Discharge and Water Quality in Urbanisation, 45–68. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-04756-0_5.

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Gao, Baoyu, and Xing Xu. "Anionic Pollutant Removal by Biomass-Based Adsorbents." In Green Technologies for Sustainable Water Management, 455–90. Reston, VA: American Society of Civil Engineers, 2016. http://dx.doi.org/10.1061/9780784414422.ch13.

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Tsuzuki, Yoshiaki. "Water and Sanitation in Developing Countries." In Pollutant Discharge and Water Quality in Urbanisation, 69–88. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-04756-0_6.

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Muttin, Frédéric, Mario Ricchiuto, Iméne Meriem Mostefaoui, Mohktar Kirane, Cédric Goeury, and Jean-Michel Hervouet. "Session 2: Hydrodynamic Modeling and Diffusion of the Pollutant." In Marine Coastal and Water Pollutions, 19–38. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781119003021.ch2.

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Schon, J. P., O. Debbarh, P. Mejean, R. Morel, and J. P. Granier. "Wind Tunnel Modeling of Turbulent Diffusion of Pollutant Puffs." In Safety of Thermal Water Reactors, 441–50. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-4972-0_39.

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Тези доповідей конференцій з теми "Water pollutant"

Horst, Michael, Robert Traver, and Erika Tokarz. "BMP Pollutant Removal Efficiency." In World Environmental and Water Resources Congress 2008. Reston, VA: American Society of Civil Engineers, 2008. http://dx.doi.org/10.1061/40976(316)429.

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Park, Daeryong, Jim C. Loftis, and Larry A. Roesner. "Pollutant Load Evaluation in Stormwater Systems." In World Environmental and Water Resources Congress 2011. Reston, VA: American Society of Civil Engineers, 2011. http://dx.doi.org/10.1061/41173(414)72.

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Morquecho, R., R. Pitt, and S. E. Clark. "Pollutant Associations with Particulates in Stormwater." In World Water and Environmental Resources Congress 2005. Reston, VA: American Society of Civil Engineers, 2005. http://dx.doi.org/10.1061/40792(173)216.

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Remley, R., R. A. Morgan, F. G. Edwards, K. R. Brye, and Steven J. Burian. "Pollutant Removal Capacity of Stormwater Catchbasin Inserts." In World Water and Environmental Resources Congress 2005. Reston, VA: American Society of Civil Engineers, 2005. http://dx.doi.org/10.1061/40792(173)217.

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Rowberg, K., N. Nataraj, W. Saroian, and L. Kang. "Theoretical evaluation of substituted polycyclic aromatic hydrocarbons as emerging pollutant phototoxins." In WATER POLLUTION 2008. Southampton, UK: WIT Press, 2008. http://dx.doi.org/10.2495/wp080321.

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England, Gordon. "Lake Tohopekaliga Pollutant Modeling Study for Kissimmee, Florida." In World Environmental and Water Resources Congress 2006. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40856(200)447.

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Fassman, Elizabeth A., and Shaw L. Yu. "Comparison of Pollutant Removal Performance of Wetland Vegetation." In World Water and Environmental Resources Congress 2001. Reston, VA: American Society of Civil Engineers, 2001. http://dx.doi.org/10.1061/40569(2001)172.

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Smith, Ryan A., and William F. Hunt. "Pollutant Removal in Bioretention Cells with Grass Cover." In World Environmental and Water Resources Congress 2007. Reston, VA: American Society of Civil Engineers, 2007. http://dx.doi.org/10.1061/40927(243)581.

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Lewis, Chad L., Todd P. Sax, and L. Donald Duke. "Estimating Pollutant Loading from Industrial Activities in an Urban Watershed." In Joint Conference on Water Resource Engineering and Water Resources Planning and Management 2000. Reston, VA: American Society of Civil Engineers, 2000. http://dx.doi.org/10.1061/40517(2000)184.

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Clark, Shirley E., Julia M. Hafera, J. Bradley Mikula, James C. Elligson, Brett V. Long, and Melinda M. Lalor. "Pollutant Potential from Building Materials: Laboratory and Field Evaluations." In World Environmental and Water Resources Congress 2006. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40856(200)389.

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Звіти організацій з теми "Water pollutant"

Desiderati, Christopher. Carli Creek Regional Water Quality Project: Assessing Water Quality Improvement at an Urban Stormwater Constructed Wetland. Portland State University, 2022. http://dx.doi.org/10.15760/mem.78.

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Stormwater management is an ongoing challenge in the United States and the world at-large. As state and municipal agencies grapple with conflicting interests like encouraging land development, complying with permits to control stormwater discharges, “urban stream syndrome” effects, and charges to steward natural resources for the long-term, some agencies may turn to constructed wetlands (CWs) as aesthetically pleasing and functional natural analogs for attenuating pollution delivered by stormwater runoff to rivers and streams. Constructed wetlands retain pollutants via common physical, physicochemical, and biological principles such as settling, adsorption, or plant and algae uptake. The efficacy of constructed wetlands for pollutant attenuation varies depending on many factors such as flow rate, pollutant loading, maintenance practices, and design features. In 2018, the culmination of efforts by Clackamas Water Environment Services and others led to the opening of the Carli Creek Water Quality Project, a 15-acre constructed wetland adjacent to Carli Creek, a small, 3500-ft tributary of the Clackamas River in Clackamas County, OR. The combined creek and constructed wetland drain an industrialized, 438-acre, impervious catchment. The wetland consists of a linear series of a detention pond and three bioretention treatment cells, contributing a combined 1.8 acres of treatment area (a 1:243 ratio with the catchment) and 3.3 acre-feet of total runoff storage. In this study, raw pollutant concentrations in runoff were evaluated against International Stormwater BMP database benchmarks and Oregon Water Quality Criteria. Concentration and mass-based reductions were calculated for 10 specific pollutants and compared to daily precipitation totals from a nearby precipitation station. Mass-based reductions were generally higher for all pollutants, largely due to runoff volume reduction on the treatment terrace. Concentration-based reductions were highly variable, and suggested export of certain pollutants (e.g., ammonia), even when reporting on a mass-basis. Mass load reductions on the terrace for total dissolved solids, nitrate+nitrite, dissolved lead, and dissolved copper were 43.3 ± 10%, 41.9 ± 10%, 36.6 ± 13%, and 43.2 ± 16%, respectively. E. coli saw log-reductions ranging from -1.3 — 3.0 on the terrace, and -1.0 — 1.8 in the creek. Oregon Water Quality Criteria were consistently met at the two in-stream sites on Carli Creek for E. coli with one exception, and for dissolved cadmium, lead, zinc, and copper (with one exception for copper). However, dissolved total solids at the downstream Carli Creek site was above the Willamette River guidance value 100 mg/L roughly 71% of the time. The precipitation record during the study was useful for explaining certain pollutant reductions, as several mechanisms are driven by physical processes, however it was not definitive. The historic rain/snow/ice event in mid-February 2021 appeared to impact mass-based reductions for all metals. Qualitatively, precipitation seemed to have the largest effect on nutrient dynamics, specifically ammonia-nitrogen. Determining exact mechanisms of pollutant removals was outside the scope of this study. An improved flow record, more targeted storm sampling, or more comprehensive nutrient profiles could aid in answering important questions on dominant mechanisms of this new constructed wetland. This study is useful in establishing a framework and baseline for understanding this one-of-a-kind regional stormwater treatment project and pursuing further questions in the future.

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Chiang, Edwin. Methodology for Identifying and Quantifying Metal Pollutant Sources in Storm Water Runoff. Fort Belvoir, VA: Defense Technical Information Center, February 2015. http://dx.doi.org/10.21236/ada614503.

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Xu, Zhengfu, and Chi-Wang Shu. Anti-Diffusive Finite Difference WENO Methods for Shallow Water with Transport of Pollutant. Fort Belvoir, VA: Defense Technical Information Center, January 2006. http://dx.doi.org/10.21236/ada458954.

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Whelton, Andrew, Jeffrey Gill, Li Song, Bryce Froderman, Mahboobeh Teimouri, and Hua Cai. Lack of Data for Predicting Storm Water Pollutant Removal by Post-Construction Best Management Practices. Purdue University, November 2016. http://dx.doi.org/10.5703/1288284316332.

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Borgens, Melinda. Analysis of Toxic Pollutant Sources and Characteristics Contributing to Water Quality Impairments in the Willamette River Basin. Portland State University, June 2019. http://dx.doi.org/10.15760/mem.56.

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Rapp, Vi H., and Brett C. Singer. Effect of Fuel Wobbe Number on Pollutant Emissions from Advanced Technology Residential Water Heaters: Results of Controlled Experiments. Office of Scientific and Technical Information (OSTI), March 2014. http://dx.doi.org/10.2172/1131031.

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Johnson, Billy, and Zhonglong Zhang. The demonstration and validation of a linked watershed-riverine modeling system for DoD installations : user guidance report version 2.0. Engineer Research and Development Center (U.S.), April 2021. http://dx.doi.org/10.21079/11681/40425.

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A linked watershed model was evaluated on three watersheds within the U.S.: (1) House Creek Watershed, Fort Hood, TX; (2) Calleguas Creek Watershed, Ventura County, CA; and (3) Patuxent River Watershed, MD. The goal of this demonstration study was to show the utility of such a model in addressing water quality issues facing DoD installations across a variety of climate zones. In performing the demonstration study, evaluations of model output with regards to accuracy, predictability and meeting regulatory drivers were completed. Data availability, level of modeling expertise, and costs for model setup, validation, scenario analysis, and maintenance were evaluated in order to inform installation managers on the time and cost investment needed to use a linked watershed modeling system. Final conclusions were that the system evaluated in this study would be useful for answering a variety of questions posed by installation managers and could be useful in developing management scenarios to better control pollutant runoff from installations.

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Chefetz, Benny, Baoshan Xing, and Yona Chen. Interactions of engineered nanoparticles with dissolved organic matter (DOM) and organic contaminants in water. United States Department of Agriculture, January 2013. http://dx.doi.org/10.32747/2013.7699863.bard.

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Background: Engineered carbon nanotubes (CNTs) are expected to be increasingly released into the environment with the rapid increase in their production and use. The discharged CNTs may interact with coexisting contaminants and subsequently change environmental behaviors and ecological effects of both the CNTs themselves and the contaminants. Dissolved organic matter (DOM) plays a critical role in the transport of CNTs in the aquatic environment, affecting both CNT's surface properties through adsorption, and its colloidal stability in solution. Therefore, CNT-bound DOM complexes may interact with coexisting contaminants, thus affecting their environmental fate. With increasing production and use of CNTs, there is an increasing risk that humans could be exposed to CNTs mainly through ingestion and inhalation. Since CNTs can be carriers of contaminants due to their high adsorption affinity and capacity, the distribution of these nanoparticles in the environment holds a potential environmental and health risk. Project objectives: The overall goal of this project was to gain a better understanding of the environmental behavior of engineered nanoparticles with DOM and organic pollutant in aqueous systems. The scope of this study includes: characterizing various types of engineered nanoparticles and their interaction with DOM; binding studies of organic contaminants by nanoparticles and DOM-nanoparticle complexes; and examining interactions in DOM-nanoparticles-contaminant systems. Major conclusions, solutions and achievements: DOM has a pronounced effect on colloidal stability of CNTs in solution and on their surface chemistry and reactivity toward associated contaminants. The structure and chemical makeup of both CNTs and DOM determine their interactions and nature of formed complexes. CNTs, contaminants and DOM can co-occur in the aquatic environment. The occurrence of co-contaminants, as well as of co-introduction of DOM, was found to suppress the adsorption of organic contaminants to CNTs through both competition over adsorption sites and direct interactions in solution. Furthermore, the release of residual contaminants from CNTs could be enhanced by biomolecules found in the digestive as well as the respiratory tracts, thus increasing the bioaccessibility of adsorbed contaminants and possibly the overall toxicity of contaminant-associated CNTs. Contaminant desorption could be promoted by both solubilization and sorptive competition by biological surfactants. Scientific and agricultural implications: The information gained in the current project may assist in predicting the transport and fate of both CNTs and associated contaminants in the natural environment. Furthermore, the results imply a serious health risk from contaminant-associated CNTs.

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Steven B. Hawthorne and Arnaud J. Lagadec. REMOVAL OF ORGANIC POLLUTANTS FROM SUBCRITICAL WATER WITH ACTIVATED CARBON. Office of Scientific and Technical Information (OSTI), August 1999. http://dx.doi.org/10.2172/778429.

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Davisson, M. L. Isotopic Tracers for Delineating Non-Point Source Pollutants in Surface Water. Office of Scientific and Technical Information (OSTI), March 2001. http://dx.doi.org/10.2172/15013601.

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