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Опубліковано: 10 грудня 2022
Оновлено: 29 січня 2023

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Статті в журналах з теми "Algae Effect of heavy metals on"

1

Al-Hasawi, Zaki M., Mohammad I. Abdel-Hamid, Adel W. Almutairi, and Hussein E. Touliabah. "Response of Pseudokirchneriella subcapitata in Free and Alginate Immobilized Cells to Heavy Metals Toxicity." Molecules 25, no. 12 (June 19, 2020): 2847. http://dx.doi.org/10.3390/molecules25122847.

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Effects of 12 heavy metals on growth of free and alginate-immobilized cells of the alga Pseudokirchneriella subcapitata were investigated. The tested metals ions include Al, As, Cd, Co, Cr, Cu, Hg, Se, Ni, Pb, Sr, and Zn. Toxicity values (EC50) were calculated by graphical interpolation from dose-response curves. The highest to the lowest toxic metals are in the order Cd > Co > Hg > Cu > Ni > Zn > Cr > Al > Se > As > Pb > Sr. The lowest metal concentration (mg L−1) inhibiting 50% (EC50) of algal growth of free and immobilized (values in parentheses) algal cells were, 0.018 (0.09) for Cd, 0.03 (0.06) for Co, 0.039 (0.06) for Hg, 0.048 (0.050) for Cu, 0.055 (0.3) for Ni, 0.08 (0.1) for Zn, 0.2 (0.3) for Cr, 0.75 (1.8) for Al, 1.2 (1.4) for Se, 3.0 (4.0) for As, 3.3 (5.0) for Pb, and 160 (180) for Sr. Free and immobilized cultures showed similar responses to Cu and Se. The free cells were more sensitive than the immobilized ones. Accordingly, the toxicity (EC50) of heavy metals derived only form immobilized algal cells might by questionable. The study suggests that batteries of alginate-immobilized algae can efficiently replace free algae for the bio-removal of heavy metals.
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Zatout, Masoud M. M., Yousef K. A. Abdalhafid, and Salmeen H. Alhage. "Effect of Wastewater on Heavy Metal Accumulation in Cystoseria sp. (Brown algae) and Enteromorpha. sp. (Green algae) in Derna Coast, Libya." Al-Mukhtar Journal of Sciences 33, no. 2 (June 30, 2018): 149–60. http://dx.doi.org/10.54172/mjsc.v33i2.179.

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In this work was studied effect of wastewater pollution on heavy metal accumulation in Cystoseria sp., (brown seaweed) and Enteromorpha sp. (Green algae), in an effort to gain some insight into the level of metal contamination which might exist in the coastal marine environment along the Derna coast. Assessed by measuring the concentration of heavy metals as Pb, Zn, Mn and Cd, in the algae tissue and seawater. The results indicate concentrations of metals were invariably slightly higher in Enteromorpha sp., than in Cystoseria sp., at all sampling stations. The metals concentrations recorded for the different tissues and sites of the present study confirm the higher concentrations usually observed in summer. The average MPI was highest (0.86) for the both species inhabiting S6 station and least (0.29) at S1 station. In general, the all of heavy metals show no detrimental effects on the domestic aquatic environment of Derna coast. However, must be monitored continuously to ensure that they stay at harmless levels.
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Nekvapil, Fran, Iolanda-Veronica Ganea, Alexandra Ciorîță, Razvan Hirian, Sanja Tomšić, Ildiko Melinda Martonos, and Simona Cintă Pinzaru. "A New Biofertilizer Formulation with Enriched Nutrients Content from Wasted Algal Biomass Extracts Incorporated in Biogenic Powders." Sustainability 13, no. 16 (August 5, 2021): 8777. http://dx.doi.org/10.3390/su13168777.

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Raw algae waste naturally thrown on shores could pose serious threats for landfilling and its reuse for composting or further processing as added-value by-products require knowledge-based decisions and management for the sustainable development of local ecosystems. Raw marine waste containing salt (halite) and heavy metals that eventually accumulate in algae hamper their safe applicability in soil fertilization or in other exploitations. Here, the suitability of algal biomass for use as an environmentally safe fertilizer was investigated, thereby supporting sustainable coastal management. The simple extraction of the dry algal biomass of three abundant Mediterranean species, Enteromorpha intestinalis, Corallina elongata, and Gelidium pulchellum, in water containing sodium carbonate resulted in a greenish extract containing a reduced heavy metals content, and nutrients such as K+, PO43−, SO42−, NO3−, Ca2+, and Mg2+. UV-Vis and Raman techniques, including surface-enhanced Raman scattering (SERS), were employed for the fast evidencing of polyphenols, carotenoids, and chlorophylls in the extracts content, while E. intestinalis extract additionally exhibited polysaccharide signals. Heavy metals analysis showed that the major metals in the extracts were Fe, Ni, Zn, and Cu; however, their levels were an order of magnitude lower than in the dry biomass. The extracts also showed a mild antibacterial effect. The combination option of aqueous extracts with powdered crustacean shells to obtain a novel, eco-friendly, solid biofertilizer complex was further shown, which could be pelleted for convenient use. The immersion of solid biofertilizer pellets in water is accompanied by re-solubilization of the compounds originating from algae extracts, presenting the opportunity for dry storage and easier handling and land applicability. In summary, aqueous extracts of marine algae waste present an environmentally safe and attractive way to recycle excessive algal biomass and to formulate a new, eco-friendly biofertilizer complex.
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Hu, Zhewei, Shu Jin, Rongrong Ying, Xiaohui Yang, and Baoping Sun. "Eucalyptus Leaf Solution to Replace Metals in the Removal of Cyanobacteria in Wastewater from the Paper Mill Industry." Water 13, no. 8 (April 8, 2021): 1014. http://dx.doi.org/10.3390/w13081014.

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The frequent occurrence of cyanobacterial blooms, caused by the eutrophication of water bodies, has triggered several ecological issues. Metal-controlled cyanobacteria are resulting in a series of secondary environmental problems and thus limiting environmental sustainability. Whether there is a more environmentally friendly way to replace metals in the removal of cyanobacteria is still unclear. To explore whether common heavy metals inhibit algal growth and whether Eucalyptus leaves (EL) can replace heavy metal ions in controlling algae outbreaks, here, we add Fe3+, Al3+, 3 mol/L of zinc (Zn3), 10 mol/L zinc (Zn10), and EL to a medium containing Cyanobacteria. We determine the medium’s color (456 nm), UV (254 nm), chlorophyll a, turbidity, temperature, pH, total dissolved solids, conductivity, and blue-green algae (BGA) at days 1, 4, 7, 11, 14, 19, and 21. We find that Fe3+, Al3+, Zn3, Zn10, and EL can inhibit chlorophyll synthesis, thereby impeding algae biomass growth due to metal ions’ disruption of the chlorophyll structure. The toxicity of Zn2+ may be higher than that of Fe3+ and Al3+ since it can completely destroy the structure of chlorophyll a. The damage of Zn (10) to chlorophyll a is stronger than that of Zn (3), indicating that high concentrations of metals have a stronger inhibitory effect on algae. The toxicity of EL to algae is lower than that of other metals, but it can significantly inhibit the growth of algae. We suggest the use of Eucalyptus leaves to inhibit algal growth in eutrophic water bodies. Our results provide a scientific basis for an environmentally friendly approach to controlling cyanobacteria outbreaks.
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Wang, Yuhui, Xinshan Song, Hongwei Li, and Yi Ding. "Removal of metals from water using a novel high-rate algal pond and submerged macrophyte pond treatment reactor." Water Science and Technology 79, no. 8 (April 15, 2019): 1447–57. http://dx.doi.org/10.2166/wst.2019.140.

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Abstract A combined high-rate algal pond and submerged macrophyte pond (APMP) reactor was introduced as a novel biotechnique for efficient heavy metals (HMs) removal from wastewater. The role of water temperature, light regime, and N:P mass ratio on algae growth and HMs removal as well as effects of macrophyte species and densities on algae extermination were investigated through batch experiments. Results showed that water temperature significantly affected algae proliferation and HMs removal. Effects of light regime and N:P only showed obvious influences on HMs removal performance at high temperature. HMs removal efficiency reached 75.8% (Cr), 63.6% (Pb), and 61.1% (Zn) at 5-day hydraulic retention time (HRT) in APMP. Positive correlation existed closely between HMs removal and algal growth with long HRT. Algae were strongly inhibited by Ceratophyllum demersum and Vallisneria natans at plant density of 20–30 rhizomes m−2 with effluent algae concentration about 1,000 cells mL−1 at 7-day HRT. Results suggested that the APMP reactor was efficient for HMs removal from wastewater, indicating a possible effective metals removal technique by using APMP.
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Zeng, Guoming, Yu He, Dong Liang, Fei Wang, Yang Luo, Haodong Yang, Quanfeng Wang, et al. "Adsorption of Heavy Metal Ions Copper, Cadmium and Nickel by Microcystis Aeruginosa." International Journal of Environmental Research and Public Health 19, no. 21 (October 25, 2022): 13867. http://dx.doi.org/10.3390/ijerph192113867.

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To investigate the treatment effect of algae biosorbent on heavy metal wastewater, in this paper, the adsorption effect of M. aeruginosa powder on heavy metal ions copper, cadmium and nickel was investigated using the uniform experimental method, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and TG-DSC comprehensive thermal analysis. The experimental results showed that the initial concentration of copper ion solution was 25 mg/L, the temperature was 30 °C, the pH value was 8 and the adsorption time was 5 h, which was the best condition for the removal of copper ions by algae powder adsorption, and the removal rate was 83.24%. The initial concentration of cadmium ion solution was 5 mg/L, the temperature was 35 °C, the pH value was 8 and the adsorption time was 4 h, which was the best condition for the adsorption of cadmium ion by algae powder, and the removal rate was 92.00%. The initial nickel ion solution concentration of 15 mg/L, temperature of 35 °C, pH value of 7 and adsorption time of 1 h were the best conditions for the adsorption of nickel ions by algae powder, and the removal rate was 88.67%. The spatial structure of algae powder changed obviously before and after adsorbing heavy metals. The functional groups such as amino and phosphate groups on the cell wall of M. aeruginosa enhanced the adsorption effect of heavy metal ions copper, cadmium and nickel. Additionally, M. aeruginosa adsorption of heavy metal ions copper, cadmium, nickel is an exothermic process. The above experiments show that M. aeruginosa can be used as a biological adsorbent to remove heavy metals, which lays a theoretical foundation for the subsequent treatment of heavy metal pollution by algae.
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Guruvaiah, Mahendraperumal, and Keesoo Lee. "Effect of Flue Gas on Microalgae Population and Study the Heavy Metals Accumulation in Biomass from Power Plant System." International Journal of Applied Sciences and Biotechnology 2, no. 2 (June 25, 2014): 114–20. http://dx.doi.org/10.3126/ijasbt.v2i2.10247.

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Microalgae have high photosynthetic efficiency that can fix CO2 from the flue gas directly without any upstream CO2 separation, and concomitantly produce biomass for biofuel applications. These gases, both untreated and treated into current discharge standards, contain CO2, N2, H2O, O2, NOx, SOx, CxHy, CO, particulate matter, halogen acids and heavy metals. Microalgae population studies were conducted in a batch mode experiments at Power plant site of Chamois, Missouri. The experiments were conducted in different period (June to December 2011) of time. This study evaluated the effect of several heavy metals that are present in flue gases on the algae, focusing on the growth and accumulation of lipids in the algae that can be converted to biodiesel. The genus Scenedesmus presented the greatest richness of species and number of counted individuals in the flue gas ponds compare than non flue gas treatment ponds. Among the diatomaceae the genus Navicula sp, Nitizchia sp and Synedra sp. presented the next subdominant richness in the ponds. The last results of counted green algae Ulothrix sp and Coelastrum sp were least number of cells reported in these ponds. The heavy metal-contaminated in flue gas and also enter into the microalgae biomass population. Comparative studies were carried out by flue gas and control system of open ponds. Control system of microalgae population was represented in less amount of heavy metals compare than flue gas ponds.DOI: http://dx.doi.org/10.3126/ijasbt.v2i2.10247 Int J Appl Sci Biotechnol, Vol. 2(2): 114-120
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Ankit, Kuldeep Bauddh, and John Korstad. "Phycoremediation: Use of Algae to Sequester Heavy Metals." Hydrobiology 1, no. 3 (July 1, 2022): 288–303. http://dx.doi.org/10.3390/hydrobiology1030021.

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Industrialization, natural processes, and urbanization have potentially accelerated the pace and the level of heavy metals (HMs) in soil and underground water. These HMs may be accumulated in plants and animals when they take up such contaminated water, and then make their way into human food chains. Several remediation technologies have been employed to take up HMs. Diverse conventional means such as ion exchange, electrolytic technologies, and chemical extraction have been employed in the past, but the majority of these techniques are not economical for extensive projects and they need stringent control and continuous monitoring. These technologies also have low efficiency for effective removal of HMs. In this context, algae offer an eco-friendly and sustainable alternative for remediation of HMs from polluted water. The accumulation of HMs by macro and microalgae is advantageous for phycoremediation compared to other approaches that are not economical and not environmentally friendly. So, there is an urgent necessity to refine the chances of accumulation of HMs in algae, employing the techniques of genetic engineering to create transgenic species for over-expressing metallothioneins and phytochelatins, which may form complexes with HMs and store them in vacuoles to make the maximum use of phytoaccumulation while also removing hazardous metals from the aquatic habitats. This review outlines the major sources of HMs, their adverse effects on humans, the potential of algae in phytoremediation (called phycoremediation), and their uptake mechanism of HMs.
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Starodub, M. E., P. T. S. Wong, C. I. Mayfield, and Y. K. Chau. "Influence of Complexation and pH on Individual and Combined Heavy Metal Toxicity to a Freshwater Green Alga." Canadian Journal of Fisheries and Aquatic Sciences 44, no. 6 (June 1, 1987): 1173–80. http://dx.doi.org/10.1139/f87-140.

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The effect of complexation and pH on heavy metal (Cu, Zn, Pb) toxicity to a freshwater green alga, Scenedesmus quadricauda, was investigated. Extracellular ligands produced by S. quadricauda were capable of binding heavy metals and reducing their single and combined toxicities. Apparent complexing capacities and the ability of the sediment humics and artificial complexing agents such as ethylenediaminetetraacetic acid (EDTA), citric acid, and glycolic acid to ameliorate Cu, Zn, or Pb toxicity were also assessed. The toxicity of metals to algal growth was enhanced at acidic pH. Combined toxicity of these metals was significantly greater at pH 4.5 than at pH 8.5 or pH 6.5. Synergistic effects (between Cu, Zn, and Pb) towards algal growth increased at low pH. Specific heavy metals, their respective concentrations, the presence of complexing ligands, and pH influence both individual and combined heavy metal toxicities.
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JONES, A. LESLEY, and JOHN L. HARWOOD. "Effects of heavy metals on lipid metabolism in marine algae." Biochemical Society Transactions 16, no. 3 (June 1, 1988): 275–76. http://dx.doi.org/10.1042/bst0160275.

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Більше джерел

Дисертації з теми "Algae Effect of heavy metals on"

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Linnane, Kevin. "The effects of heavy metals on marine algae - animal interactions." Thesis, University of Newcastle Upon Tyne, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.440576.

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Nightingale, Leigh. "The toxic effect of heavy metals on algal biomass (Spirulina sp.) and carbonic anhydrase activity, an enzyme which is central to algal application in metal precipitation." Thesis, Rhodes University, 2004. http://hdl.handle.net/10962/d1007858.

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Acid rmne drainage (AMD) is a major pollution problem througbout the world, adversely affecting both surface and groundwaters. AMD is principally associated with the mining of sulphide ores. The most commonly associated minerals being sulphur, copper, zinc, silver, gold, lead and uranium. As conventional methods for removing heavy metals from wastewater are often prohibitively expensive, the implementation of biological processes for the removal of heavy metals has become a realistic practice. The objectives of this project was firstly to establish the effect of copper, lead and nickel, heavy metals commonly found in AMD waters, on the enzyme carbonic anhydrase, which is an integral part of the carbon concentrating mechanism (CCM) and secondly, to determine the feasibility of using the alkalinity generated by Spindina for the precipitation of heavy metals from solution. Initially, batch flask experiments were performed and it was found that the algae were able to utilise the bicarbonate supplied in the medium, under CO, limiting conditions, through the induction of their CCM, resulting in the generation of carbonate. The effect of the inhibitors, acetazolamide (AZ) and ethoxyzolamide (EZ), were also investigated in order to determine the importance of carbonic anhydrase (CA) in inorganic carbon accumulation and photosynthesis. Results obtained were consistent with those observed in literature and it was found that at IOOf.LM AZ and EZ, complete inhibition of photosynthesis and carbonic anhydrase occurred, with no oxygen being evolved. The results obtained from the inhibitor experiments substantiate the findings that carbonic anhydrase is an important part of the CCM, and that the dehydration of bicarbonate to carbon dioxide and hydroxide ions, is in fact an enzymatic process regulated by the enzyme carbonic anhydrase and is essential for efficient photosynthesis. The effect of heavy metals on Spirulina was also investigated. Lead, copper and nickel were all found to cause a reduction in the synthesis of chlorophyll a, which resulted in a decrease in photosynthetic efficiency and eventually death of the culture. The morphology of the algae was also severely affected by heavy metals, with degradation and aJmost complete disintegration of the algal filaments occurring. Using the Wilbur-Anderson assay method, carbonic anhydrase activity was found to be lower in the experimental flasks containing heavy metals, than the control flasks, reducing the algae's ability to utilise the bicarbonate in solution for effective photosynthesis. The Wilbur-Anderson assay method did not prove to be a reliable method for measuring changes in enzyme activity as results were found to be erratic. Therefore attempts were made to use an oxygen electrode as an alternative method for determining the effects of various parameters on enzyme activity and photosynthesis, this proved to be more successful. Because of the toxic effects of heavy metals on Spirulina it was decided that the use of the biogenic alkalinity generated by the algae for the precipitation of heavy metals may be successfully employed as an alternative method for bioremediation and metal recovery. Carbonate reacts readily with metals, therefore the carbonate produced by this algal system was used for the precipitation of metals. It was possible to categorise the precipitation reactions observed into three groups, namely those metals which, a) precipitate as hydroxides, b) precipitate as carbonates generated from the dissociation of bicarbonate and c) metals which can only precipitate if there is free carbonate present in solution.
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Wong, Nga Cheung. "Effects of algae (Isochrysis galbana) and humic acids on copper toxicity to polychaete (Hydroides elegans) larvae." HKBU Institutional Repository, 2005. http://repository.hkbu.edu.hk/etd_ra/665.

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Butler, Reece. "Effect of Heavy Metals Found in Flue Gas on Growth and Lipid Accumulation for Green Algae Scenedesmus obliquus." DigitalCommons@USU, 2011. https://digitalcommons.usu.edu/etd/1159.

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This study evaluated the effect of several heavy metals that are present in flue gases on the algae, focusing on the growth and accumulation of lipids in the algae that can be converted to biodiesel. Concentrations for the heavy metals were calculated based on literature and assumptions. Metals were tested individually first at the highest concentrations that might be present (reference concentrations). The metals and their reference concentrations were: arsenic at 1.56 mg/L, cadmium at 0.3 mg/L, chromium at 2.6 mg/L, cobalt at 0.32 mg/L, copper at 2.62 mg/L, lead at 1.09 mg/L, nickel at 5.08 mg/L, mercury at 0.2 mg/L, selenium at 0.2 mg/L, and zinc at 8.8 mg/L. At these concentrations, most of the metals had a negative effect on the growth and lipid content of the algae. All of the metals were then tested at lower concentrations. At 1/20 the reference concentrations, the metals enhanced growth as well as lipid accumulation in the algae. At higher concentrations there was a negative effect.
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Rhora, Jennifer. "Effect of Chromium VI on the Production and Behavior of Lytechinus variegatus (Echinodermata: Echiniodea)." Scholar Commons, 2005. https://scholarcommons.usf.edu/etd/833.

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Small amounts of chromium (VI) are carcinogenic in mammals. Concentrations of Cr in marine algae and seagrasses range from 0.06-7.17 /g DW and 0.1-30.6 g/g DW respectively. To test for an effect of these concentrations, production (change in organic material), righting response, feeding rates, absorption efficiency and fecal production were measured in Lytechinus variegatus from Sarasota fed prepared diets containing 0, 4.1, and 32g Cr/ g DW and individuals from Ft. DeSoto fed diets containing 0, 41 and 82g Cr/ g DW. The urchins were fed for 4-5 weeks, with weekly measurements of their feeding rates, absorption efficiency and fecal production. At the end of the experiment the urchins were righted to note any changes in behavior. Their gonads, gut, lantern and test with spines were weighed and ashed to calculate gonadal and gut indices and inorganic and organic percentage and content. After five weeks individuals in all treatments from experiment one showed no significant results. Urchins in all treatments from experiment two showed a significant decrease Individuals in all treatments had a significant increase in wet (P<0.001) and dry (P=0.005) weights as well as total organic material (P<0.001) in the gut of the urchins recieveing 82µg Cr/ g DW. There was significant decrease in the feeding rate (P<0.001) and absorption efficiency (P<0.001), countered by a significant increase in fecal production. The righting times were significantly different between the 0µg Cr/ g dry weight, 82µg Cr/ g DW and initial (P=0.031), but not the 41µg Cr/ g DW. Chromium in the feed at the concentrations used in this experiment does not affect the production or absorption efficiency of Lytechinus variegatus, but it does affect feeding rates, fecal production and righting response.
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Udeozor, Jude Onyeka, and Jude Onyeka Udeozor. "Application of Industrial Wastewater Effluent in Growth of Algae -- Effects of Heavy Metals on the Growth Rate, Fatty Acid and Lipid Content of Chlorella Sorokiniana and Scenedesmus Obliquus." Thesis, The University of Arizona, 2017. http://hdl.handle.net/10150/626388.

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Growing interest in biofuel production from non-fossil fuel sources has resulted in several studies exploring different raw material sources as feedstock, including many algae species, for large-scale production of biofuel. Algae are promising feedstock due to advantages such as its short growth cycle, high biomass production, and lipid content. However, there are still challenges to overcome in order to use algae for commercial biofuel production. One of these challenges is the requirement for a large quantity of water and nutrients needed for growing large quantities of the algae. This work explores a potential solution to this challenge by studying the possibility of using industrial wastewater to grow algae for biofuel production. However, many industrial wastewaters, including effluents from semiconductor processing plants, are known to contain heavy metals that are toxic to humans and the environment. In this work, the effects of four of such metals ions, As(V), As(III), Ga(III), and In(III) on Chlorella sorokiniana and Scenedesmus obliquus strains were studied. In particular, the heavy metal toxicity on the strains, effects on its growth rate, biomass yield, lipid content and fatty acid methyl esters (FAME) were studied. Also, the effect of controlling pH on growth rate, biomass yield, lipid content, and FAME was studied for Chlorella sorokiniana in the presence of Ga(III). The results of the study confirmed the toxicity of these metals on both strains. However, Ga(III) and In(III) had the highest effect, while As(V) showed the least toxicity to the strains, with Chlorella sorokiniana withstanding concentrations of As(V) as high as 140mg/L. The heavy metals were slightly more toxic to Scenedesmus obliquus compared to Chlorella sorokiniana. In addition, the heavy metals reduced the growth rate of both strains. High percent changes in growth rate (more than 50%) were seen in cultures containing Ga(III) and In(III). Furthermore, concentration measurements with Inductively Coupled Plasma Optical Emission Spectrometer (ICP) before, during, and at the end of the growth period, showed that Scenedesmus obliquus adsorbed higher amounts of the heavy metals compared to Chlorella sorokiniana. Microalgae biosorption of heavy metals limits its end use, hence making Scenedesmus obliquus a less favorable option for this study, but may be a better choice for wastewater treatment applications. The effects of the four metals on the lipid content and FAME profile of Chlorella sorokiniana were studied. The result showed an increase in Chlorella sorokiniana lipid content in the presence of In(III), but a decrease in the presence of As(V) and As(III). The heavy metals had effects on the strain’s FAME compositions. The fatty acid composition included C16:0, C16:1, C16:2, C16:3, C18:0, C18:1, ω-6, C18:2, ω-6, and C18:3, ω-3 accounting for more than 97% of the total FAME composition. Furthermore, controlling the pH of the culture in the presence of Ga(III) at 6.5 led to higher adsorption of the heavy metal, increase in lipid content, but no significant change in FAME composition.
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7

Beaugeard, Marie. "Biosorption of heavy metals by red algae (Palmaria palmata)." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=31190.

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The research presented in this thesis entailed an investigation of heavy metal uptake by Palmaria palmata, a red marine alga. The alga was dry and organically certified. The heavy metals of interest were those commonly found in the wastewaters of the printed wiring board industry, namely Cu2+Pb2+, Cd2+, Zn 2+ and Ni2+. The ultimate objective of the work was to determine whether or not the factors expected to influence the metal uptake to the greatest extent could be optimized within functional ranges, leading eventually to process design (beyond the scope of this thesis). These factors were pH, temperature, initial concentration of metal in aqueous solution, and contact time. A number of preliminary experiments were performed to establish a basis for the design of the optimization studies.
Although it was not possible to adequately define optimal regions of operation for the biosorption of heavy metals by Palmaria palmata , general trends were elucidated, and the limitations of the methodology used were clarified. (Abstract shortened by UMI.)
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Alexander, Leslie M. "Some effects of copper and cadmium on Enteromorpha intestinalis (L.) Link." Thesis, Heriot-Watt University, 1987. http://hdl.handle.net/10399/1014.

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9

Whiston, Andrew James. "Uptake of heavy metals by marine microalgae, with a view towards wastewater detoxification." Thesis, University of St Andrews, 1997. http://hdl.handle.net/10023/14212.

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Treatment of waste water by freshwater microalgae is rapidly becoming a popular sewage treatment practice throughout the world, but only a few studies have been made into the use of marine strains or of their potential for heavy metal removal. This study examines the heavy metal tolerance of a range of marine microalgal species and examines some of the biological processes involved in metal uptake. Initially over 350 marine microalgal species/isolates were screened for (a) growth in the presence of heavy metals (10 ppm), (b) growth in the presence of wastewater (1:1 sewage : seawater), and (c) heavy metal uptake. Of the microalgae examined, only one isolate, Tetraselmis sp. (TSAW92) was found to satisfy all of the screening conditions. Metal uptake was found to be a biphasic process, with an initial rapid saturable metabolism-independent stage followed by a slower nonsaturable metabolism-dependent stage. Using a novel filtration technique metal uptake was measured at ten second intervals. The results show that most of the metal uptake occurs within one minute after exposure. The second stage of metal uptake was found to be associated with the extracellular release of up to three copper binding proteins of ca. 28, 30, 55 kDa. Protein release was specifically induced by the presence of heavy metals and was not due to metal mediated increases in cell membrane permeability. Two practical applications of Tetraselmis sp. (TSAW92) metal uptake were investigated. First dried biomass was evaluated in a simple packed column. Second, live cells were grown on a wastewater treatment raceway (2m), upstream of a Dunaliella salina stocked nutrient removal raceway. Dried Tetraselmis sp. (TSAW92) was capable of removing copper from a 1:1 seawater : sewage solution to a final loading of 30% at an efficiency of approaching 100%. Over four weeks live TSAW92 removed 100% of the applied copper to a final loading of 37%, and, after the second stage, the raceway was found to remove 95% of the applied nitrogen and 87% of the applied phosphorus. This thesis shows that marine microalgae are capable of removing heavy metals from wastewater in vitro, on raceways, and as dried biomass. Live marine microalgae on raceways were further found to remove inorganic nutrients (nitrogen and phosphorous). In addition work is presented which suggests that copper uptake by the marine chlorophyte Tetraselmis sp. (TSAW92) is mediated through extracellular copper binding proteins.
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Wainaina, Steven. "Effect of heavy metals on syngas fermentation." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-10203.

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The goal of this work was to establish the suitable and limiting concentrations of Zn, Cu and Mn compounds during syngas fermentation. The results showed that cells encased in polyvinylidene difluoride (PVDF) membranes had a faster accumulation of methane in reactors containing fermentation medium dosed with 5 mg/L of each heavy metal compared to free cells. It was also revealed that total inhibition of biohydrogen production occurred in medium containing 5 mg/L Cu, 30 mg/L Zn and 140 mg/L Mn while the most suitable metal concentration level was 0.1 mg/L Cu, 0.6 mg/L and 2.8 mg/L Mn. In addition, a comparison test showed that for the most suitable metal concentration in the medium, rate of performance at pH 6 and 7 was higher than at pH 5.
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Книги з теми "Algae Effect of heavy metals on"

1

Sears, James R. Use of benthic seaweeds to monitor heavy metals at selected sites in Buzzards Bay, adjacent estuaries, and New Bedford Harbor, Massachusetts. Westborough, Mass: Massachusetts Dept. of Environmental Protection, Division of Water Pollution Control, Technical Services Branch, 1990.

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service), SpringerLink (Online. Soil Heavy Metals. Berlin, Heidelberg: Springer-Verlag Berlin Heidelberg, 2010.

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Furini, Antonella. Plants and heavy metals. Dordrecht: Springer, 2012.

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service), SpringerLink (Online, ed. Cellular Effects of Heavy Metals. Dordrecht: Springer Science+Business Media B.V., 2011.

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5

Farrell, Anthony Peter, Chris M. Wood, and Colin J. Brauner. Homeostasis and toxicology of non-essential metals. Amsterdam: Academic Press, 2012.

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Antonio Carlos A. da Costa. Batch and continuous heavy metals biosorption by a brown seaweed. Rio de Janeiro, RJ, Brasil: MCT, CNPq, CETEM, 1996.

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Antonio Carlos A. da Costa. Batch and continuous heavy metals biosorption by a brown seaweed. Rio de Janeiro, RJ, Brasil: MCT, CNPq, CETEM, 1996.

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8

Vorobʹev, V. I. Biogennai͡a migrat͡sii͡a ti͡azhelykh metallov v organizme russkogo osetra (Acipenser Guldenstadti Brandt): Monografii͡a. Astrakhanʹ: T͡SNTĖP, 2007.

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Trüby, Peter. Zum Schwermetallhaushalt von Waldbäumen. Freiburg im Breisgau: Institut für Bodenkunde und Waldernährungslehre, 1994.

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Homeostasis and toxicology of non-essential metals. Amsterdam: Academic Press, 2012.

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Частини книг з теми "Algae Effect of heavy metals on"

1

Ahlf, Wolfgang, Wolfgang Calmano, and Ulrich Förstner. "The Effects of Sediment-Bound Heavy Metals on Algae and Importance of Salinity." In Sediments and Water Interactions, 319–24. New York, NY: Springer New York, 1986. http://dx.doi.org/10.1007/978-1-4612-4932-0_26.

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Sharma, Chitra, Sunil Kumar, Nitika Bhardwaj, S. K. Mandotra, and A. S. Ahluwalia. "Mitigation of Heavy Metals Utilizing Algae and Its Subsequent Utilization for Sustainable Fuels." In Algae, 41–62. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-7518-1_3.

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Talapatra, Namita, Vaishali Mittal, Tushar Kanti Maiti, and Uttam Kumar Ghosh. "Algae-Based Biosorbent for Removal of Heavy Metals." In Encyclopedia of Green Materials, 1–7. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-4921-9_39-1.

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Aksu, Zümriye. "Biosorption of Heavy Metals by Microalgae in Batch and Continuous Systems." In Wastewater Treatment with Algae, 37–53. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-662-10863-5_3.

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Bulgariu, Laura, and Dumitru Bulgariu. "Bioremediation of Toxic Heavy Metals Using Marine Algae Biomass." In Green Materials for Wastewater Treatment, 69–98. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-17724-9_4.

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Lupsor, Simona, Gabriela Stanciu, Dan Epure, and Elisabeta Chirila. "Heavy Metals and Pesticides Analysis from Black Sea Algae." In Exposure and Risk Assessment of Chemical Pollution — Contemporary Methodology, 431–37. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-2335-3_34.

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Chandra Shekharaiah, P. S., Debanjan Sanyal, Santanu Dasgupta, Ajit Sapre, and Avishek Banik. "Heavy Metal Mitigation with Special Reference to Bioremediation by Mixotrophic Algae-Bacterial Protocooperation." In Cellular and Molecular Phytotoxicity of Heavy Metals, 305–34. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-45975-8_15.

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Baldrian, Petr. "Effect of Heavy Metals on Saprotrophic Soil Fungi." In Soil Biology, 263–79. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-02436-8_12.

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Pal, S. C. "Effect of heavy metals on legume-Rhizobium symbiosis." In Biological Nitrogen Fixation Associated with Rice Production, 21–29. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-015-8670-2_3.

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Rengifo-Gallego, Ana Lucia, and Enrique Javier Peña Salamanca. "Interaction Algae–Bacteria Consortia: A New Application of Heavy Metals Bioremediation." In Phytoremediation, 63–73. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-10969-5_6.

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Тези доповідей конференцій з теми "Algae Effect of heavy metals on"

1

Thakare, Ketan, Laura Jerpseth, Hongmin Qin, and Zhijian Pei. "Preliminary Investigation of Removing Copper Contamination From Water Using Algae." In ASME 2020 15th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/msec2020-8521.

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Abstract Drinking water contaminated with metal ions can cause negative health effects in humans. Acute heavy metal poisoning can cause such symptoms as vomiting and fainting, while chronic heavy metal poisoning can lead to organ failure and death. It has previously been shown that concentration of metal ions in water solution was decreased by algae. This paper reports a study to examine the ability of two Chlamydomonas reinhardtii algae strains to remove copper ions from water solution. Chlamydomonas reinhardtii was chosen for this study because it is easy to culture, and can be used to generate strains with a higher efficiency to remove metals. In this study, the three-factor, two-level full factorial design was used to conduct experiments. Three factors were algae strain, initial copper concentration, and exposure time. Two levels of the algae strain are: cc125 — the Chlamydomonas reinhardtii strain found commonly in the wild, and AGG1 — an experimentally modified Chlamydomonas reinhardtii strain. Two levels of initial copper concentration and exposure time were 1.5 and 3 ppm, and 2.5 and 5 hours, respectively. Copper concentration in the water solution after experiments was measured using inductively coupled plasma-mass spectrometry, or ICP-MS. Statistical analysis showed that algae strain was the only factor that significantly affected percentage decrease in copper concentration, at the significance level of 0.05. The cc125 strain decreased copper concentration more efficiently than the AGG1 strain. The cc125 strain decreased copper concentration by 97% for the water solution with an initial copper concentration of 1.5 ppm, and by 90% for the solution with an initial copper concentration of 3 ppm. Copper concentrations of all solutions treated by the cc125 strain were below the Environmental Protection Agency pollution threshold level of 1.3 ppm.
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Velan, M., and K. Kayalvizhi. "Biosorption of heavy metals using fresh water algae." In 2011 International Conference on Green Technology and Environmental Conservation (GTEC 2011). IEEE, 2011. http://dx.doi.org/10.1109/gtec.2011.6167655.

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Qin, Linbo, Jun Han, Guanghui Wang, and Hongbing Chang. "Study the Effect Combustion Condition Effect on Heavy Metals Emission." In 2010 4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2010. http://dx.doi.org/10.1109/icbbe.2010.5516623.

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Negreanu-Pirjol, Ticuta. "MICRO-, MACROELEMENTS AND HEAVY METALS IN THE ALGAE COMPONENT OF A NEW BIOSTIMULATOR-REGENERATOR FOR GRAPEVINE SOILS." In 19th SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings. STEF92 Technology, 2019. http://dx.doi.org/10.5593/sgem2019v/6.3/s08.019.

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Casanova, Felix. "Tuning the spin Hall effect in heavy metals (Conference Presentation)." In Spintronics XI, edited by Henri Jaffrès, Henri-Jean Drouhin, Jean-Eric Wegrowe, and Manijeh Razeghi. SPIE, 2018. http://dx.doi.org/10.1117/12.2322370.

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Lin, Hua, Ming Huang, and Haitao Huang. "Effect of Temperature on Bioleaching Heavy Metals from Sewage Sludge." In 2010 4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE 2010). IEEE, 2010. http://dx.doi.org/10.1109/icbbe.2010.5518083.

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Zhang, Yanhao, Fohua Zhong, Siqing Xia, and Xuejiang Wang. "Effect of Initial Nitrate Concentrations and Heavy Metals on Autohydrogenotrohic Denitrification." In 2009 3rd International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2009. http://dx.doi.org/10.1109/icbbe.2009.5162696.

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Liao, S. B., and J. H. Ma. "Study on environmental effect of land cover on soil heavy metals." In International Conference on Environmental Science and Biological Engineering. Southampton, UK: WIT Press, 2014. http://dx.doi.org/10.2495/esbe140011.

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Zhang, Shaohui, and Yumei Hua. "Effect of organic acid on heavy metals removal from sewage sludge." In 2011 Second International Conference on Mechanic Automation and Control Engineering (MACE). IEEE, 2011. http://dx.doi.org/10.1109/mace.2011.5987393.

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Gao, Taizhong, Liu Yang, and Huicong Pang. "Effect of Dissolved Organic Matter on Migration of Heavy Metals in Soils." In 2010 International Conference on Multimedia Technology (ICMT). IEEE, 2010. http://dx.doi.org/10.1109/icmult.2010.5631015.

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Звіти організацій з теми "Algae Effect of heavy metals on"

1

De, G. C., and B. Pesic. Effect of Heavy metals on the iron oxidizing ability of Thiobacillus ferrooxidans: Part 1, Effect of silver. Office of Scientific and Technical Information (OSTI), January 1992. http://dx.doi.org/10.2172/7010600.

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De, G. C., and B. Pesic. Effect of Heavy metals on the iron oxidizing ability of Thiobacillus ferrooxidans: Part 1, Effect of silver. Technical progress report, July 1992--September 1992. Office of Scientific and Technical Information (OSTI), December 1992. http://dx.doi.org/10.2172/10104137.

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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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Banin, Amos, Joseph Stucki, and Joel Kostka. Redox Processes in Soils Irrigated with Reclaimed Sewage Effluents: Field Cycles and Basic Mechanism. United States Department of Agriculture, July 2004. http://dx.doi.org/10.32747/2004.7695870.bard.

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The overall objectives of the project were: (a) To measure and study in situ the effect of irrigation with reclaimed sewage effluents on redox processes and related chemical dynamics in soil profiles of agricultural fields. (b) To study under controlled conditions the kinetics and equilibrium states of selected processes that affect redox conditions in field soils or that are effected by them. Specifically, these include the effects on heavy metals sorption and desorption, and the effect on pesticide degradation. On the basis of the initial results from the field study, increased effort was devoted to clarifying and quantifying the effects of plants and water regime on the soil's redox potential while the study of heavy metals sorption was limited. The use of reclaimed sewage effluents as agricultural irrigation water is increasing at a significant rate. The relatively high levels of suspended and, especially, dissolved organic matter and nitrogen in effluents may affect the redox regime in field soils irrigated with them. In turn, the changes in redox regime may affect, among other parameters, the organic matter and nitrogen dynamics of the root zone and trace organic decomposition processes. Detailed data of the redox potential regime in field plots is lacking, and the detailed mechanisms of its control are obscure and not quantified. The study established the feasibility of long-term, non-disturbing monitoring of redox potential regime in field soils. This may enable to manage soil redox under conditions of continued inputs of wastewater. The importance of controlling the degree of wastewater treatment, particularly of adding ultrafiltration steps and/or tertiary treatment, may be assessed based on these and similar results. Low redox potential was measured in a field site (Site A, KibutzGivat Brenner), that has been irrigated with effluents for 30 years and was used for 15 years for continuous commercial sod production. A permanently reduced horizon (Time weighted averaged pe= 0.33±3.0) was found in this site at the 15 cm depth throughout the measurement period of 10 months. A drastic cultivation intervention, involving prolonged drying and deep plowing operations may be required to reclaim such soils. Site B, characterized by a loamy texture, irrigated with tap water for about 20 years was oxidized (Time weighted average pe=8.1±1.0) throughout the measurement period. Iron in the solid phases of the Givat Brenner soils is chemically-reduced by irrigation. Reduced Fe in these soils causes a change in reactivity toward the pesticide oxamyl, which has been determined to be both cytotoxic and genotoxic to mammalian cells. Reaction of oxamyl with reduced-Fe clay minerals dramatically decreases its cytotoxicity and genotoxicity to mammalian cells. Some other pesticides are affected in the same manner, whereas others are affected in the opposite direction (become more cyto- and genotoxic). Iron-reducing bacteria (FeRB) are abundant in the Givat Brenner soils. FeRB are capable of coupling the oxidation of small molecular weight carbon compounds (fermentation products) to the respiration of iron under anoxic conditions, such as those that occur under flooded soil conditions. FeRB from these soils utilize a variety of Fe forms, including Fe-containing clay minerals, as the sole electron acceptor. Daily cycles of the soil redox potential were discovered and documented in controlled-conditions lysimeter experiments. In the oxic range (pe=12-8) soil redox potential cycling is attributed to the effect of the daily temperature cycle on the equilibrium constant of the oxygenation reaction of H⁺ to form H₂O, and is observed under both effluent and freshwater irrigation. The presence of plants affects considerably the redox potential regime of soils. Redox potential cycling coupled to the irrigation cycles is observed when the soil becomes anoxic and the redox potential is controlled by the Fe(III)/Fe(II) redox couple. This is particularly seen when plants are grown. Re-oxidation of the soil after soil drying at the end of an irrigation cycle is affected to some degree by the water quality. Surprisingly, the results suggest that under certain conditions recovery is less pronounced in the freshwater irrigated soils.
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