water heavy metal Articles
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Winter exposure assessment of copper, zinc and arsenic in drinking water of inhabitants in Beijing, China
Human exposure to Cu, Zn and As from drinking water in Beijing, China was estimated in winter. Cu, Zn and As were detected at 6.1, 400 and 0.6 µg/L on average in stagnant water, significantly different from those in the actually ingested boiled tap water, 5.1, 130 and 2.4 µg/L, respectively. Daily intake of Cu, Zn and As from drinking water was 0.8%, 7.7% and 28.5% of the minimum for adults ...
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An investigation into heavy metal variations in surface water sources of some villages around Kocaeli-Golcuk, Turkey
Natural spring resources, other fresh water and used water related to natural springs have an important influence in Turkey and elsewhere. The value of water resources can be affected by pollution of the water by organic, inorganic, heavy metal, radioactive and biological substances. The rapid increase in pollution in Golcuk, a town of Kocaeli in the Marmara Region, and its surrounding area, is ...
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Impact of AMD processes on the public water supply: hydrochemical variations and application of a classification model to a river in the Iberian Pyritic Belt S.W. Spain
The aim of this work is to formulate a rapid method for finding out the degree of water pollution in the field, based on the toxicity produced by sulfates and metals dissolved in solution, using simple pH measurement in rivers that undergo AMD processes and which flow into public water supply dams. A classification model based on the degree of the impact is proposed, which is applied to a river ...
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Bioaccumulation of heavy metals in organs of fresh water fish Cyprinus carpio (Common carp)
The objective of the present study is to determine the bioaccumulation of heavy metals in various organs of the fresh water fish exposed to heavy metal contaminated water system. The experimental fish was exposed to Cr, Ni, Cd and Pb at sublethal concentrations for periods of 32 days. The elements Cd, Pb, Ni and Cr were assayed using Shimadzu AA 6200 atomic absorption spectrophotometery and the ...
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Metal ions biosorption from dilute aqueous solution
Biosorption, using non-living biomass (mostly suspended), is briefly reviewed in this paper as applied to toxic metal ions removal, with particular focus on the kinetics and engineering considerations of the process. Several diverse kinetic models were successful in fitting the experimental data. Evidence was provided that the metal biosorption (on Aeromonas caviae biomass) is a complex process. ...
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Biosorption of Cu(II) and Zn(II) ions from aqueous solution by water hyacinth (Eichhornia crassipes)
The biosorption of Cu(II) and Zn(II) ions from aqueous solution by raw water hyacinth (RWH) and acid treated water hyacinth (TWH) was studied as a function of time, biosorbent dosage and pH. The kinetic results obeyed well the pseudo second–order model. Maximum biosorption capacities for RWH and TWH were measured as 0.49, 6.56 mg/g for Cu(II) and 2.66, 10.71 mg/g for Zn(II), respectively. FT–IR ...
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Removal of cadmium (Cd II) from polluted seawater
Cadmium is one of the heavy metals, highly toxic and non–degradable and, therefore, persistent. Discharges containing cadmium are controlled due to its high toxicity level and its tendency to accumulate in living organisms. The present article describes the use of coconut pith as adsorbents for removing cadmium from seawater. The method consists in preparing activated carbon from coir pith, which ...
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Water pollution study of the Shirvane and Nerul lakes situated at Nerul, Navi Mumbai, India
The areas of study selected in the present investigation are Shirvane and Nerul lakes situated at Nerul which is considered as the queen of Navi Mumbai, the city on the west coast of the Indian state of Maharashtra. The lake areas receive domestic raw sewage from surrounding habitation; so also the activities like cattle and cloth washing, bathing, religious activities like idol immersion etc. ...
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Sorption of thallium(I) ions by peat
The increasing industrial use of thallium has raised the need for removal of this highly toxic element from wastewater. Thallium is more toxic than cadmium, copper, zinc, lead and mercury and as it is easily accumulated in humans, animals and plants, it poses a threat to both the environment and human health. Peat has been used as an effective, relatively cheap and easily available sorbent to ...
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Biosorption of Pb(II) from synthetic wastewater onto Pseudomonas aeruginosa
The biosorption property onto Pseudomonas aeruginosa was represented by the Langmuir isotherm, and the maximum capacity of Pb(II) was 45 mg g−1 dry weight of bacteria at pH 5. The biosorption capacity of Pb(II) in a binary system increased with increasing Pb(II) concentration, from 0 to 50 mg l−1 in which Cr(III) existed at a constant concentration of 50 mg l−1. This result indicates that there ...
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ANDalyze DNA sensor Technology
Video describing the use of DNA as a sensor for detecting heavy metal ions in ...
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Developmental toxicity of treated municipal wastewater effluent on the Bombina orientalis (Amphibia: Anura) embryos
Amphibian populations have been decreasing in urban freshwater systems in Korea. To elucidate the biological safety of treated wastewater effluent (TWE) in the Tancheon basin, the capital area of Korea, 7 d exposure Bombina orientalis embryo developmental toxicity assay was examined during breeding season. In March, there were no significant differences in embryonic survival or malformation ...
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Adsorptive removal studies of lead(II) ions using functionalized silica
An adsorbent was prepared by the functionalization of 2-hydroxyacetophenone-3-thiosemicarbazone onto 3-aminopropyl silica by diazotation and characterized by Fourier transmission infra red spectrometry. The functionalized silica was evaluated for removal of lead(II) ions in aqueous solutions. The maximum adsorption capacity 385 μg/g was obtained with an initial concentration of 1,000 μg/L by the ...
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Pollution of south of Tehran ground waters with heavy metals
Abstract: The reuse of nutrients and organic matter in wastewater sludge via on agricultural lands application is a desirable goal. However, trace or heavy metals present in sludge pose the risk of human or phytotoxicity from land application. The aim of this research is possibility of ground water pollution of south of Tehran because of ten years irrigation with Ni, Cd and Pb borne waste water. ...
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Application: Heavy metals in industrial waste water
Today heavy metals in waste water are seen as one of the biggest problems of pollution. The attention of local governments to decrease the concentration of heavy metals in waste water is continuously increasing. The Problem: The online measurement of Industrial Waste Water introduces two technical problems to be solved. First, the complex waste water matrix will interfere with any accurate ...
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The effect of human activities on the pollution of water in southwest Giza area, Egypt
Southwest Giza area is one of the most complicated regions in Egypt because of the combination of agricultural, industrial and urbanization activities with few studies about water resources contamination with heavy metals. In this study, ten surface water samples and eight groundwater samples were collected and analyzed for pollution with Fe, Mn, As, Cr, Cd, Pb and Cu. The samples were ...
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ZLD of waste water containing heavy metal - Case Study
Jabil technology (chengdu) co., ltd. is a subsidiary of Jabil group, located in Chengdu, Sichuan province. Jabil group was founded in 1966, listed in the New York stock exchange center, and is one of the world's top 500 companies. The Chengdu plant covers an area of more than 1 million m2 and has more than ten thousand employees. When it is in full production, the Chengdu plant will become the ...
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Development of a GIS-based decision support tool and assessment of Nile River water quality
The objective of this paper is to develop and present a GIS-based and software tool capable of data management, data visualisation, and data analysis. The developed software is proved to be a good tool in the initial assessment of the quality status of the Nile river water quality. In addition a Graphical User Interface (GUI) was fully designed and implemented to make the GIS tool very easy and ...
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Integrated water resources management in central Asia: nutrient and heavy metal emissions and their relevance for the Kharaa River Basin, Mongolia
Within the framework of Integrated Water Resources Management (IWRM) the nutrient and heavy metal levels within the Kharaa river basin were investigated. By the application of the MONERIS model, which quantifies nutrient emissions into river basins, various point and diffuse pathways, as well as nutrient load in rivers, could be analysed. Despite seasonal variations and inputs of point sources ...
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High-performance cellulose acetate/polysulfone blend ultrafiltration membranes for removal of heavy metals from water
Neat cellulose acetate (CA) and CA/polysulfone (PSf) blend ultrafiltration membranes in the presence of polyvinylpyrrolidone as a pore former were prepared via a phase inversion technique. The prepared membranes were characterized by Fourier transform infrared, scanning electron microscopy, mechanical strength, water content, porosity, permeate flux and heavy metals (Pb2+, Cd2+, Zn2+ and ...
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