heavy metals contamination Articles
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Heavy metal contamination in water and sediments of an estuary in southeastern Turkey
The geochemical characteristics of some heavy metals (Cr, Cd, Pb, Zn and Ni) in the river and sea sediments, in the soil and in the river and groundwater of an estuary on the southeast coast of Turkey have been studied. In the sea sediments, the wastes from a chromium factory control these metal concentrations. The heavy metal contamination in the river sediments results from an existing chromite ...
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White clover nodulation index in heavy metal contaminated soils– a potential bioindicator
Received for publication January 10, 2008. The morphological effects of heavy metal stress on the nodulation ability of Rhizobium spp. and growth of white clover (Trifolium repens L.) were studied in the laboratory under controlled conditions. Fourteen topsoils were collected from an area with elevated metal concentrations (Cd, Zn, and Pb). White clover was cultivated using a specialized ...
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Removing Heavy Metal Contamination in Wastewater Using Clinoptilolite Zeolite
Research shows that natural zeolite can remove trace heavy metals from the wastewater of ink and pigment production, which can mitigate the toxic pollution into waterways. Most inks and dyes used in the printing industry contain trace heavy metals. These elements, when released into the environment during manufacturing, pose severe health risks to humans and wildlife. The heavy metals found in ...
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Monitoring and assessing heavy metals in topsoils as potential diffuse pollutants in the Pyeongchang River Basin, Korea
Topsoils, mainly from crop fields, orchards, forests, and barns around the Pyeongchang River, were collected to investigate their heavy metal concentrations. Pollution load index, ecological risk index, and enrichment factor were applied to assess levels of heavy metal contamination for topsoils. The concentrations of cadmium (Cd) (1.7 mg/kg) and chromium (Cr) (4.1 mg/kg) exceeded the troublesome ...
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Heavy Metals Contaminated Soils Site Characterization
What is Heavy Metals Contaminated Soils Site Characterization? The EPA requires a Toxicity Characteristic Leaching Procedure (TCLP, EPA Method 1311) test to characterize heavy metals contaminated soils and determine how they should be disposed. Soils exhibiting hazardous characteristics, typically leaching metals at greater than 5.0 mg/L, need to be disposed of at a permitted hazardous waste ...
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Effect of warfare waste on soil: a case study of Gallipoli Peninsula (Turkey)
Gallipoli is a small town on the European side of the Dardanelles Strait, in Turkey. More than 450,000 soldiers gave their lives on the Gallipoli Peninsula (Gallipoli Campaign) over a nine-month period during World War I. In that war, many naval and landing bombs were exploded. The ingredients of these bombs may cause heavy metal contamination in soils. An environmental geochemical investigation ...
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Heavy metal pollution of soils along North Shuna-Aqaba Highway, Jordan
Attention to heavy metal contamination associated with highways or motorways has risen in the last decades because of the associated health hazards and risks. The present study analysed the metal content in soil samples of one of the main highways along the western part of the Jordanian border, the North Shuna–Dead Sea–Aqaba Highway. The metals analysed were Pb, Zn, Cd, Co and Ni. In the samples ...
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Risk assessment of heavy metal contaminated soil in the vicinity of a lead/zinc mine
Heavy metal contamination of soils through anthropogenic activities is a widespread and serious problem confronting scientists and regulators throughout the world. In this study we investigated the distribution, chemical species and availability of lead, zinc, cadmium and copper in nine surface (0 to 20 cm) soils from near an abandoned lead/zinc mine tailings located in Shaoxing, Zhejiang, China. ...
By IOS Press
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A novel approach to remediating contaminated groundwater by reusing industrial co-products
This paper presents a novel approach to remediating contaminated groundwater by utilising industrial co-products. The materials discussed include paper clay and steel slag, and the primary water contamination considered is heavy metal contamination. Paper clay was determined to have the potential for adsorbing heavy metals, and in compacted form could achieve permeability values within the ...
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Spatial Analysis and Geographical Distribution of Heavy Metal Contamination in Urban House Water Reservoirs at Khamis Mushait City, Assir, Saudi Arabia
To determine the most common heavy metals in the different water reservoirs used for drinking water supply in houses located at Khamis Mushait city, Saudi Arabia (see Map1 and; (Fig.1-6, Table 1,2), Maps 2-10). To compare the results of the determined heavy metals with the standards set by Saudi Arabia Standards Organization and other international regulatory standards (Table 3). The ...
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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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Sorption of heavy metals in the biomass of alga
Palmaria palmata Sorption of heavy metals by the sea alga Palmaria palmata was investigated in laboratory conditions. The sorption process of the analytes was carried out with constant flow of the solutions through the algae samples. The Langmuir isotherm model was used to describe equilibria. The experiments confirmed that 50 min of exposure of algae with little heavy metal contamination in contaminated waters ...
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Heavy metal contamination from electronic waste recycling at Guiyu, southeastern China
This study evaluated the effect of electronic waste (e-waste) recycling activities at a regional center, Guiyu, Guangdong, China on heavy metal pollution in the surrounding waterway system. Surface water and sediment collected from the Lianjiang River and its tributaries were analyzed for concentrations of Cu, Pb, Ni, Cd, Hg, and As. Spatially, heavy metals in water and sediment samples decreased ...
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Identification of source of heavy metal contamination in a site - a case study
Accidental spills and improper disposal of industrial effluent/sludge containing heavy metals onto the open land or into subsurface result in soil and water contamination. Detailed investigations are carried out to identify the source of contamination of heavy metals in an industrial suburb near Bangalore in India. Detailed investigation of ground water and subsurface soil analysis for various ...
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University of Southampton, Heavy Metal Contamination in Soils– Case Study
Project Highlights Over the last 15 years, Envirochem have for-filled the role of environmental consultant analysts to the University of Southampton. During a period of significant redevelopment, Envirochem has assisted with a whole range of projects supplying an exhaustive range of asbestos related services, chemical sampling and occupational hygiene analysis. Our close working relationship ...
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Occurrence of heavy metals and contaminants on the surface of adjacent rivers
Water is fundamental to the survival of living beings. It registers every impact and can function as an indicator of environmental stressors. Our objective in the current study was to assess the sanitary conditions of the waters in the Açude, Maria Lucinda and Santa Rosa streams. This was done by checking pH, running quantitative analyses of heavy metals and testing for total coliforms. The ...
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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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ANDalyze - Real Time Testing for Heavy Metals - Whitepaper
Whitepaper on DNAzyme heavy metals testing technology. Water pollution is a worldwide problem affecting developing and developed countries alike. Heavy metal contaminants are one prevalent type of water pollutant. They are persistent in the environment once discharged and removal from source waters is necessary to ensure a clean drinking water supply. The problem of heavy metal pollution arises ...
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Removal of heavy metals (Cr, Cd, Ni and Pb) using fresh water algae (Utricularia tenuissima, Utricularia tenuis & Zygogonium ericetorum) from contaminated water
A study was conducted to check the efficiency of different fresh water algae for removing heavy metals (Cr, Cd, Ni and Pb) from contaminated water. The three most abundant indigenous algal species namely Ulothrix tenuissima, Oscillatoria tenuis and Zygogonium ericetorum were collected from fresh water channels of Parachinar, Pakistan and brought to the laboratory of Soil and Environmental ...
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Heavy metal accumulation in different parts of trees grown on sewage sludge
Sewage sludge is a rest product deriving from the wastewater treatment plants. It is rich in nutrients and essential elements. Therefore sludge on-land utilisation can create an added value by recovering energy from biomass produced on marginal lands. However, widespread on-land recycling of sewage sludge might be limited due to high heavy metal content. Health organisations show an increasing ...
By Biovala
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