heavy metals contamination Articles
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Heavy Metal Contaminated Waste Streams
Carpenter Brothers, Inc. is distributor of TDJ Group’s Bantox® & Blastox® products, through their subsidiary J Carpenter Environmental. These products serve to stabilize various types of ferrous and non-ferrous foundry waste streams that have heavy metal contamination. Carpenter Brothers invited James A. Lively, VP of Sales & Marketing to speak at the North East ...
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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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Contamination levels assessment of heavy metals in road dust deposited in various types of urban traffic: a case study of Hassi Messaoud City (Algeria)
This study identified the levels and sources of heavy metal contamination in road dust from busy traffic areas in Hassi Messaoud, Algeria. A total of 13 sampling sites, including three traffic rotaries, tow highways, three downtown areas, four circulation roads and one background area, were selected for this study. The contamination levels of the heavy metals in the road dust were evaluated ...
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Behaviour of bacterial extracellular polymeric substances from activated sludge: a review
Extracellular Polymeric Substances (EPS) are the predominant constituents of activated sludge and dramatically affect its properties. As EPS constitute as much as 50?90% of the solid phase of sludge, the use of EPS may bring a great reduction in sludge volume and mass, which have been great environmental interest. In this paper, results of over 60 publications related to structure, composition, ...
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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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In-Situ Treatment Case Study
Jeep Parkway – Toledo, OhioTreated the soil in situ down to 20 feet. Removal of several unknown concrete structures, removal and disposal of more than 4,000 tons of PAH and heavy metal contaminated soil, collected over 200 soil samples and water samples, and moved 7,000 cubic yards of onsite borrow to fill and cap the area. Environmental Remediation Contractor is a force for nature. We are a ...
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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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Bioremediation of heavy metal contaminated aqueous solution by using red algae Porphyra leucosticta
Bioremediation is an effective process for the removal and recovery of heavy metal ions from aqueous solutions. In this study, red algae Porphyra leucosticta was examined to remove Cd(II) and Pb(II) ions from wastewater through biological enrichment and biological precipitation. The experimental parameters that affect the bioremediation process such as pH, contact time and biomass dosage were ...
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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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A biomonitoring study: trace metals in seagrass, algae and molluscs in a marine reference ecosystem (Southern Tyrrhenian Sea)
Marine organisms were tested as possible biomonitors of heavy metal contamination in Ustica (island of the Southern Tyrrhenian Sea). The concentrations of Cd, Cr, Cu, Pb and Zn were measured in the phanerogam Posidonia oceanica L. Delile, the two brown algae Padina pavonica (L.) Thivy and Cystoseira sp., and the two gastropod molluscs Monodonta turbinata Born and Patella caerulea L. collected at ...
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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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