heavy metals remediation Articles
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Biosorption studies for the removal of ferrous ion from aqueous solution by
Aspergillus terreus andTrichoderma viride : kinetic, thermodynamic and isothermal parametersEnvironmental implications and the tendency of heavy metals to accumulate in selected tissues of plants and animals, as well as their overall potential to be toxic even at relatively minor levels of exposure, are a source of concern. The use of cheap and effective biological means for heavy metal remediation has been advocated. This study examines the biosorption and bioaccumulation of ferrous ...
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Imprinted polymers for the removal of heavy metal ions from water
In wastewater treatment, the removal of heavy metals is difficult due to the limited affinity of heavy metal ions to ion exchange resins. Here imprinting polymerization is used to develop resins with high capacity and selectivity for heavy metal ions for water treatment. A random copolymer of methacrylate and methacrylamide was found to be most effective for the removal of hydrophilic metal ...
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Lead remediation of contaminated water using Moringa Stenopetala and Moringa oleifera seed powder
Abstract: The increasing influx of heavy metals into water bodies from industrial, agricultural, and domestic activities is of global concern because of their well documented negative effects on human and ecosystem health. A recent study of streams in Blantyre and Zomba, Malawi revealed lead levels of up 0.118 mg/L, exceeding the World Health Organisation acceptable level of 0.01 mg/L. Our ...
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Permeable Adsorbing Barriers for groundwater remediation from hexavalent chrome pollution
Chrome ions removal from aqueous solutions by adsorption onto an activated carbon (Aquacarb 207EA by Sutcliffe Carbon) and a South African coal char is illustrated. Different chrome concentrations, pH and salinity levels are tested. Experimental data are interpreted by means of a Langmuir approach-based model. Results show that a Permeable Adsorbing Barrier (PAB) made of Aquacarb 207EA can ...
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Blastox Saved $1.4M on Heavy Metal Soil Remediation Project - Case Study
What is a Soil Remediation Project? A developer near Detroit, MI had a soil remediation project that involved a redevelop property with an ideal location with ready access to freeways. High levels of lead contamination were identified over a large portion of the site, presumed to be associated with areas that lead-acid batteries were crushed inside cars and were left to drain. ...
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Lead contamination in soil and groundwater in and around a lead processing industry: a case study
Environmental pollution is of major concern across the world, which is affected by a variety of contaminants. Lead is one of the major heavy metals used in industrial activity. Unscientific handling and disposal of lead bearing residues or lead waste has led to contamination of the surrounding soil and water environment. A detailed investigation of soil and groundwater was carried out in and ...
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Magnetic biochar combining adsorption and separation recycle for removal of chromium in aqueous solution
Biochar has been developed in recent years for the removal of contaminants such as Cr (VI) in water. The enhancement of the adsorption capacity of biochar and its recyclable use are still challenges. In this study, magnetic biochar derived from corncobs and peanut hulls was synthesized under different pyrolysis temperatures after pretreating the biomass with a low concentration of 0.5 M FeCl3 ...
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Environmental remediation of heavy metal ions from aqueous solution through hydrogel adsorption: a critical review
Heavy metal ions such as Cd2+, Pb2+, Cu2+, Mg2+, and Hg2+ from industrial waste water constitute a major cause of pollution for ground water sources. These ions are toxic to man and aquatic life as well, and should be removed from wastewater before disposal. Various treatment technologies have been reported to remediate the potential toxic elements from aqueous media, such as adsorption, ...
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Reclamation of unconventional water using nano zero–valent iron particles: an application for groundwater
Nano zero–valent iron (nZVI) is one of the most prominent examples of a rapidly emerging technology for the treatment of contaminated soil and groundwater. These particles were used successfully to absorb various heavy metals (e.g., Pb2+, Ba2+, As5+, As3+, Cr6+, Co2+, Cd2+, Cu2+), chlorinated organic contaminants (e.g., solvents, pesticides), nitrate and so on. nZVI particles have a large ...
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In-Situ Remediation of Heavy Metals Using Sulfur-Based Treatment Technologies
The Metal Problem Highly toxic and highly soluble metals are contained in numerous waste streams including those from power, chemical, electronics facilities, general manufacturing plants, and mining facilities. Lead, chromium, arsenic, zinc, cadmium, copper, and mercury are the most common metal contaminants found on remediation project sites (US EPA, October, 2000). Cyanide is a common ...
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In-Situ Remediation of Heavy Metals Using Sulfur-Based Treatment Technologies
THE METALS PROBLEM: Highly toxic and highly soluble metals are contained in numerous waste streams including those from power, chemical, electronics facilities, general manufacturing plants, and mining facilities. Lead, chromium, arsenic, zinc, cadmium, copper, and mercury are the most common metal contaminants found on remediation project sites (US EPA, October, 2000). Cyanide is a common ...
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Heavy Metal Fixation Reagent for Soil - What is Heavy Metal Fixation?
Heavy Metal Fixation can be done by a chemical process that will prevent leaching of metals into the ground water during soil remediation projects. Different reagents are available which can stabilize lead, however different reagents required different cure times and addition of moisture, produce different amount of bulking, and produce material with different strengths, densities and other ...
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Lead Stabilization on Industrial Projects - What is Lead Stabilization?
Lead stabilization is the process of encapsulating lead particles created during industrial projects rendering them non-leachable to dispose of as non-hazardous waste. With the occurrence of recent lead stabilization issues, TDJ Group uses a chemically engineered product (Blastox®) to stabilize lead and other heavy metals with a one step process. The modern day is progressing in hazardous ...
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The Role of Graphene in Advancing Nanotechnology
What is Graphene? Graphene is a two-dimensional carbon nanomaterial composed of carbon atoms in a hexagonal honeycomb lattice with special hybrid orbitals. It has excellent optical, electrical, and mechanical properties. Materials with light weight, strongest toughness, best light transmittance, and best electrical and thermal conductivity have important application prospects in materials ...
By Matexcel
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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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Metals Treatment Technologies
What are Metals Treatment Technologies? TDJ’s metals treatment technologies work with lead paint stabilization, soil stabilization and foundry applications. With the modern day progressing in hazardous waste treatment, we are constantly trying to find new ways to innovate and eliminate such problems. With the occurrence of recent lead stabilization issues, TDJ Group uses a chemically ...
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Treatability Study for Contaminated Soil Projects
What is a Treatability Study? When done correctly, a treatability study can be an important component of the remedial investigation/feasibility study (RI/FS) and the remedial design/remedial action (RD/RA) process. Engineers use this tool to help identify the full range of remedial options that are available to their client regarding safe & cost-effective remedies in the market. Remedial ...
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Improving Contaminated Soil Remediation
How to Improve Contaminated Soil Remediation Performance Contaminated soil remediation involves encapsulation and chemical conversion during remediation projects rendering them non-leachable to allow disposal of a non-hazardous waste. The TDJ Group has been providing heavy metal fixation technologies for more than 3 decades to the soil remediation, metal casting, and lead paint abatement ...
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Contaminated Soil Fixation
Contaminated soil is one that has heavy metals present within the project site. The EPA requires a Toxicity Characteristic Leaching Procedure (TCLP) test to determine if metal contaminated soil needs to be managed as hazardous or non-hazardous waste. Soils exhibiting hazardous characteristics need to be disposed of at a facility permitted for that material at a high cost. The alternative is to ...
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Soil Remediation Fixation - Case Study
What is Soil Remediation Fixation? Soil Remediation Fixation can be done by a chemical process that will prevent leaching of metals into the ground water during soil remediation projects. Reactions change the chemical form of the metal from an oxide, carbonate or hydroxide to a silicate, which is significantly less soluble than most other compounds. ...
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