PCB soil Articles
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Effect of plant age on PCB accumulation by Cucurbita pepo ssp. pepo
Received for publication May 7, 2009. A greenhouse experiment was conducted to investigate polychlorinated biphenyl (PCB) uptake and translocation from soil over time in pumpkin plants (Cucurbita pepo ssp. pepo cv. Howden). Plants were grown in weathered soil collected from a former industrial site contaminated with Aroclor 1248 (mean [PCB]soil = 6.5 mg kg–1). Plants were harvested five times ...
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Analysis of Polychlorinated Biphenyls in Soil
Polychlorinated biphenyls (PCBs), also known as chlorinated biphenyls, are a class of chlorides formed by the substitution of chlorine for hydrogen atoms in the biphenyl ring. PCB is a synthetic organic compound used in industry as heat carrier, insulating oil and lubricating oil. The wide use of PCBs in industry has caused global environmental pollution problems. Waste from factories that use ...
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Establishing PCB Cleanup Levels for Historical Spills in Texas
INTRODUCTIONPolychlorinated biphenyls (PCBs) are a mixture of chlorine atoms and biphenyl molecules that combine to form complex chlorinated organic compounds that were manufactured and widely used in the United States from the 1940s through 1978. The chemical characteristics of PCBs made them desirable for use because of their electrical properties and low flammability. Unfortunately, the PCBs ...
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Case Study: Santa Monica College
Property Description: Former Military Research Complex. Five circa-1970 buildings. Total area = app. 380,000 s.f. Environmental Issues Identified: Asbestos in fireproofing, wallboard and flooring throughout. Lead in damaged paint. Possible soils contaminants. Services Provided: Ellis performed pre-demolition asbestos and lead surveys, as well as a Phase I (historical records search) site ...
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In-situ remediation of Polycyclic aromatic hydrocarbon contaminated soils - New Jersey, USA case study
Executive Summary A New Jersey utility company operated a regulator station on the site of a former manufactured gas plant in central New Jersey. The gas transfer station contained a large natural gas feeder main that fed major population centers in the southern part of the state. The regulator station contained an area approximately 3,600 ft2 contaminated to a depth of 1 meter with both PCBs and ...
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Contaminant‐mobilizing capability of fullerene nanoparticles (nC60): Effect of solvent‐exchange process in nC60 formation
Fullerene nanoparticles (nC60) in aqueous environments can significantly enhance the transport of hydrophobic organic contaminants by serving as a contaminant carrier. Here, the authors examine the effect of the solvent‐exchange process on nC60 aggregate formation, and subsequently, on nC60's contaminant‐mobilizing capability. A series of nC60 samples were prepared using a modified ...
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Dehalogenation
Introduction: Contaminated soil is screened, processed with a crusher and pug mill, and mixed with reagents. The mixture is heated in a reactor. The dehalogenation process is achieved by either the replacement of the halogen molecules or the decomposition and partial volatilization of the contaminants. Base-catalyzed Decomposition (BCD) Base-catalyzed decomposition (BCD) process was developed ...
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GC-MS/MS analysis of PAH and PCB in environmental samples
The polychlorinated biphenyls (PCB) and polyaromatic hydrocarbons (PAH) are among the most commonly analysed compound classes in environmental analysis. This article demonstrates how hydrogen carrier gas can be used in place of helium for GC-MS/MS analysis of these compounds. Analysis of polyaromatic hydrocarbons (PAH) is typically conducted using HPLC with UV- and fluorescence detection. ...
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Bulk reactive media utilized in sediment cap remedy for large-scale remediation project case study
Project: West Branch Grand Calumet River Reach 1-2, Roxana Marsh Legacy Location: East Chicago. IN Products: Organoclay2 PM-199 Background: in 2011. clean up began on Reach 1 and Roxana Marsh in the West Branch of the Grand Calumet River. This project involved mechanical and hydraulic dredging and removal of 222,000 cubic yards of sediments and soils impacted with PAH, PCB, and various heavy ...
By CETCO
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Slurry Phase Biological Treatment
Slurry phase biological treatment involves the controlled treatment of excavated soil in a bioreactor. The excavated soil is first processed to physically separate stones and rubble. The soil is then mixed with water to a predetermined concentration dependent upon the concentration of the contaminants, the rate of biodegradation, and the physical nature of the soils. Some processes pre-wash the ...
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Selected studies done by LIFETECH (2003-2010) Case Study
Decomposition of hardly biodegradable polyethers and polyesters in wastewater from rubber tubing production 2010 Reduction of COD in wastewater from mechanical pulp production 2010 Ozonation of condensates aiming at the reduction of their TOC content 2009 Reduction of AOX content in wastewater from wool washing processes 2008 COD reduction in wastewater containing polyvinyl alcohol by an ...
By Lifetech
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A Citizen`s Guide to Chemical Dehalogenation
What is chemical dehalogenation? Chemical dehalogenation is a chemical process to remove halogens (usually chlorine) from a chemical contaminant, rendering it less hazardous. Halogens are a class of chemical elements that include chlorine, bromine, iodine, and fluorine. Polychlorinated biphenyls are halogenated compounds that once were used in high voltage electrical transformers because they ...
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Activated carbon mat instrumental as part of overall remediation strategy case study
Project: Grand Calumet River - West Branch, Reach #3 Location: Hammond, IN Products: Reactive Core Mat Background: In 2009. clean up began on a one-mile stretch of the West Branch of the Grand Calumet River. This project involved the mechanical dredging and removal of 82,000 cubic yards of sediments and soils impacted with PAH. PCB, and various heavy metals. The estimated $33 million project was ...
By CETCO
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Surfactant desorption is key to successful PAH bioremediation
Formulations which are patented non-ionic surfactant mixtures used in the in situ and ex situ treatment of petroleum hydrocarbons, chlorinated solvents, heavy metals, and more recently PAHs, PCBs and MTBE type contaminated waste are involved in Surfactant Enhanced Bioremediation (SEB®) using Iveysol ®. These surfactant formulations have the ability to enhance soil biodegradation. During in ...
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Risk Assessment/Toxicology Promotes Health and Welfare of Humans and Ecosystems
Hundreds of regulations protecting the health and welfare of humans and ecosystems impact industrial and legal firms every day. Commonly, these regulations are associated with protecting human health and the environment from risks associated with site cleanup and closure or remediation projects. Other major health risk regulations are derived from Natural Resources Damage Assessment (NRDA), ...
By AECOM
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Thermal Desorption
Untitled Document Introduction: Thermal desorption is a physical separation process and is not designed to destroy organics. Wastes are heated to volatilize water and organic contaminants. A carrier gas or vacuum system transports volatilized water and organics to the gas treatment system. The bed temperatures and residence times designed into these systems will volatilize ...
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The Nitty-Gritty of Dust Control
Landfill owners and operators spend a lot of time focusing on containment: containment of waste; containment of leachate; containment of gas, litter, and odors. Quite often, containment of dust ranks near the bottom of the list. But that doesn’t lessen the importance of dust control. Originally published in MSW Management. By Neal Bolton If not properly controlled, fugitive dust can ...
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Pollutants in Urban Wastewater and Sewage Sludge
Untitled Document Executive Summary Water policy in the European Union is aiming to promote sustainable water use and a major objective of the new Water Framework Directive (2000/60/EC) is the long-term progressive reduction of contaminant discharges to the aquatic environment in urban wastewater (UWW). Sewage sludge is also a product of wastewater treatment and the Urban Waste ...
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