chlorinated compounds Articles
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Hollywood Casino Columbus, Ohio, U.S.A - Case Study
A $400 million redevelopment project that will be the site for a new gaming casino was formerly an automotive factory. The primary contaminants of concern on this 123 acre brownfield site Primary concern were residual chlorinated compounds from former cleaning and manufacturing ...
By CETCO
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Chlorinated Compound - TCE Alabama - Case Study
Accelerated Remediation Technologies, Inc. (ART) in-situ treatment system was selected by a major industrial firm to treat soils and groundwater impacted with chlorinated compounds, mainly TCE, at a site in Anniston, Alabama. The ART technology was installed in nine, six inch wells within the source area. An extensive monitoring program was implemented to evaluate the performance of the ART ...
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Investigation of associations between chemical element contents in native lichens and childhood leukaemia
After a study in which the harmful atmospheric chemical elements (As, Hg, Ni, Pb) were investigated as leukaemia inducers, we have extended this work to 22 chemical elements using data from a lichen survey held in 1993 in Continental Portugal and childhood leukaemia death counts in 275 counties for the period 1991?1998. Kriging models were used to estimate lichen biomonitoring measurements at the ...
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New operating mode for on-line analysis of dioxin emission from stationary sources
Dioxins and furans are produced by an incomplete combustion of organic and chlorinated compounds Generated by stationary sources such as waste incinerators, cement/metal working industry… Dispersal in the environment as aerosols, accumulation in the food chain ...
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Bioremediation Consulting Inc (BCI) develops an anaerobic chloroform-degrading culture
BCI’s newest culture is a microbial mixture (consortia) which can transform chloroform (CF) to dichloroemthane (DCM), a transient intermediate which is then converted to a non-chlorinated product. We have demonstrated that the culture can dechlorinate at least 10 ppm of chloroform. Dechlorinating Bacteria in BCI Cultures. To address single compounds or a mixture of chlorinated ethenes, BCI ...
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Mechanisms of Contaminant Removal under Very Low Redox Induced by EHC
Battelle's Fifth International Conference on Remediation of Chlorinated and Recalcitrant Compounds,Monterey, CA May 21-26, ...
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Fractured Bedrock Formation PCE, Pennsylvania - Case Study
The Accelerated Remediation Technologies, LLC, (ART) Integrated Remediation Technology was installed at an operating, industrial laundry facility to remedy groundwater in a fractured bedrock geologic formation. Contaminant(s) of concern: PCE Site Description: The site is located in eastern Pennsylvania and the subsurface consists of silty clay to depths ranging from 10 to 60 feet underlain by ...
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A Simple Method to Reduce Disinfection By-product Formation
The formation of disinfection byproducts (DBP) during drinking water production has long been of concern toauthorities and consumers alike. Although most disinfectants form unwanted DBPs there is particular concern withchlorine disinfection as a variety of chlorinated compounds are formed with possible adverse health effects, includingtrihalomethanes (THMs). Strategies for controlling THM ...
By Ixom
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Dr. Leo Lehmicke presents paper at Battelle conference
In May, Dr. Leo Lehmicke presented a paper titled “Anaerobic Biodegradation of TCE in Groundwater Following In Situ Thermal Treatment” at the Battelle Conference in Monterey on Remediation of Chlorinated and Recalcitrant Compounds. The presentation describes the successful application of bioaugmentation to treat residual TCE following steam enhanced treatment of a high concentration source ...
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Volatility of heavy metals during incineration of tannery sludge in the presence of chlorides and phosphoric acid
Knowledge of the behaviour of heavy metals in the combustion process is a most important factor in selecting disposal alternatives for waste materials. Accordingly, in this work, the vaporization behaviour of highly concentrated heavy metals (Pb, Zn, Cu and Cr) in tannery sludge were investigated experimentally. The sludge was spiked with various chlorine compounds (i.e. PVC, FeCl3, CaCl2 and ...
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Andover Case Study (C3 Technology)
In this case study in Andover, Vapor Extraction and Refrigerated Condensation was used as a primary source removal technology to remediate high concentrations of recalcitrant chlorinated solvent compounds at the WDE Site in Minnesota. The use of Refrigerated Condensation has achieved high mass removal rates and will reduce the lifecycle costs and time of remediation. Over 6500 drums of hazardous ...
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Effects of the cometabolite/growth substrate ratio on the aerobic degradation of 4-monochlorophenol
Chlorinated phenolic compounds like 4-monochlorophenol (4CP) are characterized by high toxicity even at relatively low concentrations and by strong persistency in both water and soils. Since cometabolism was proved to enhance 4CP biological removal, a conventional Sequencing Batch Reactor (SBR) was used in this study for the cometabolic aerobic degradation of 4CP at different influent ...
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Degradation mechanism of Methyl Orange by electrochemical process on RuOx–PdO/Ti electrode
The electrochemical degradation of Methyl Orange in 0.1 M NaCl solution over RuOx–PdO/Ti anode was investigated. Chemical oxygen demand (COD), ion chromatography (IC), Fourier Transform Infrared Spectroscopy (FTIR) and Gas chromatography-mass spectrometry (GC-MS) were employed to detect the intermediates formed during the electrochemical degradation. In the present reaction system, Methyl Orange ...
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Remediation of dissolved-phase chlorinated hydrocarbons in fractured bedrock
At a former chlorinated hydrocarbon chemical transfer facility in Buffalo, NY, an approximately one-year pilot study was implemented under the New York State Superfund program to evaluate the impact of emulsified vegetable oil, in particular, EOS, on a concentration of chlorinated hydrocarbons in the offsite dissolved phase groundwater plume within a fractured bedrock aquifer and, if successful, ...
By Redox Tech
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Emission of volatile organic compounds from solid waste disposal sites
The emission of volatile organic compounds (VOCs) from a solid waste disposal site for municipal solid wastes was quantified. The VOCs contained in the landfill gas taken at the site were benzene, toluene, xylenes, ethyl benzenes, and trimethyl benzenes, while the concentrations of chlorinated compounds were very low. The concentration of benzene in the landfill gas samples ranged from below the ...
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Immunological and reproductive health assessment in herring gulls and black‐crowned night herons in the Hudson–Raritan Estuary
Previous studies have shown inexplicable declines in breeding waterbirds within western New York/New Jersey Harbor between 1996 and 2002 and elevated polychlorinated dibenzo‐p‐dioxins and polychlorinated biphenyls (PCBs) in double‐crested cormorant (Phalacrocorax auritus) eggs. The present study assessed associations between immune function, prefledgling survival, and selected organ chlorine ...
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Case study - Paint mixing
Overview A company involved in the automotive aftermarket had a paint batch mixing and filling operation that used primers and fillers. They were faced with installing air pollution control equipment to handle the volatile organic compounds (VOCs) emitted by the solvents used in their processes. An independent consultant had determined that total exhaust volume from the facility was 28,000 SCFM ...
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Application of coupled zero-valent iron/biochar system for degradation of chlorobenzene-contaminated groundwater
A novel iron-carbon micro-electrolysis system, bamboo-derived biochar coupled with zero-valent iron (ZVI), was investigated for chlorobenzene (CB)-contaminated groundwater removal. Influences of initial pH value, mass ratio of the ZVI/Biochar, initial CB concentration and ionic strength of the ZVI/Biochar micro-electrolysis were studied. The results indicated that the increase of initial pH ...
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Oxidative degradation of 2,4-dichlorophenoxyacetic acid (2,4-D) in subcritical and supercritical waters
Presence of chlorinated organic compounds in water bodies has become a concern among governments, health authorities and general public. Oxidation of organic compounds in water under high temperature and pressure is considered as a promising technique, but usefulness of the technique to mineralize 2,4-dichlorophenoxyacetic acid (2,4-D) is not well understood. This article aimed to elucidate ...
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Ozone as Sanitizer in Food Processing
Chlorine has traditionally been used in the food industry to control microbial growth on processing equipment and wash water. Fresh-cut produce is often treated with chlorine to extend its shelf life and reduce the risk of foodborne illness. However, chlorination may produce toxic and carcinogenic chlorinated organic compounds in water. ...
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