Contaminated Sites Articles
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The economic costs of desertification: a first survey of some cases in Africa
This paper presents six studies made on the economic costs of desertification and land degradation in 11 African countries. It presents the main methods used for these macro valuations and their limits. It gives the results obtained and discuss on the concrete implications, for example, in terms of rural investments of such an exercise.Keywords: desertification costs, Africa, environmental ...
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Biofiltration: An Innovative Technology for The Future
Biofiltration refers to the biological transformation or treatment of contaminants present in the gas phase, usually air. The fact that air contaminants can be biodegraded by active bacteria has been known for quite some time. However, it is only in the last 10 years, that biofiltration has begun to emerge as an economically viable treatment process. Initially, biofiltration involved the use of ...
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Geotube Dewatering Technology Provides An Effective Dewatering Technology Solution For Dewatering Aggregate Tailings - Case Study
Simple and inexpensive, Geotube dewatering technology can make management of tailings and fines much easier. Many aggregate plants experience high equipment and manpower costs associated with the handling and removing o( tailings and fines from settling ponds. The costs of maintaining pond operations can vary significantly from plant to plant. Not only is valuable space tied up during gravity ...
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For Light Industry, Geotube Dewatering Technology Provides An Effective Solution - Case Study
For many industrial applications, dewatering is a necessary evil. It disrupts operations, adds cost, and requires complicated and expensive equipment. But this doesn't have to be the case. There's a much simpler, less expensive approach to the task. It's called Geotube dewatering technology, and it's been used in a broad range of industries. Geotube dewatering technology can be a temporary or ...
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Confidential Client - Environmental Remediation Project - Delray Beach, Florida
Levine Fricke Engineers (LFE), an environmental firm under contract to Blackstone Consultants LLC (Blackstone), was responsible for specifying and selecting a cleanup remedy for a former contaminated nursery site located in Delray Beach, Florida. LFE and Blackstone performed site characterization and demonstrated that site groundwater contained very high arsenic concentrations. ...
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Determination of adsorption efficiency based on cation exchange capacity related to red earth, bone meal and pulverised fly ash as ameliorants to lead contaminated soils
Efficient treatment strategies to reduce the toxicity of metal contaminated soil using cost effective techniques such as naturally available ameliorants and industrial waste have emerged. Three easily available amendments were determined: Bone meal, red earth/mud and pulverised fly ash (PFA). The application of ameliorants offered a possible alternative in situ remediation of contaminated sites ...
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Flexibility Makes Geotube Dewatering Technology Ideal For Processing Facilities - Case Study
Processing plants around the world all have something in common—they almost inevitably create waste streams that involve large amounts of water which must be treated before it can be released. The sheer volume of the material often means significant expense. And many systems for dewatering are complicated, expensive, and hard to adapt to different plant situations. TenCate develops and ...
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Brownfields: eyesore or opportunity?
Minute Maid Park, the Downtown Aquarium and the Federal Reserve Bank are all examples of how the City of Houston is cleaning up and reusing local brownfields to create positive impacts on the community through its Brownfields Redevelopment Program. Brownfields are properties where redevelopment is complicated by the presence or perceived presence of environmental contamination. These sites were, ...
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Spatial Patterns and Rankings of Contaminant Concentrations in Herring Gull Eggs from 15 Sites in the Great Lakes and Connecting Channels, 1998–2002
Mean values of eight contaminants in Herring Gull (Larus argentatus) eggs were calculated for 15 Great Lakes sites for the 5 year period 1998–2002. The sites were ranked according to the concentrations of each of seven compounds relative to fish flesh criteria for the protection of piscivorous wildlife, and a single overall rank of contamination was calculated for each site. Based on this ...
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Definition and Number of Subsamples for Using Mosses as Biomonitors of Airborne Trace Elements
Abstract We collected 50 subsamples of the moss Scleropodium purum from each of three sampling sites and determined the concentrations of As, Cd, Cu, K, Hg, Ni, Pb, Se, and Zn in each subsample. We then calculated the number of subsamples required to determine significant differences in the mean concentrations of two sampling sites. We found that to differentiate between an uncontaminated ...
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Induction of CYP1A mRNA in Carp (Cyprinus carpio) from the Kalamazoo River Polychlorinated Biphenyl-Contaminated Superfund Site and in a Laboratory Study
Abstract The Kalamazoo River Superfund site in Michigan is contaminated with polychlorinated biphenyls (PCBs), which were heavily discharged into the river from several paper companies as part of the deinking process in the 1950s through 1970s. We characterized biomarkers of chronic PCB exposure in a resident fish population using real-time reverse transcriptase–polymerase chain reaction to ...
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Geostatistical modelling of ground conditions to support the assessment of site contamination
The pattern of ground contamination across a site depends on the historical pattern of contaminant releases at the surface and the redistribution and the fate of contaminants below the surface. Using these concepts a new site assessment approach (assessment modelling) is proposed based on the development of three stochastic models: a model of the physical structure of the ground materials beneath ...
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Sediments as a Reservoir of Indicator Bacteria in a Coastal Embayment: Mission Bay, California,
Abstract Mission Bay is a large, heavily-used coastal embayment within the City of San Diego that includes over 27 miles of recreational shoreline. Historically, exceedances of state water quality standards for indicator bacteria (total coliform, fecal coliform, and enterococcus) have been a persistent problem at some beaches in Mission Bay. A 2-year comprehensive study was conducted to ...
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Bioremediation of petroleum hydrocarbons through landfarming: Are simplicity and cost-effectiveness the only advantages?
The biological removal of petroleum products using landfarming has been applied commercially in large scale with relative success. The technology has been widely used due to its simplicity and cost-effectiveness. However, together with these advantages, there are physical, chemical and biological aspects of the technology that can hamper the remediation process. The dominant pollutant removal ...
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Application of Multicriteria Decision Analysis in Environmental Decision Making
Decision making in environmental projects can be complex and seemingly intractable, principally because of the inherent trade-offs between sociopolitical, environmental, ecological, and economic factors. The selection of appropriate remedial and abatement strategies for contaminated sites, land use planning, and regulatory processes often involves multiple additional criteria such as the ...
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Contaminated land: bank credit risk for small and medium size UK enterprises
With the implementation of the environmental legislation in April 2000 in the UK, the paper examines how provisions relating to contaminated land might affect loan decision-making by financial lending institutions to small and medium size enterprises (SMEs). The potential for a borrower or lender to incur liability for the cleaning up of contaminated land is now real. An insight into how banks ...
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Prediction of Soil and Nutrient Losses in A Highland Catchment
Highland catchments in tropical regions are frequently subjected to soil erosion and the transport of chemicals downstream. Any drastic changes in land use will increase the severity of these processes of land degradation. A simulation study using GLEAMS (Groundwater Loading Effects of Agricultural Management Systems) was conducted at a catchment presently under tea farming in Cameron Highlands, ...
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The impact of an open waste disposal site on soil and groundwater pollution
A study has been carried out of a waste disposal site, located in the valley of a small creek, 3 km south of Canakkale city centre. The surface area of the site was around 101000 square metres, and the total amount of waste deposited at the site since 1990 was approximately 1001000 tons. The major risks of the dump are its closeness to the university campus area to the south, the airport to the ...
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U.S. EPA Updates Vapor Intrusion Guidance
Untitled Document The attention of EPA and state environmental agencies to assessing the vapor intrusion pathway at potentially contaminated sites is growing. On March 5, 2005, EPA discussed its pending update of its draft Vapor Intrusion Guidance (Nov 2002) at the Association for Environmental Health and Sciences (AEHS) meeting held in San Diego. Also, a vapor intrusion ...
By AECOM
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A GIS-based approach for the long-term prediction of human health risks at contaminated sites
A Health Index/Risk Evaluation Tool (HIRET) has been developed for the integration of risk assessment and spatial planning using GIS capabilities. The method is meant to assist decision makers and site owners in the evaluation of potential human health risk with respect to land use. Human health risk defined as the potential adverse effects on human life or health is generally accepted as the ...
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