surface contamination Articles
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Quantitative Assessment of Regional Rock Aquifers, South-Western Quebec, Canada
The population of the St. Lawrence Lowlands platform in south-western Quebec, Canada, is heavily dependent on groundwater. The present study summarizes the quantity, quality and sustainability estimations of the groundwater resources found mainly in sedimentary rock aquifers. Results show that the regional groundwater flow in the considered domain of 1,500 km2 is 97.7 Mm3/y with: 86.6% ...
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Bay project, Escanaba, MI
PROJECT: Bay Project - Union Pacific RailroadLOCATION: Escanaba, MIPRODUCTS: Bulk Organoclay®, Reactive Core Mat® SEDIMENT REMEDIATION CHALLENGES: Near Escanaba, MI, engineers found a bay that was showing evidence of soluble organics (NAPL) on its surface which was threatening the nearby fresh water bay. A reoccurring sheen was developing on the surface in which local contaminated groundwater ...
By CETCO
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Adsorption of As, B, Cr, Mo and Se from coal fly ash leachate by Fe3+ modified bentonite clay
Fly ash contains the potentially toxic elements As, B, Cr, Mo and Se which upon contact with water may be leached to contaminate surface and subsurface water bodies. This study aims to evaluate the adsorption of these elements from coal fly ash leachates on Fe3+-modified bentonite (Fe-Bent); such modification improved the physicochemical properties of bentonite clay. For optimization of ...
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Case Study - Ice blast technology for nuclear decontamination
Application: Customer has 150 gondola type rails cars used to transport contaminated soil/debris to it’s facility in the Tooele Hazardous Industry District. Customer requested CIB demonstrate/test the ice blast process effectiveness in removing contaminated soil/dirt/debris from interior steel surfaces of transport rails car. Customer requires the cleaning process to remove surface ...
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Sustainable management of household solid waste
In most countries, the majority of household solid waste is landfilled because of associated low capital, operation and maintenance costs. However, many existing landfills have exhausted their handling capacities and new facilities are faced with the problem of siting. Alternatives to traditional landfill practice are required to achieve sustainability in managing solid waste. This manuscript ...
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Monitoring leachate composition at a municipal landfill site in New Delhi, India
Most of the landfills in developing countries do not have any liner at the base, or a drainage layer or a proper top cover, which results in the potential problem of groundwater/surface water contamination due to the leachate. Hence, to decide whether the leachate is to be collected and treated, or may be allowed to discharge into the adjoining soil or public sewer or surface waterbody, it is ...
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Making MGP Wastes Beneficial
More than 11 billion gallons of coal tar were generated at MGP sites in the United States from 1816 to 1947. The types and quantities of waste discharged to surface waters from MGPs vary from site to site, and the disposition of several billion gallons is unknown and remains unaccounted for. Numerous locations in the United States have sediments and soils contaminated with wastes generated from ...
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Zero Valent Iron - Normalizing and Valueing Surface Area Claims
Synthesis: The synthetic method used to produce the ZVI particles is crucial for cost, reactivity, and the ability of the particle to transport through the subsurface. The chemical and physical synthesis of ZVI particles will impart differing reactivity, particle shape, and impurities in the ZVI particles which can have both positive and negative effects on remediation properties. Nano-Iron ...
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Do I need a Phase I Environmental Site Assessment (Phase I ESA) and What do they cost?
A Phase I Environmental Site Assessment, often called a Phase I ESA, is generally performed on a commercial property usually as part of a sale/purchase or commercial financing by a broker or other lending institution. The objective is to protect a prospective buyer, property owner, or lending institution from some unforeseen aspect of the property that could affect the value or saleability of ...
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Who needs a Phase I Environmental Site Assessment (Phase I ESA) and What do they cost?
Phase I Environmental Site Assessment A Phase I Environmental Site Assessment, often called a Phase I ESA, is generally performed on a commercial property usually as part of a sale/purchase or commercial financing by a broker or other lending institution. It is intended to protect a prospective buyer, property owner, or lending institution from some unforeseen aspect of the property that could ...
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Modelling the hydrologic effects of land-use and climate changes
Climate and land use affect water quantity and quality; however, the complex relations of climate and land use regarding flow and instream nutrient levels have yet to be elucidated. This study aims to assess the hydrologic effects of different land-use and climatic regimes in the Lower Great Miami River Basin. The modelling results from BASINS showed that, as expected, agricultural lands and the ...
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Variations of disinfection by-product levels in small drinking water utilities according to climate change scenarios: a first assessment
In Québec, Canada, shifts in climate patterns (i.e., rainfall increase) could have consequences on source water quality due to the intensification of surface/groundwater runoff contamination events, leading to a decline in drinking water treatment efficiency and ultimately disinfection by-products (DBPs) formation following treatment. To assess the impacts of climate change (CC) scenarios on ...
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NORMs contamination treatment using Ivey-sol technology
NORMs (naturally occurring radioactive materials) are found almost everywhere, and many natural materials, such as the earth’s crust, contain such radioactive materials. So what happens when oil and gas activities such as petroleum refining and natural gas extraction, disturb such radioactive material? They can alter the natural background radiation — the radiation that we are ...
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A performance assessment of arsenic-iron removal plants in the Manikganj District of Bangladesh
In Bangladesh, arsenic contamination of groundwater, microbial contamination of surface water and seasonally variable rainfall make reliable access to acceptable quality drinking water a challenge. Arsenic-iron removal plants (AIRPs) are a relatively inexpensive way of removing arsenic from groundwater for access to safer drinking water. This study evaluated the performance of 21 (of 105) AIRPs ...
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Treatment of Perchlorate and 1,1,1-Trichloroethane in Groundwater using Edible Oil Substrate (EOS®)
ABSTRACT: Laboratory studies and a pilot-scale field test are being conducted to evaluate the use of edible oil emulsions for biodegradation of perchlorate and 1,1,1-trichloroethane (1,1,1-TCA) in groundwater at a site in Maryland. The patented Edible Oil Substrate (EOS®) process is a cost-effective approach for stimulating in situ anaerobic biodegradation with little or no operation and ...
By Redox Tech
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CAT 100 & BOS 100 Remediation at Northern European Active Industrial Site - Case Study
The subject site is a former dry cleaning facility in Northern Europe, where a large tetrachloroethylene (PCE) plume was impacting groundwater on and off-site. In 2017, CAT 100 and BOS 100® were applied as part of a large-scale remediation program. Currently, a 95% average reduction in PCE plume concentrations has been observed in the monitoring wells located in the areas targeted by the ...
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Brownfield Site Phytoremediation for Oil Company - Case Study
The site was a petroleum tank farm from the early half of the 20th century. Contaminants on-site include petroleum hydrocarbons, benzene and ethylbenzene, and PAHs naphthalene and 2-methylnapthalene. Most contaminants are in subsurface and groundwater, with the exception of PAHs that extend from the surface to ...
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Pump-and-Treat Ground-Water Remediation - A Guide for Decision Makers and Practitioners
Pump-and-treat is one of the most widely used ground-water remediation technologies. Conventional pump-and-treat methods involve pumping contaminated water to the surface for treatment. This guide, however, uses the term pump and treat in a broad sense to include any system where withdrawal from or injection into ground water is part of a remediation strategy. Variations and enhancements of ...
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Depth of the biologically active zone in upland habitats at the Hanford Site, Washington: Implications for remediation and ecological risk management
Soil invertebrates, mammals, and plants penetrate and exploit the surface soil layer (i.e., the biologically active zone) to varying depths. As the U.S. Department of Energy remediates radioactive and hazardous wastes in soil at the Hanford Site, a site‐specific definition of the biologically active zone is needed to identify the depth to which remedial actions should be taken to protect the ...
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Pollution and its impact on Noyyal river basin, India: an integrated approach of remote sensing and biotechnology using GIS
Numerous surface and ground water resources have been polluted by industries located around the river Noyyal, India. The water quality has been estimated to define the impact of contaminants in the study area. Fish sample (O.mosaambicus) has been collected from different locations. An elevated level of RBC, WBC count and changes in total percentage has been observed. Glutathione peroxidise ...
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