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Reactive activated carbon (RAC) impregnated with palladized iron has been developed to effectively treat polychlorinated biphenyls (PCBs) in the environment by coupling adsorption and dechlorination of PCBs. In this study, we addressed the dechlorination reactivity and capacity ...

Observations from field sites provide a means for prioritizing research activities. In the case of petroleum releases, observations may include spiking of concentration distributions that may be related to water table fluctuation, co-location of contaminant plumes with geochemi...

Sustainable Management Approaches and Revitalization Tools - electronic (SMARTe), is an open-source, web-based, decision support system for developing and evaluating future reuse scenarios for potentially contaminated land. SMARTe contains information and analysis tools for all a...

SMARTe (Sustainable Management Approaches and Revitalization Tools-electronic) is an open-source, web-based, decision-support system for developing and evaluating future use scenarios for potentially contaminated sites (i.e., brownfields). It contains resources and analysis tools...

Excessive heat, prolonged droughts, extreme floods, and more intense wildfires will not only affect communities directly, but also indirectly through impacts to infrastructure and the surrounding landscape. Indirect consequences could include higher exposures to water- and air-bo...

At contaminated sediment sites, the Superfund program usually must decide whether to leave the site alone, cap it, or dredge it. This decision is based in part upon the relative risk to the environment and human health posed by each alternative. Whatever decision is made at a s...

A newly proposed geoelectrical model for hydrocarbon contaminated sites predicts high <br>conductivities coincident with t he Contaminated zone a s opposed t o t he traditionally accepted low conductivity. The model attributes the high conductivities to mineral weathering resulti...

Technical recommendations have recently been published by the U.S. Environmental Protection Agency to address site characterization needed to support selection of Monitored Natural Attenuation (MNA) for cleanup of inorganic contaminant plumes in groundwater. Immobilization onto ...

Former sugarcane lands on the Island of Hawaii have elevated soil arsenic (As) from historical use of arsenical pesticides. The bioaccessible fraction of total As (As<SUB>TOT</SUB>), a measure of the potential for human As uptake by incidental ingestion of soil, is used in the a...

At contaminated sediment sites, the Superfund program usually must decide whether to leave the site alone, cap it, or dredge it. This decision is based in part upon the relative risk to the environment and human health posed by each alternative. These risks, in turn, depend upo...

Mercury is a particularly toxic heavy metal which because of it's volatility easily impacts the globe and is partially responsible for loss of the ozone layer and thus global warming. The soil isolate Pseudomonas aeruginosa CHL004 has been found to concentrate Pb2+ and perhaps ot...

NRMRL-ADA-02202 Bidgood, J., Hicks, John R., and Kampbell*, D.H. Methods and Analyses for Implementing Natural Attenuation Protocols. Petroleum Hydrocarbons & Organic Chemicals in Ground Water Conf., ...

Remedial technologies utilized at hazardous waste sites for the treatment of metal and metalloid contaminants often take advantage of reduction-oxidation (redox) processes to reach ground water clean up goals. This is because redox reactions, in many cases, govern the biogeochem...

The U.S. Environmental Protection Agency is charged by Congress with protecting the Nation's land, air, and water resources. Under a mandate of national environmental laws, the Agency strives to formulate and implement actions leading to a compatible balance between human acti...

NRMRL-ADA-00329 Azadpour-Keeley**, A., Keeley, J.W., Russell, H.H., and Sewell*, G.W. Monitored Natural Attenuation of Contaminants in the Subsurface: Applications. Ground Water Monitoring and Reme...

There is extensive mercury contamination of soil surrounding a chloralkali plant in Pavlodar, Kazakhstan that operated from 1970 to 1990. High-level mercury contamination exists within the confines of the plant, at nearby off-site waste storage and evaporation ponds, and in Balky...

EPA's mission is to protect human health and to safeguard the natural environment B air, water, and land B upon which life depends. Sediments are an integral component of aquatic ecosystems providing a habitat for many aquatic organisms. Chemicals released to surface waters fro...

EPA's mission is to protect human health and to safeguard the natural environment B air, water, and land B upon which life depends. Sediments are an integral component of aquatic ecosystems providing a habitat for many aquatic organisms. Chemicals released to surface waters fro...

Dogs have been used extensively in law enforcement and military applications to detect narcotics and explosives for over thirty years. Dogs are regularly used in arson investigations to detect accelerants since they are much more accurate at discriminating between accelerants an...

Phytoremediation has potential to be implemented at mercury (Hg) and methylmercury (MeHg) contaminated sites. Water hyacinths (<I>Eichhornia crassipes</I>) were investigated for their ability to assimilate Hg and MeHg into plant biomass, in both aquatic and sediment-associated f...

This paper describes the remedial approach, organizational structure and key elements facilitating effective and efficient remediation of contaminated sites at March Air Force Base (AFB), California. The U.S. implementation and quality assurance approach to site remediation for a...

The Research Triangle Institute (RTI) began work in 1983 to investigate contaminated sites in the United States where cleanup measures have been carried out to enable specific redevelopment of a site. This work resulted in a report issued by the U.S. Environmental Protection Ag...

The product is a report of a study conducted to fill data gaps with respect to metals concentrations in soil from residential, industrial and park properties. An XRF instrument was used to analyze samples from 83 properties in order to compare to screening levels. Results were ...

Mining nd smelting of Pb, Zn and Cd ores have caused widespread soil contamination in many countries. In locations with severe soil contamination, and strongly acidic soil or mine waste, ecosystems are devastated. Research has shown that An phytotoxicity, Pb-induced phosphate def...

There is growing international recognition that revitalization of regions containing potentially contaminated sites to meet economic, environmental/ecological, and social/cultural demands can and should contribute to the sustainability of the human and natural environment by impr...