--> --> ABSTRACT: Soil Washing Processes and How They Work (Or Don't Work), by David W. Bieber, John Y. Mason, Robert H. Wohleb; #91020 (1995).
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Previous HitSoilNext Hit Washing Processes and How They Work (Or Don't Work)

David W. Bieber, John Y. Mason, Robert H. Wohleb

Previous HitSoilNext Hit washing is a young technology for the remediation of contaminated soils. Typical washing schemes have relied on three basic processes to accomplish their remediation goals. These three processes are contaminant concentration, contaminant destruction through chemical oxidation, and surfactant activated bio-enhanced contaminant destruction.

Previous HitSoilNext Hit washing processes that focus on concentration, isolate the Previous HitsoilNext Hit fraction containing the majority of the contaminants (i.e. clays). They are most practical for the remediation of non-organic-contaminants. Previous HitSoilNext Hit Washing using chemical oxidation relies on the destruction of contamination by strong oxidizing agents such as hydrogen peroxide. Surfactant activated bio-enhanced destruction operates on the principle of solubilizing contamination to increase its surface area, which dramatically increases bioremediation rates. The chemical oxidation process has traditionally been used to remediate organic contaminants Chemical oxidation is loosing favor as surfactant activated bio-enhanced destruction becomes more common.

Like all emerging technologies, Previous HitsoilNext Hit washing has had its share of growing-pains. Initial Previous HitsoilNext Hit washing efforts suffered from high costs and inefficient equipment. As the actual chemical, biological, and mechanical processes involved in Previous HitsoilNext Hit washing were understood, the initial problems were overcome. Current generation, transportable Previous HitsoilNext Hit washing systems are capable of washing over 500 metric tons of Previous HitsoilNext Hit per day. The primary limiting factor on the quantity of Previous HitsoilNext Hit that can be processed in a day is the percent of material less than 100 microns present in the Previous HitsoilNext Hit. When properly applied, Previous HitsoilNext Hit washing is a quick and cost effective method for remediating contaminated Previous HitsoilTop.

AAPG Search and Discovery Article #91020©1995 AAPG Annual Convention, Houston, Texas, May 5-8, 1995