SUPERCRITICAL EXTRACTION OF PCB CONTAMINATED SOILS.

Document Type

Conference Proceeding

Publication Date

12-1-1985

Abstract

Supercritical fluid (SCF) extraction of organic hazardous waste from contaminated soils is a promising new technique for hazardous waste site cleanup. The ability of SCFs to solubilize heavy molecular weight organics is well documented. In this investigation supercritical carbon dioxide (SC-CO//2) was used to extract PCBs, DDT, and toxaphene from contaminated topsoils and subsoils. An attractive feature of this process is that the CO//2, being virtually inert, will leave no solvent residue on the processed soil. Furthermore, the ease of separation of the extracted solute from SC-CO//2 results in the creation of a smaller waste volume of the now concentrated organic, improving the efficiency of subsequent treatment processes such as combustion.

Publication Source (Journal or Book title)

United States Environmental Protection Agency, Office of Research and Development, (Report) EPA

First Page

479

Last Page

480

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