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Technical feasibility and conceptual design for using supercritical fluid to extract pesticides from aged soil
Author(s) -
Farley James A.,
Hunter G. Bradley,
Crim Michael C.
Publication year - 1994
Publication title -
remediation journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.762
H-Index - 27
eISSN - 1520-6831
pISSN - 1051-5658
DOI - 10.1002/rem.3440040304
Subject(s) - supercritical fluid , supercritical fluid extraction , incineration , extraction (chemistry) , environmental science , supercritical carbon dioxide , waste management , contamination , process engineering , environmental chemistry , chemistry , engineering , chromatography , organic chemistry , ecology , biology
The demand for processes to clean up contaminated soils without introducing additional contaminants is increasing. One approach to solving this problem is the use of supercritical fluids like carbon dioxide, alone or with cosolvents, to extract contaminants from the soil. Carbon dioxide is readily available, inexpensive, and nonpolluting. Gases exhibit unique properties under supercritical conditions. They retain the ability to diffuse through the interstitial spaces of solid materials, plus they have the solvating power of liquids. Soil cleanup using supercritical fluid extraction (SFE) is being investigated as an alternative/complementary technology to other cleanup methods such as incineration and bioremediation. The objective of the studies included in this article was to collect and analyze data to support use of the SFE technology and to provide the conceptual design and operational processes needed for building a portable treatment unit.