Supercritical fluid extraction/gamma-radiolysis of PCBs from contaminated soil.
Off-line supercritical fluid extraction (SFE) followed by gamma-radiolysis as an alternative treatment technique for PCB-contaminated soil was investigated in this study using BZ #54 (2, 2',6,6'-tetrachlorobiphenyl) as the model compound. The preliminary results indicate that removal of BZ #54 from spiked sand and soil using SFE at 150 degrees C and 20 MPa is 98% and 93%, respectively. The reduction efficiency of 864 mg/l BZ #54 in isooctane by gamma-radiolysis is 99.8% at an absorbed dose of 500 kGy.
Yak
H K
HK
Department of Chemistry, University of Idaho, Moscow, ID 83844, USA.
Mincher
B J
BJ
Chiu
K
K
Wai
C M
CM
D004785:Environmental Pollutants / Q000493:pharmacokinetics*; D006358:Hot Temperature; D011078:Polychlorinated Biphenyls / Q000493:pharmacokinetics*; D012989:Soil Pollutants / Q000493:pharmacokinetics; D018505:Waste Management / Q000379:methods*
D004785:Environmental Pollutants; D012989:Soil Pollutants; D011078:Polychlorinated Biphenyls