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Supercritical fluid extraction/gamma-radiolysis of PCBs from contaminated soil
1Department of Chemistry, University of Idaho, Moscow, ID 83844, USA.
Abstract:
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.
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