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Removal of PAHs and PCBs in artificially contaminated soils using electron beam irradiation  

김석구 (한국건설기술연구원 수자원환경연구부)
정장식 (한국건설기술연구원 수자원환경연구부)
김이태 (한국건설기술연구원 수자원환경연구부)
배우근 (한양대학교 건설환경시스템공학과)
Publication Information
Journal of Soil and Groundwater Environment / v.7, no.3, 2002 , pp. 61-70 More about this Journal
Abstract
Direct electron beam irradiation experiments on artificially contaminated soil by polynuclear aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) were performed to evaluate applicability of direct electron beam irradiation process for contaminated soil remediation. The removal efficiency of PAHs was about 97 % at 600 kGy and PCBs about 70 % at 800 kGy. PAHs were removed 27 % more, compared to PCBs although the absorbed dose was as low as 200 kGy. The contaminants decomposition was due predominantly to direct interaction of high-energy electrons and the target compounds rather than due to oxidation/reduction reaction by reactive intermediates. Radiolysis of electron beam may be able to decontaminate contaminated soil by toxic and recalcitrant organic compounds like as PAHs and PCBs effectively, but it may be economically uncompetitive. Thus, developments of post-treatment process of conventional site remediation technologies may be more practical and economical than direct radiolysis.
Keywords
PAHs; PCBs; Electron beam; contaminated soil; remediation; PAHs; PCBs;
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