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제114회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Reductive dechlorination of tetrachloroethylene by mackinawite in cement slurries with cobalamin

등록일
2014년 8월 28일 16시 08분 02초
접수번호
1195
발표코드
ENVR.P-1279 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 15일 (수요일) 16:00~19:00
발표형식
포스터
발표분야
환경에너지
저자 및
공동저자
김상우, 이우진*
한국과학기술원(KAIST) 건설 및 환경공학과, Korea
Degradative solidification/stabilization (DS/S) is a modification of conventional solidification/stabilization (S/S) to degrade organic contaminants and immobilize inorganic contaminants simultaneously. This study investigates reductive dechlorination of tetrachloroethylene (PCE) in iron-based DS/S process by using mackinawite (FeS) and cobalamin (Cbl(III)) as an reductant and electron transfer mediator (ETM), respectively. FeS and Cbl(III) are naturally formed by microbial activity in the sulfate-reducing environment easily found at groundwater system. Cement has been found to enhance the reductive dechlorination kinetics of PCE by catalyze or participate in reactions. Cbl(III) has played a critical role as an electron transfer mediator (ETM) for reductive dechlorination of PCE in the DS/S-FeS system. The reductive dechlorination kinetics of PCE was significantly enhanced as concentration of Cbl(III) increased. The DS/S-FeS-Cbl(III) system was significantly dependent on pH. As pH increased, the dechlorination kinetics of PCE increased. To investigate the factors which catalyze or participate in PCE degradation reactions, X-ray diffraction, X-ray photoelectron spectroscopy spectra and Transmission electron microscopy image were obtained. Present studies can provide basic knowledge for enhanced reductive dechlorination of PCE by FeS in cement slurry with Cbl(III) in the sulfate-reducing environment.

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