한국지반공학회:학술대회논문집 (Proceedings of the Korean Geotechical Society Conference)
- 한국지반공학회 2008년도 추계 학술발표회
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- Pages.1463-1474
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- 2008
안정화 처리된 비소오염토양의 장기 용출특성
Long-Term Leaching Characteristics of Arsenic Contaminated Soils Treated by the Stabilization Method
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유찬
(경상대학교 지역환경기반공학과) ;
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윤성욱
(경상대학교 농공학과 대학원) ;
- 백승환 (경상대학교 농공학과 대학원) ;
- 박진철 (경상대학교 농공학과 대학원) ;
- 이정훈 (경상대학교 농공학과 대학원)
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Yu, Chan
(Dept. of Agricultural Engineering, Gyeongsang National University) ;
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Yun, Sung-Wook
(Graduate School, Gyeongsang National University) ;
- Baek, Seung-Hwan (Graduate School, Gyeongsang National University) ;
- Park, Jin-Chul (Graduate School, Gyeongsang National University) ;
- Lee, Jung-Hoon (Graduate School, Gyeongsang National University)
- 발행 : 2008.10.10
초록
In order to investigate stabilization effect and sustainability on As-contaminated farmland soils which were affected the abandoned mine site and stabilized by zerovalent iron(ZVI) and industrial by-products, batch-scale and pilot-scale tests were carried out. In batch tests, ZVI and industrial by-products(blast furnace slag, steel refining slag and oyster shell powder) were used in treatment materials to reduce the As leaching. Industrial by-products were mixed with As-contaminated soils, in the ratio of 1%, 3%, 5% and 7% on the weight base of dried soil. The results of batch-scale tests was shown that the reduction of As concentration was observed in all samples and it was expected that ZVI and steel refining slag were more effective than other treatment materials to stabilize As compounds. In pilot-scale tests, columns were filled with untreated soils and treated soils mixed with ZVI and steel refining slag in the same mixing ratio of 3%. Distilled water was discharged into the columns with the velocity of 0.3 pore volume/day. During the test, pH, EC, Eh and As concentration were measured in the regular term(1pore volume). after six months, pilot-scale tests were retested to investigate sustainability of treatment materials. As a result, It was shown that the leachate from control column was continuously released during the test period and its concentration was greater than
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