- Transition of Lead from Agricultural Paddy Soil Amended with Lime to Rice Plant after Bench-scale In-situ Washing with FeCl3
- Koh, Il-Ha;Kim, Jungeun;Kim, Gi Suk;Chang, Yoon-Young;Yang, Jae-Kyu;Moon, Deok Hyun;Choi, Yulim;Ji, Won Hyun;
- National Environment Lab. (NeLab);National Environment Lab. (NeLab);National Environment Lab. (NeLab);Department of Environmental Engineering, Kwangwoon University;Ingenium College of Liberal Arts, Kwangwoon University;Department of Environmental Engineering, Chosun University;Department of Environmental Engineering, Kwangwoon University;Mine Reclamation Corporation (MIRECO);
- 납 오염 논토양의 원위치 세척을 위한 FeCl3의 Bench-scale 적용성 평가: 소석회를 이용한 토양산도 개선 및 납의 벼 전이특성
- 고일하;김정은;김지숙;장윤영;양재규;문덕현;최유림;지원현;
- 환경기술정책연구원;환경기술정책연구원;환경기술정책연구원;광운대학교 환경공학과;광운대학교 인제니엄학부;조선대학교 환경공학과;광운대학교 환경공학과;한국광해관리공단;
Abstract
Pot experiments were conducted to assess the applicability of ferric chloride ($FeCl_3$ ) as a washing agent for laboratory scale in-situ soil washing of paddy soil contaminated with Pb. During the monitoring period for nearly 90 days, the concentrations of Fe and Mn in the soil solution were lower than that of control soil due to lime ($Ca(OH)_2$ ) amendment for pH recovery. Lime amendment also affected solubility and fractionation of Pb into soil matrix. The result showed that Pb concentrations of soil solution were consistently lower than that of control soil, and the concentration in the exchangeable fraction in washed soil decreased from 13 to 2 mg/kg. There was no significant difference of biomass yield of rice plant in each pots, and Pb contents in rice roots and grains in washed soil decreased to 50 and 78%, respectively, of the control soil. Therefore, $FeCl_3$ could be used as an acceptable in-situ washing agent for agricultural paddy soil if appropriate soil pH management is subsequently practiced.
Keywords: $FeCl_3$;Pb;In-situ;Soil washing;Paddy;
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