• Assessment on the Transition of Arsenic and Heavy Metal from Soil to Plant according to Stabilization Process using Limestone and Steelmaking Slag
  • Koh, Il-Ha;Lee, Sang-Hwan;Lee, Won-Seok;Chang, Yoon-Young;
  • Department of Environmental Engineering, Kwangwoon University;Korea Mine Reclamation Corporation (MIRECO);National Institute of Environmental Research (NIER);Department of Environmental Engineering, Kwangwoon University;
  • 석회석과 제강슬래그를 이용한 오염토양 안정화에 따른 비소 및 중금속의 식물체 전이도 평가
  • 고일하;이상환;이원석;장윤영;
  • 광운대학교 환경공학과;한국광해관리공단;국립환경과학원;광운대학교 환경공학과;
Abstract
This study estimated stabilization efficiency of As and heavy metal contaminated agricultural soil in abandoned mine through pot experiment. Also contaminants uptake of plant (lettuce) was compared as function of amendment (limestone, steelmaking slag and the mixture of these) addition. In soil solution analysis, concentration of contaminants in soil solutions which added limestone or steelmaking slag were lower than that of the mixture. Especially in As analysis, concentration with 5% (wt) addition of steelmaking slag showed the lowest value among those with other amendments. This seems that As stabilization happens through Fe adsorption during precipitation of Fe by pH increasing. Leachability of As in stabilized soil by TCLP was represented similar result with soil solution analysis. However leachability of heavy metals in stabilized soil was similar with that of non-stabilized soil due to dissolution of alkali precipitant by weak acid. Contaminants uptake rate by plant was also lower when limestone or steelmaking slag was used. However this study revealed that concentration of contaminants in soil solution didn't affect to the uptake rate of plant directly. Because lower $R^2$ (coefficient of determination) was represented in linear regression analysis between soil solution and plant.

Keywords: Stabilization;Soil solution;Plant uptake;As;Heavy metal;

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This Article

  • 2013; 18(7): 63-72

    Published on Dec 30, 2013

  • 10.7857/JSGE.2013.18.7.063
  • Received on Nov 25, 2013
  • Revised on Dec 3, 2013
  • Accepted on Dec 3, 2013