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Evaluation of Stabilization of Arsenic in Contaminated Soil Taken from Farmland Near Abandoned Metal Mine

폐금속광산 주변 오염 농경지에서 비소의 안정화 효율 평가

Su Ho Han1
,
Myung Chae Jung1*
,
Jeong Wook Kim1
,
Kyung Wook Yoon1
,
Seon Ki Min1
,
So Yeon Park2
,
Ki Tae Sim2
한 수호1
,
정 명채1*
,
김 정욱1
,
윤 경욱1
,
민 선기1
,
박 소연2
,
심 기태2
1Department of Energy Resources and Geosystem Engineering, Sejong University, Seoul 05006, Korea
2Chemicals Research Division, National Institute of Environment Research
1세종대학교 지구자원시스템공학과
2국립환경과학원 화학물질연구과
*Corresponding Author
28 February 2021. pp. 8-16
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Abstract

This study has evaluated the stabilization of As contaminated paddy and cultivated soils by pot experiments for rice and lettuce. Various ratios of limestone (L) and steel slag (S) were mixed with the soils in each pot. The soils were taken from before and after pot experiments, and analyzed for As extracted by sequentially (Wenzel method) and totally (aqua regia method).. Paddy soils amended with L (0.5%) and L (1.0%) + S (1.0%) showed increasing fraction 2 (specifically bound As) compared with control soil. Arsenic concentrations in rice grain grown on the amended soils decreased 14% and 12% compared with those on the control soil, respectively. According to sequential extraction of As in cultivated soils, the fractions 1~3 were decreased due to stabilization of As by the soil amendment, especially for S (1.0%), S (3.0%) and L (1.0%) + S (1.0%). In addition, relatively low As concentrations were found in lettuce grown on amended soils with L (0.5%) and L (1.0%) + S (1.0%). Therefore, it can be suggested that soil amendments with L (0.5%) or L (1.0%) + S (1.0%) were suitable for enhancing stabilization of As in the study area.

Keywords
As
Abandoned Mine
Stabilization
Bioavailability
Sequential Extraction
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Information
  • Publisher :The Korean Society of Soil and Groundwater Environment
  • Publisher(Ko) :한국지하수토양환경학회
  • Journal Title :Journal of Soil and Groundwater Environment
  • Journal Title(Ko) :지하수토양환경
  • Volume : 26
  • No :1
  • Pages :8-16
  • Received Date : 2020-05-15
  • Revised Date : 2020-05-22
  • Accepted Date : 2020-12-07
  • DOI :https://doi.org/10.7857/JSGE.2021.26.1.008
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