Risk Assessment of Arsenic by Human Exposure of Contaminated Soil, Groundwater and Rice Grain

오염된 토양, 지하수 및 쌀의 인체노출에 따른 비소의 위해성 평가

  • Lee Jin-Soo (School of Civil, Urban and Geosystem Engineering, Seoul National University) ;
  • Chon Hyo-Taek (School of Civil, Urban and Geosystem Engineering, Seoul National University)
  • 이진수 (서울대학교 지구환경시스템공학부) ;
  • 전효택 (서울대학교 지구환경시스템공학부)
  • Published : 2005.12.01

Abstract

Environmental survey from some abandoned metal mine areas was undertaken on to assess the risk of adverse health effects on human exposure to arsenic influenced by past Au-Ag mining activities. Elevated levels of As were found in tailings from the studied mine areas. This high concentration may have a impact on soils and waters around the tailing piles. In order to perform the human risk assessment, chemical analysis data of soils, rice grains and waters fur As have been used. The HQ values fer As via the rice grain and groundwater consumption were significantly higher compared with other exposure pathways in all metal mine areas. However, there were minimal soil and water dermal contact risks. The resulting Hl values of As from the Dongil, Okdong and Hwacheon mine areas were higher than 5.0, and their toxic risk due to drinking water and rice grain was strong in these mine areas. The cancer risk of being exposed to As by the rice grain route from the Dongil, Okdong and Hwacheon mine areas was $5.2\times10^{-4},\;6.0\times10^{-4}\;and\;8.1\times10^{-4}$, respectively. The As cancer risk via the exposure pathway of drinking water from these mine areas exceeded the acceptable risk of 1 in 10,000 fer regulatory purposes. Thus, the daily intakes of groundwater and rice grain by the local residents from the Dongil, Okdong and Hwacheon mine areas can pose a potential health threat if exposed by long-term arsenic exposure.

Keywords

Arsenic (As);Exposure pathway;Toxic risk;Cancer risk;Human risk assessment

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