Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Assessment of health risk associated with arsenic exposure from soil, groundwater, polished rice for setting target cleanup level nearby abandoned mines

  • Lee, Ji-Ho (Chemical Safety Division, Department of Agro-Food Safety, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Won-Il (Chemical Safety Division, Department of Agro-Food Safety, National Academy of Agricultural Science, Rural Development Administration) ;
  • Jeong, Eun-Jung (Chemical Safety Division, Department of Agro-Food Safety, National Academy of Agricultural Science, Rural Development Administration) ;
  • Yoo, Ji-Hyock (Chemical Safety Division, Department of Agro-Food Safety, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Ji-Young (Chemical Safety Division, Department of Agro-Food Safety, National Academy of Agricultural Science, Rural Development Administration) ;
  • Lee, Je-Bong (Chemical Safety Division, Department of Agro-Food Safety, National Academy of Agricultural Science, Rural Development Administration) ;
  • Im, Geon-Jae (Chemical Safety Division, Department of Agro-Food Safety, National Academy of Agricultural Science, Rural Development Administration) ;
  • Hong, Moo-Ki (Chemical Safety Division, Department of Agro-Food Safety, National Academy of Agricultural Science, Rural Development Administration)
  • Received : 2011.01.19
  • Accepted : 2011.02.25
  • Published : 2011.02.28
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Abstract

This study focused on health risk assessment via multi-routes of As exposure to establish a target cleanup level (TCL) in abandoned mines. Soil, ground water, and rice samples were collected near ten abandoned mines in November 2009. The As contaminations measured in all samples were used for determining the probabilistic health risk by Monte-Carlo simulation techniques. The human exposure to As compound was attributed to ground water ingestion. Cancer risk probability (R) via ground water and rice intake exceeded the acceptable risk range of $10^{-6}{\sim}10^{-4}$ in all selected mines. In particular, the MB mine showed the higher R value than other mines. The non-carcinogenic effects, estimated by comparing the average As exposure with corresponding reference dose were determined by hazard quotient (HQ) values, which were less than 1.0 via ground water and rice intake in SD, NS, and MB mines. This implied that the non-carcinogenic toxic effects, due to this exposure pathway had a greater possibility to occur than those in other mines. Besides, hazard index (HI) values, representing overall toxic effects by summed the HQ values were also greater than 1.0 in SD, NS, JA, and IA mines. This revealed that non-carcinogenic toxic effects were generally occurred. The As contaminants in all selected mines exceeded the TCL values for target cancer risk ($10^{-6}$) through ground water ingestion and rice intake. However, the As level in soil was greater than TCL value for target cancer risk via inadvertent soil ingestion pathway, except for KK mine. In TCL values for target hazard quotient (THQ), the As contaminants in soil did not exceed such TCL value. On the contrary, the As levels in ground water and polished rice in SD, NS, IA, and MB mines were also beyond the TCL values via ground water and rice intake. This study concluded that the health risks through ground water and rice intake were greater than those though soil inadvertent ingestion and dermal contact. In addition, it suggests that the abandoned mines to exceed the risk-based TCL values are carefully necessary to monitor for soil remediation.

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References

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