Seasonal Change Characteristics and Risk Assessment of Heavy Metals of the Groundwater in the Dabaoshan Mine Land

doi:10.11924/j.issn.1000-6850.2013-2941

Abstract

Abstract: In order to study the environmental risks of mining groundwater characteristics and seasonal changes caused by mining. A systematic survey and determination of Cu, Pb, Zn and Cd concentrations in the groundwater were studied in the Dabaoshan mine land. The possible environmental risk to local inhabitants via consumption and shower were assessed based on the USEPA health risk assessment model. The results showed that: the Cu, Pb, Zn and Cd concentrations in the tailing area in the wet season higher than dry season. The non-carcinogen risk values of Cu, Pb and Zn via consumption were mainly in the range of 10^-10^-10^-12, and the carcinogen risks were in the range of 10^-11^-10^-17, which would not cause harm to the health of local inhabitants. The values (Cu, Pb, Zn, Cd) of carcinogen risks in the dry season via shower were mostly higher than wet season. The health risks of Pb and Zn in the wet season were higher than the dry season, but the value of Cd risks had related with the distance to the tailing area. In the tailing area the levels of health risk were affected by the tailing discharge. Moreover, the carcinogenic risk values of Cd in the tailing area exceeded the maximum acceptable levels set by U S EPA. Therefore the pollution of Cd should be firstly taken into consideration of prevention in the groundwater of the Dabaoshan mine land.

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