湘中某矿区地下水重金属污染特征及健康风险评估

doi:10.11934/j.issn.1673-4831.2018.11.010

Abstract

Abstract:

Taking groundwater of a mining area in central Hunan as the research object, concentrations of 15 heavy metals in 14 monitoring wells in the mining area were monitored and analyzed. The results show that As, Sb, Co, Fe and Mn concentrations in the groundwater were 14.3%, 64.3%, 50.0%, 10.7% and 14.3% greater than the standards of GB/T 14848-2017 and GB 3838-2002 respectively, with the maximum concentrations of 5.4, 30.4, 0.9, 34.0 and 18.3 times of the standards. The significantly greater concentrations of Sb indicated that the pollution of Sb in the groundwater is the most serious. The results of the pollution assessment show that the proportion of heavy pollution of the groundwater in the mining area was 78.5% in dry season, while the proportion of heavy pollution was 50% in the wet season. The possible health risk of the polluated groundwater to local inhabitants were assessed based on the the groundwater health risk assessment model. The results show that the health risk of the polluted groundwater was mainly from As, Sb and Co via consumption. The carcinogenic risk value of As via consumption was in the range of 1.08×10^-3-2.89×10^-3, which far exceeded the limit for acceptable maximum carcinogenic risk level. The maximum non-carcinogenic hazard quotient of As, Sb and Co were 1.48×10², 89.2, 69.0, respectively, all above the acceptable level, which can be harmful to the health of the local sensitive population through drinking groundwater.

Key words: mine area, groundwater, heavy metal pollution, health Risk assessment

CLC Number:

X523
X820.4

WU Wen-hui, ZOU Hui, ZHU Gang-hui, LIAO Yue-hua, PAN Hai-ting, XIAO Chen-chang, FAN Juan, LI Lu. Heavy Metal Pollution Characteristics and Health Risk Assessment of Groundwater of a Mine Area in Central Hunan[J]. Journal of Ecology and Rural Environment, 2018, 34(11): 1027-1033.

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Heavy Metal Pollution Characteristics and Health Risk Assessment of Groundwater of a Mine Area in Central Hunan

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