Volume 39 Issue 1
Jan.  2020
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Xie Xianjun, Liu Hongxing, Gao Shuang, Su Chunli. Source identification and health risk assessment of groundwater pollution in typical sewage pits and ponds[J]. Bulletin of Geological Science and Technology, 2020, 39(1): 34-42. doi: 10.19509/j.cnki.dzkq.2020.0104
Citation: Xie Xianjun, Liu Hongxing, Gao Shuang, Su Chunli. Source identification and health risk assessment of groundwater pollution in typical sewage pits and ponds[J]. Bulletin of Geological Science and Technology, 2020, 39(1): 34-42. doi: 10.19509/j.cnki.dzkq.2020.0104

Source identification and health risk assessment of groundwater pollution in typical sewage pits and ponds

doi: 10.19509/j.cnki.dzkq.2020.0104
  • Received Date: 14 Dec 2019
  • In order to study the groundwater pollution in typical sewage pits and ponds and its potential risk to human health, based on the groundwater quality monitoring data, the source of groundwater pollution in the area was identified, and the water environment health risk assessment model was used to systematically assess the health risk of groundwater pollution in the area. The results of pollution source identification show that groundwater pollution in the first and second aquifers is serious, and the main pollution sources are industrial waste water and industrial waste residue stacked in the area. The results of health risk assessment show that the total carcinogenic risk of arsenic in the first aquifer near NO.8 pit in the area and the total carcinogenic risk of 1, 2-dichloroethane in the second aquifer on the south side of the north reservoir are 10-2 and 10-3, far higher than the acceptable risk level of 10-6 and other monitoring wells around. The overall relationship between the average carcinogenic risk of pollutants in different aquifers is as follows: the first aquifer: arsenic > 1, 2-dichloroethane; the second aquifer: 1, 2-dichloroethane > arsenic > 1, 1, 2-trichloroethane > carbon tetrachloride. Among the various exposure routes, drinking groundwater is the main exposure route for such pollutants as fluorine, arsenic, 1, 2-dichloroethane, 1, 1, 2-trichloroethane and carbon tetrachloride. The relationship between the average carcinogenic risk of four potential exposure routes of volatile organic pollutants such as 1, 2-dichloroethane is as follows: drinking groundwater > skin contact with ground water>inhaling gaseous pollutants from groundwater in outdoor air > inhaling gaseous pollutants from groundwater in indoor air. Compared with sensitive landuse, non-sensitive landuse has lower cancer risk and hazard quotient since the exposure hazards in childhood is not considered.

     

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