Spatial Distribution,Source Apportionment and Health Risk Assessment of Inorganic Pollutant in Groundwater in Eastern Plain of Xinjiang
Groundwater is the main or even the only source of drinking water in the eastern plain of Xinjiang.The pollution status of inorganic components in groundwater and their negative effects on human health are still unclear.The concentrations of common inorganic components in 183 groundwater samples were determined,and the spatial distribution characteristics of pollutants were revealed by GIS technology,positive matrix factorization(PMF)model was used for source apportionment,and the health risks of potential sources were quantified by coupling Monte Carlo simulation(MCS)and PMF based on USEPA health risk assessment model.The groundwater quality in the eastern plain of Xinjiang was mainly affected by SO42-and Cl,and 30.60％and 17.49％of the groundwater exceeded the limit of national drinking water standard(250 mg·L-1),respectively,the high value points are concentrated in Santanghu Town of Balikun County,the southeast of Gaochang District and the east of Shanshan County.PMF analyzed six potential sources of inorganic components in groundwater,including leaching and evaporation concentration,aquifer lithology,agricultural activity,biogeochemical process,redox environment and geological environment background,the contribution rates were 82.43％,7.64％,6.87％,1.96％,0.80％and 0.30％respectively.The results of health risk assessment show that Cl-was the main inorganic pollutant harmful to human health,and the non-carcinogenic risk of adults and children could be neglected.The contribution rate of leaching and evaporation concentration to the non-carcinogenic risk of adults and children were more than 95.00％.Considering the safety of drinking water,the high value area of Cl-should be selected as the main pollution management area.
groundwaterinorganic pollutantspatial distributionMonte Carlosource resolutionhealth riskeastern plain of Xinjianghydrogeologyenvironmental geology
NETL
NSTL
万方数据
