Identification and Risk Assessment of Priority Contaminants for Groundwater Control in an Industrial Park in Northwest China
To explore the current status of groundwater contamination in industrial parks,to identify priority control pollutants in groundwater,and to understand the health risks caused by exposure to pollutants.Based on the monitoring results of groundwater pollutants,the potential hazard index and comprehensive evaluation method were used to identify the priority control pollutants in groundwater,and a health risk evaluation model was used to evaluate the health risks from exposure to the priority control pollutants.The results show that,ammonia nitrogen,manganese,lead,cadmium,chloride,trichlorometh-ane and other pollutants in groundwater exceeded the standard,and the contamination index ranged from 0.005 to 14.349.The preferred control pollutants in groundwater included ten pollutants such as dichloromethane,lead,arsenic,mercury and other pollutants.The cumulative non-carcinogenic risk of children and adults exposed to the contaminants was small,and there was a carcinogenic risk from exposure to trichloromethane and mercury via drinking water intake and skin contact,and a carcinogenic risk from arsenic exposure via drinking water;and there was a carcinogenic risk from arsenic exposure in adults via the skin contact route.The exceedance of some pollutants in groundwater in industrial parks is prominent,and the focus should be on the superior control pollutants,which have different degrees of health risks for children and adults.
groundwaterpriority industriespriority control pollutantshealth risk assessmentindustrial parks