新疆库尔勒市平原区地下水有机污染评价

Evaluation of groundwater organic pollution in the plain area of Korla City,Xinjiang

本文采用有机污染现状评价法和环境影响度评价法对新疆库尔勒市平原区22组地下水水样进行评价,并对其影响因素进行了分析.地下水有机污染物检测结果显示,无有机污染物超标项,有6项有机污染物检出,分别为反-1,2-二氯乙烯、顺-1,2-二氯乙烯、三氯甲烷、1,2-二氯乙烷、四氯乙烯和甲苯,检出率最高的指标是甲苯(检出率为27.3%),其余5项检出率均为4.5%.地下水有机污染现状评价结果表明,研究区内甲苯未污染占72.7%、轻度污染占27.3%,其余5项未污染占95.5%、轻度污染占4.5%.地下水环境影响度评价结果表明,研究区地下水体中的有机污染物对人和环境没有明显的潜在危害.库尔勒市平原区地下水中有机污染物检出主要受工业污染源、生活污染源、农业污染源、土地利用类型和包气带岩性的影响.

The evaluation method of organic pollution status and Ambient Severity evaluation method were used to evaluate the groundwater quality based on the 22 groundwater samples form the plain area in Korla City,Xinjiang. And the influencing factors of organic pollution were analyzed. The groundwater organic pollutant detection results showed that no organic contarinant exceeded the standard, and six organic pollutants were detected in groundwater, including trans-1,2-dichloroethylene,cis-1,2-dichloroethylene,trichloromethane,1,2-dichloroethane,tetrachlorethylene and toluene（ with the highest detection rate of 27.3%）. The detection rate of other five organic pollutants were 4.5%. The results of organic pollution status evaluation showed that for toluene non-polluted samples accounted for 72.7%,and lightly polluted samples accounted for 27.3%,for the other five organic pollutants, non-polluted samples accounted for 95. 5%, and lightly polluted samples accounted for 4.5% in the study area. The results of Ambient Severity evaluation showed that organic pollutants in groundwater had no obvious potential danger to human health and environment. The organic pollutants in the groundwater were mainly from industrial pollution sources, domesticpollution sources,agricultural pollution sources,land use types and lithology of vadose zone.