河南平原浅层地下水有机污染物污染特征研究

Exploration of Shallow Groundwater Organic Pollution Characteristics In Henan Plain

河南省浅层地下水(泛指地下水位埋深<60 m)微量有机污染物检测样总计1583组,测试项目29项,检出率较高(53.9%),超标率较低(1.1%),有机污染总体较轻。普遍检出的微量有机污染物有单环芳烃、多环芳烃、卤代烃、氯代苯、有机氯农药等5大类22项。单因子检出最多为甲苯,检出率39.7%;其次是1,2-二氯乙烷,检出率11.8%;其它指标检出率均小于10%。仅在淮河冲积平原区的中南部,呈点状分布有超标点,污染因子为苯、1,2-二氯丙烷和苯并(a)芘。

There are total 1583 groups organic pollution test samples about shallow groundwater in Henan province(general reference the groundwater buried depth<60m).The 20 test items are involved.The results show that the detection rate is a little high(53.9%)and the excess rate is low(1.1%),therefore in general the organic pollution is slight.The are 5 classes 22 items microscale organic pollutions had been widely discovered in this time,such as monocyclic aromatic hydrocarbon,polycyclic aromatic hydrocarbons,halogenated hydrocarbon,chlorobenzene,organochlorine pesticide.The highest content single factor that had been discovered is toluene with a rate of 39.7%.The second highest is 1,2-dichloroethane with the rate of 11.8%.The detection rates of the other indicators are all lower than 10%.The are only some excess point distributions in the south central alluvial plain of huaihe,the pollution factors are benzene,1,2-dichloropropane and benzo(a)pyrene.