Abstract:

This study collected 111 water samples from the Three Gorges Reservoir Region.The concentrations of OCPs in the samples were determined by GCECD with the internal standard method.The results showed that OCPs indicators were 100% in water.The HCHs content range were αHCH 010~608 ng/L,βHCH 048~1020 ng/L,γHCH 009~843 ng/L,δHCH 007~1053 ng/L.Detection rate of DDT compounds were mostly lower,the content range:p,p'DDE 001~1914 ng/L,p,p'DDD 004~213 ng/L,p,p'DDT 007~164 ng/L.In the majority of sampling points,HCHs were detected.On the total content of the mainstream sections,the HCHs was higher than DDTs.Key locations and section content in the reservoir area,HCHs was higher than the cross section,DDTs was lower than the cross section.The distribution of HCHs in the main stream of water body was jump volatility,and every time the content of volatility should be higher than the one before.Reservoir mainstream key location water was main βHCH,but δHCH also exist.Key location did not detected DDT,indicating that the smaller contribution to the reservoir water body.Through ratio analysis,atmospheric input is the main source in reservoir water body of DDT