| The 19 soil samples and one sediment core were collected from near the banks and in estuary of the Minjiang River.The concentrations of OCPs in the samples were determined by GC-ECD with the internal standard method.The results showed that the concentrations of OCPs,HCHs,DDTs in soils near the banks of Minjiang were in the ranges of 4.31-877.80 ng·g-1(with a mean 74.13 ng·g-1),1.32-24.01 ng·g-1(7.50 ng·g-1),1.67-876.49 ng·g-1(66.64 ng·g-1),respectively.Through the study of the vertical distribution characteristics of OCPs in the area,the pollution history of OCPs in the Minjiang estuary was discussed.The concentrations of HCHs and DDTs in the core ranged from 0.34-11.72 ng·g-1and 1.12-31.04 ng·g-1,respectively.The results also showed that the soils and cores in the area have polluted lightly by DDTs,but not been polluted by HCHs.Upper section of the sediment core,o,p′-DDT was the main composition,which indicated that new DDTs may be still used recently in the Minjiang area.The vertical changes of OCPs reflected basically their production and application history in banks of Minjiang River,Fujian Province. |
