Distribution characteristics of organochlorine pesticides in river surface sediments in Song-Liao watershed
Wang, H-Zheng.; He, M-Chang.; Lin, C-Ye.; Quan, X-Chun.; Guo, W.
Ying Yong Sheng Tai Xue Bao 18(7): 1523-1527
2007
ISSN/ISBN: 1001-9332 PMID: 17886645 Document Number: 609213
With gas chromatography-electron capture detector ( GC-ECD), this paper analyzed 13 kinds of organochlorinae pesticides ( OCP) in surface sediments collected from 22 sites of Song-Liao water system. The results showed that the total concentration of OCP varied from 3. 06 to 23. 24 ng center dot g(-1) in Daliao River system and from 4. 26 to 18. 45 ng center dot g (-1) in Songhuajiang River system. The most dominant OCP pollutant in the sediments in Song-Liao Watershed was HCH, but there existed different pollution tendency in the two subsystems. In Songhuajiang River, there were also relatively high concentrations of DDT. High concentration gamma-HCH was observed among the isomers of HCH in the whole watershed, which exceeded the initial affecting concentration and could potentially do toxic effect on the water creatures.