Affiliations: School of Chemical Engineering and Technology, Tianjin
University, Tianjin 300072, China | Tianjin Environmental Protection Bureau, Tianjin
300191, China
Abstract: Persistent organochlorine compounds were analyzed by means of GC-ECD
in surface sediment samples from two selected rivers in Tianjin, Haihe River
and Dagu Drainage River. A total of 16 surface sediment sites were selected
along the both rivers. The frequency of detection of T-HCH and T-DDT in
sediment samples both was up to 100%, which illustrated that the contamination
of HCH and DDT was widespread in Haihe and Dagu Drainage Rivers. Results
indicated that the concentrations of vadous pesticides in sediments from Haihe
River were in the range of 3.30–75.96 ng/g dw for T-HCH and
1.57–211.57 ng/g dw for T-DDT. Compared with Haihe River, Dagu Drainage
River was contaminated by HCHs and DDTs along the all locations and the values
of T-HCH and T-DDT residues in sediments ranged from 2.30 to 124.61 ng/g dw and
from 11.28 to 237.30 ng/g dw, respectively. The possible pollution sources were
analyzed through monitoring results of organochlorine pesticides (OCPs) residues
in sediments from the two rivers. The investigation also indicated that HCH was
still used as pesticide in Tianjin partial area.
Keywords: Haihe River, Dagu Drainage River, sediment, OCPs, DDT, HCH
