Abstract:Surface sediment samples were collected from Liaohe and Taihu.Polycyclic aromatic hydrocarbons (PAHs) and organic chlorine pesticides (OCPs) in the sediment samples were determined with GC/MS.The concentrations of the total PAHs in Liaohe and Taihu varied in the range of 120.8~22120ng/g (dry weight, dw) and 256.6 ~1709ng/g (dw), with the mean concentrations of 3281ng/g and 829.0ng/g respectively. Tetra and penta~hexa-cyclic compounds were the main PAHs compounds in the sediments of both areas and fluoranthene was predominant. The results of source apportionment indicated that PAHs in both areas were mainly due to the pyrogenic sources. SOCPs in Liaohe and Taihu were relatively lower and were dominated by β-HCH, suggesting no new source of HCHs. Equilibrium partitioning approach was used to derive the sediment quality criterias (SQCs) for PAHs and OCPs. Based on the SQCs, risk assessment was conducted to evaluate the ecological risk of PAHs and OCPs in the sediments. In some sites of Hunhe, the total sediment toxicity unit ?ESBTUFCV was larger than 1for PAHs, HCHs and DDTs, suggesting high environmental risk in Hunhe. The risk in sediment of Tai lake was acceptable for PAHs, HCHs and DDTs.
刘楠楠, 陈鹏, 朱淑贞, 祝凌燕. 辽河和太湖沉积物中PAHs和OCPs的分布特征及风险评估[J]. 中国环境科学, 2011, 31(2): 293-300.
LIU Nan-Nan, CHEN Peng, ZHU Shu-Zhen, ZHU Ling-Yan. Distribution characteratics of PAHs and OCPs in sediments of Liaohe River and Taihu Lake and their risk evaluation based on sediment quality criteria. CHINA ENVIRONMENTAL SCIENCECE, 2011, 31(2): 293-300.