莱州湾及其毗邻河流沉积物中的有机氯农药
Organochlorine pesticides in sediments of Laizhou Bay and its adjacent rivers, North China.
机构信息
Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research, CAS, Yantai 264003, China.
出版信息
Mar Pollut Bull. 2011 Nov;62(11):2543-7. doi: 10.1016/j.marpolbul.2011.08.018. Epub 2011 Sep 15.
Organochlorine pesticides (HCHs, DDTs and HCB) have been investigated in sediments of Laizhou Bay and its adjacent rivers. The average concentrations of HCHs, DDTs and HCBs are 0.09ng/gdw, 0.59 and 0.05 for marine sediments and 0.55, 8.6 and 1.1 for riverine sediments, respectively. Laizhou Bay is less contaminated by HCHs and DDTs in comparison with other coastal regions around the world, including the other two biggest bays in Bohai Sea. Fresh input of lindane and dicofol-type DDT were found in several riverine sites. Relatively strong TOC-dependence of HCB distribution in the entire studied area suggested no point source existed and/or water-sediment equilibrium achieved. No significant difference of α/γ-HCH ratios have been observed between marine and riverine sediments. However, o,p'-DDT/p,p'-DDT ratios varied largely between the two regions.
有机氯农药（HCHs、DDTs 和 HCB）已在莱州湾及其附近河流的沉积物中进行了研究。海洋沉积物中 HCHs、DDTs 和 HCB 的平均浓度分别为 0.09ng/gdw、0.59 和 0.05，而河流沉积物中的浓度分别为 0.55、8.6 和 1.1。与世界其他沿海地区，包括渤海的另外两个最大海湾相比，莱州湾受 HCHs 和 DDTs 的污染程度较低。在几个河流站点发现了林丹和三氯杀螨醇型 DDT 的新鲜输入。整个研究区域 HCB 分布与 TOC 的强烈相关性表明不存在点源和/或达到了水-沉积物平衡。海洋和河流沉积物之间的α/γ-HCH 比值没有观察到显著差异。然而，o,p'-DDT/p,p'-DDT 比值在这两个区域之间差异很大。
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