珠江三角洲河口及邻近海区沉积物中含氯有机污染物的分布特征

The distributing characteristics of organochlorine compounds contaminants in sediments of Pearl River Delta and nearby sea area

对采自珠江三角洲河口及其邻近海区的表层沉积物样品中含氯有机污染物多氯联苯和有机氯农药进行了定量分析测定，并探讨了其在珠江三角洲地区的分布特征．结果表明，沉积物已受到了一定程度的污染，其中澳门内港和广州河段的样品已经受到严重的有机氯污染.从有机氯农药来看，其分布为澳门内港＞澳门南环湾＞珠江广州河段＞狮子洋＞伶仃洋＞西江；多氯联苯的分布为广州芳村＞澳门内港＞珠江广州河段＞狮子洋＞伶仃洋≈西江．

This paper presents the study of organochlorine pesticides and PCBs in surface sediment samples collected from Pear River Delta and nearby sea area. Concentrations of pesticides and PCBs are quantitatively measured and distributing characteristics of these compounds in the area are discussed. The results reveal that the sediments have been contaminated to a certain extent. Samples from Guangzhou Channel and Macao Harbor have been heavily contaminated.The orde as sums of DDTs and BHCs in sediments is:Macao Harbor>Macao Nanhuanwan>Guangzhou Channel>Shiziyang >Lingdingyang>West River, and as PCBs is: Guangzhou Fangcun>Macao Harbor>Guangzhou Channel>Shiziyang > Lingdingyang≈West River.