摘要
近年来长江口──杭州湾表层沉积物中BHC与DDT的含量与以前表层沉积物有关资料的对比，以及经较高精度定年柱状样中BHC与DDT的会向分布特征均显示，有机氯农药广泛使用作为一个污染事件,自开始到逐渐消退均在沉积记录中得到了较好的反映,研究结果表明，污染物的分子地层学记录对恢复有机污染史具有重要意义.尽管近年来表层沉积物中有机氯农药含量己经降至很低，但是由于细颗粒沉积物再悬浮以及海洋浮游生物对有机氯农药的高度富集，其对海洋环境的影响仍然不可忽视.
According to the variations of BHC and DDT contents in the surface sediments of Changjiang Estuary-Hangzhou Bay since the last decade as well as the vertical changes of BHC and DDT contents in sedimentary cores datedby 210Pb, it is suggested that organochlorinated Pesticides pollution history can be reconstructed by stratigraphical records.Although very low BHC and DDT contents were observed in recent surface sediments, their concentrahons aught havebeen still quite high for a long time in suspended material due to reworking of fine sediments and the enrichment of organochlorinated pesticides by plankton.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
1999年第3期206-210,共5页
China Environmental Science
基金
浙江省自然科学基金!497003
国家海洋局青年科学基金!97107
中日合作项目
关键词
长江口
杭州湾
有机氯农药
地层学记录
污染史
Chanjiang Estuary-Hangzhou Bay
organochlorinated Pesticides
stratigraphical records
pollution history
