长江河口外海柱状沉积物重金属来源判别

Sources Identification of Heavy Metals of Changjiang Estuary

调查采集了长江口外嵊泗群岛海域4个站位的沉积物柱状样品,对其Cu、Pb、Zn、Cd、Hg、As等6种重金属含量以及农药、大肠菌群等参数进行了分析评价,研究认为:(1)综合输入通量和重金属富集因子,该区的沉积物来源主要为长江;(2)Zn污染来源有可能是橡胶和轮胎制造和机油使用等;(3)Cd污染主要来源于电镀工业及有色金属生产,也有杀虫剂的使用和生活污水排放、垃圾焚烧等;(4)Hg主要来源于电子工业,是当今信息产业发展的必然产物。

The research on four kinds of heavy metals including Cu,Pb,Zn,Cd,Hg and As in sediments was presented in south estuary of the Changjiang River in spring and 4 samples were conducted. It comparesd the difference of Cu,Pb,Zn,Cd,Hg and As of sediments in time and space,at the same time considered dynamic conditions,results showed that some conclusions were as follows： the area was not evidently polluted by heavy metals except for light contaminated of Cu with the first sediment quality standard. Cu was the dominate contaminated factor in surface sediments. The lower contaminated of surface sediments was showed offshore of north estuary of Changjiang in space.Compared with the 2011＇s data,the heavy metals contents was decreased except for Pb which hints surface sediments quality was improved.