Research On The Geochemical Feature And Contamination Assessment For Trace Metals In The Sediments From Zhejiang Offshore

This paper was based on the surficial sediments and sediment cores from Zhejiang offshore, the chemical analysis put emphasis on trace metals, and developed the geochemistry investigation and environmental quality assessment of surficial sediments and sediment cores. Firstly, this paper analyzed the basic geochemical feature of trace metals in the surficail sediments, and geochemistry statistic feature by means of clustering and correlation analysis, and according it diviced three sedimental geochemical area;the unpolluted sample was determinated by analysis of 210Pb, and was regarded as the sample for background value,then the author got the background value of trace metals in sediment from Zhejiang offshore by the equalizing value and standard deviation after verification of state property ;throughput analysis for basic geochemical feature of trace metals in the sediment cores , the vertical profile geochemical field was upbuilded, at the same time, the history of contemination was anatomied in sediment for Zhejiang offshore; Finally, the author made use of grey clustering and latent ecological hazard index to assess the status of pollution and the degree of latent ecological hazard of the trace metals in the surficial sediments from Zhejiang offshore.