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为了解华东(江苏省、上海市、浙江省和福建省)沿海滩涂表层沉积物中As、Cd、Cr、Cu、Hg、Pb、Zn等重金属含量特征、来源及污染风险.采用数理统计、相关性分析、因子分析等方法对华东沿海滩涂区表层沉积物1 906件样品的As、Cd、Cr、Cu、Hg、Pb、Zn等7种重金属进行了系统研究.结果显示华东沿海滩涂区表层沉积物中As、Cd、Cr、Cu、Hg、Pb、Zn等7种重金属总体含量不高,其中江苏省沿海滩涂表层沉积物重金属总体含量较低,上海、浙江沿海滩涂表层沉积物重金属总体含量较高;上海、浙江沿海滩涂表层沉积物重金属除了自然成因,受人为活动影响较大,江苏沿海表层滩涂沉积物受人为活动影响相对较轻,其中Hg在上海、浙江、福建滩涂受人为活动影响尤为严重,Cd、Cu在上海、浙江滩涂受人为活动影响尤为严重.采用海洋沉积物污染指数和平均沉积物质量基准商进行评价,结果显示,华东沿海滩涂区沉积物总体污染物生态风险较低,江苏省和福建省滩涂生态风险较低,上海市和浙江省滩涂生态风险相对较高.
In order to understand the sources, pollution and sources of heavy metals such as As, Cd, Cr, Cu, Hg, Pb, Zn and other heavy metals in coastal sediments of East China Sea (Jiangsu, Shanghai, Zhejiang and Fujian Provinces) Cd, Cr, Cu, Hg, Pb, Zn and other heavy metals in 1 906 samples of surface sediments in coastal areas along the East China Sea were studied systematically by means of sex analysis and factor analysis.The results showed that surface sediments The contents of As, Cd, Cr, Cu, Hg, Pb, Zn and other seven heavy metals in the sediments were low, of which the total heavy metal concentrations in the surface sediments of coastal beaches in Jiangsu Province were relatively low. In addition to the natural causes, the heavy metals in surface sediments of coastal beaches in Shanghai and Zhejiang Province are greatly influenced by human activities. The sediments of surface tidal flat in coastal area of Jiangsu Province are relatively less affected by anthropogenic activities, especially Hg in Shanghai, Zhejiang and Fujian beaches Serious, Cd, Cu in Shanghai, Zhejiang tidal flat affected by human activities is particularly serious.Using the marine sediment pollution index and the average sediment quality benchmark for evaluation The results showed that the overall ecological risk of sediments in the coastal areas of East China Sea was lower, the ecological risk of beach in Jiangsu Province and Fujian Province was lower, and the ecological risk of beach in Shanghai and Zhejiang Province was relatively high.