摘要:
根据我国近岸海域表层沉积物6 094个站位、深层1 495个站位沉积物地球化学重金属元素(As、Cd、Cr、Cu、Hg、Pb、Zn)含量数据,运用了多元统计等数学方法对测试数据进行了处理,分析了我国近海海域沉积物重金属元素分布特征。在此基础上,根据GB 18668—2002(海洋沉积物质量)标准,运用了综合指数法对我国近海海域沉积物重金属生态地球化学进行了评价,结果表明:我国近海海域(10 m水深线以浅)清洁海域占78.93%,轻污染海域占13.80%,重污染海域占7.27%。重污染区域分布在葫芦岛附近海域、珠江入海口附近海域,轻度污染区域在长江入海口附近。样品对比分析结果显示,我国近海海域重污染主要来源于人类活动的影响。
Abstract:
Geochemical data of heavy metal, such as As, Cd, Cr, Cu, Hg, Pb, Zn, from 6 094 stations of Chinese coastal surface sediments and 1 495 stations of deep sea sediments were collected for environmental quality assessment. The data were processed with multivariate statistics and other mathematical methods in order to better reveal the distribution pattern of heavy metal elements. Following the quality criteria of marine sediments setting up by the GB18668—2002, a comprehensive index method was adopted to evaluate the ecological vulnerability of heavy minerals in the coastal sediments. Results suggest that the clean areas for 79%, slightly polluted areas for 14%, and heavily polluted areas for 7% in China's coastal waters. The heavily polluted areas are located near Huludao, Liaoning Province and the Pearl River estuary, the slightly polluted area is near the Yangtze River estuary. Pollutants are mainly from human activities.
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