【作者】 曹玲珑； 王平； 石萍； 田海涛；

【Author】 CAO Ling-long~(1,2),WANG Ping~1,SHI Ping~1,TIAN Hai-tao~1 (1.South China Sea Marine Engineering and Environment Institute,SOA,Guangzhou,510300; 2.Department of Earth Sciences,Sun Yat-sen University,Guangzhou 510275)

【机构】 国家海洋局南海海洋工程勘察与环境研究院； 中山大学地球科学系；

【摘要】 以2011年洋浦港近岸海域表层沉积物的调查资料为基础,测定洋浦港近岸海域表层沉积物中重金属和有机质的含量。利用主成分数理统计分析法研究沉积物中重金属的来源,发现前3个主成分的贡献率分别为48.76%、19.83%、13.13%,分析表明重金属主要有3个来源:工业和生活污水点源污染、农业排污和油污污染非点源污染、有机质降解的内源释放。以此为基础应用潜在生态危害指数法综合评价沉积物中重金属潜在的生态危害,结果发现洋浦港近岸海域重金属潜在生态危害轻微,7种典型重金属潜在生态危害顺序为Pb>Hg>Cd>As>Cu>Cr>Zn。洋浦湾海域受环境条件影响,近岸海域沉积物重金属的富集效应向外部海域逐渐降低,表现出较强的陆源性,应引起有关部门的注意。更多还原

【Abstract】 Based on the survey data from 2011 for the surface sediments near Yangpu Port,concentrations of heavy metals and organic matters in the surface sediments of Yangpu Bay were determined.Heavy metal contamination source analysis though principal component analysis(PCA) revealed that the contribution rates of the top three principal components were48.76%,19.83%,13.13%,respectively,indicating that the three main sources of heavy metals were as follows:industrial waste water and sewage,agricultural wastewater and oil leak,degradation of organic matter.The potential ecological risk index were calculated to evaluate heavy metals pollution in the area. The results also reveal that the Yangpu port and its surrounding sediments has no potential ecological risks for the time being.The order of potential ecological risks is Pb>Hg>Cd>As>Cu>Cr>Zn.The contents of heavy metal in surface sediments of Yangpu port inshore are significantly higher than its surrounding may have been the impact of land-based sources of pollution.更多还原