Distribution characteristics and risk evaluation of heavy metals in sediment of Yalu River estuary and its adjacent shallow sea area  

作　　者：刘月[1] 程岩[1] 李富祥[1,2] 刘敬伟[1] 张亮[1] 高建华[3] 

机构地区：[1]辽东学院城市建设学院,辽宁丹东118003 [2]辽宁师范大学城市与环境学院,辽宁大连116029 [3]南京大学海岸与海岛开发教育部重点实验室,江苏南京210093

出　　处：《环境污染与防治》2011年第7期I0002-I0007,9,共6页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目（No.40871019、No.40976051）; 辽东学院青年科研基金资助项目（No.2006-Z07）

摘　　要：采用重金属的富集系数和多金属污染度分析鸭绿江口及毗邻浅海沉积物重金属的分布特征。结果表明：鸭绿江口及毗邻浅海沉积物Cu、Hg和Cd属于重要的污染因子;多金属污染度高强度分布区与高含沙量区存在对应关系,但对重金属富集影响更大的是人类活动。采用潜在生态风险指数法与生物效应阈值浓度法2种评价方法进行研究区的生态风险评价,结果显示,参比工业化前全球沉积物重金属最高值为背景值进行的潜在生态风险指数法评价结果与生物效应阈值浓度法的评价结果一致,即研究区的生态风险评价结果属于轻微级,并具有更大范围内的可比性,但研究区沉积物中重金属的相对污染程度偏高。The present paper dealt with the distribution character- istics of heavy metals in sediment of Yalu River estuary and its adjacent shallow seas by enrichment coefficients and multi-metallic pollution degree. The results indicated that the enrichment grade of the heavy metals in the sediment of the studied area were higher than that in its adjacent land areas, and the elements of Cu, Hg and Cd were the key pollution factors. The high value distribution zone of multi-metallic pollution degree and the zone with high sand content were obviously corresponding, but the human activities were more influential to the distribution of heavy metals. The ecological risk was evaluated with two indicators of potential ecological risk index and bio-effeet concentration. The results proved that ecological risk level in Yalu River estuary and its adja- cent shallow seas was generally low in reference to the high- est value of heavy metals in the global sediments before in- dustrialization as the background value, which was the same as the evaluation result of bio-effeet concentration, and was comparative in a large area. But the relative pollution degree in the studied area was still on the high side.

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分 类 号：G255.2[文化科学—图书馆学]