水资源保护2012，Vol.28Issue(5)：19-24,6.DOI:10.3969/j.issn.1004-6933.2012.05.004
阳宗海表层沉积物中的重金属生态风险评估
Evaluation of ecological risk of heavy metals in surface sediments from Yangzonghai Lake
摘要
Abstract
The concentrations of ten heavy metals in 25 groups of surface sediment samples from Yangzonghai Lake were analyzed. The results show that the mean concentrations of Ti, Mn, Zn, V, Cr, Cu, Ni, Co, Pb, and As were higher than their natural background values. Cluster analysis indicated that Zn, Cr, Pb, and As were highly correlated whith one another and mainly came from human activities, and Ti, Mn, V, Cu, Ni, and Co were also well correlated and mainly came from the natural lenvironment. The evaluation of the single-factor pollution index indicated that the ten heavy metals were enriched to a certain degree, all reaching the level of medium pollution. The enrichment of As, Cu, and Cr was more prominent than that of the other heavy metals. The Hakanson potential ecological index was used to evaluate the ecological risk of heavy metals in surface sediments of Yangzonghai Lake. The results indicate a slight ecological risk of heavy metals in surface sediments of the lake as a whole, and a medium-level ecological risk of heavy metals in some southern parts of the lake. The heavy metals in surface sediments of Yangzonghai Lake can be grouped in to the descending order according to their contribution to ecological risk; As, Cu, Co, Ni, Pb, Cr, V, Zn, Mn, and Ti. Of them, As was the most prominent factor of ecological risk in surface sediments of Yangzonghai Lake.关键词
沉积物/重金属/生态风险评估/阳宗海Key words
sediment/ heavy metal/ ecological risk evalution/ Yangzonghai Lake分类
资源环境引用本文复制引用
张玉玺,孙继朝,向小平,黄冠星,刘景涛,陈玺,王金翠..阳宗海表层沉积物中的重金属生态风险评估[J].水资源保护,2012,28(5):19-24,6.基金项目
中国地质科学院水文地质环境地质研究所基本科研业务费资助项目(SK200903) （SK200903）
