摘要
对珠江口伶仃洋海底表层沉积物中重金属的分布规律进行了研究,并利用瑞典科学家Lars Hakanson的潜在生态危害指数法对重金属的生态危害程度进行了评价。研究结果表明,珠江口伶仃洋西岸附近的海底表层沉积物的重金属含量大于伶仃洋东岸附近的海底表层沉积物的重金属含量,重金属Zn、Cu、Cr、Cd、As和Hg的含量总体上表现为由西北向东南逐渐减小。生态危害评价结果显示,研究区内除4个站位为生态危害中等外,其余47个站位为生态危害轻微,海底表层沉积物重金属的污染程度顺序为Cd>Hg>Cu>As>Pb>Cr>Zn。
This paper dealt with the distribution of heavy metals in surface sediments from the Lingdingyang of the Pearl River Estuary, and the method of potential ecological risk index presented by Lars Hakanson was used to assess the heavy metal＇ s ecological risk. The results showed that the mental contents of surface sediments from west offshore is bigger than that from east offshore. The contents of Zn, Cu, Cr, Cd, As and Hg appear gradually degressive from northwest to southeast. The assessment result of the heavy metals＇ ecological risk revealed that except four stations, which belongs to middle potential ecological risk, the other forty seven stations belongs to slight potential ecological risk. The order of polluting degree of these heavy metals in surface sediments from the Lingdingyang of the Pearl River Estuary is Cd 〉 Hg 〉 Cu 〉 As 〉 Pb 〉 Cr 〉 Zn.
出处
《南海地质研究》
2006年第1期52-59,共8页
Gresearch of Eological South China Sea
关键词
生态危害评价
重金属
沉积物
伶仃洋
assessment of ecological risk heavy metals sediments Lingdingyang
作者简介
石要红，女，1966年生，在职博士研究生，教授级高工，主要从事海洋工程地质、环境地质研究。
