期刊论文

中文

环境与健康杂志

1001-5914

2009

26

5

437-438

10.16241/j.cnki.1001-5914.2009.05.003

湖南省自然科学基金资助项目（07JJ6013）； 湖南省重点学科项目；

本校为第一机构

目的 了解湘江衡阳段沉积物重金属污染特征及其生态风险.方法于2007年调查湘江衡阳段10个断面18个采样点的表层沉积物重金属(Cd、Hg、Pb、AB、Cr、Zn、Cu)污染特征.运用Hanksnson潜在生态危害指数法评价表层沉积物重金属的富集程度和潜在生态风险.结果 该区段河流沉积物重金属Cd潜在生态危害系数(E~t_r)均值为352.1,为极强生态危害程度;Hg次之,E~t_r均值为272.1,属于很强生态危害;Pb和As的Etr均值分别为150.1和104.7,为强生态危害程度;Cr、Zn、Cu的E~t_r均值小于40,为轻度生态危害.多种重金属的综合潜在生态风险指数(RI)为913.4.结论 本次调查的湘江衡阳段沉积物存在一定程度的重金属污染,且具有...

Objective To explore the characteristics and ecological risk assessment of heavy metals pollution in the fluvial sediment in Hengyang section of Xiang river. Methods The fluvial sediments in 18 sites in 10 sections of Hengyang section of Xiang river were collected for determination of heavy metals（ Cu, Zn, As, Hg, Cd, Cr, Pb） in 2007.The accumulation levels of heavy metals in the fluvial sediment and their potential ecological risks were assessed by the Hankanson potential ecological risk （PER） factors method. Results The average potential ...