摘要
通过测定南沙河水体中重金属的含量,探讨重金属的分布特征,并采用地累积指数法和潜在生态危害指数法对沉积物中重金属污染程度和潜在生态危害进行了评价。结果表明,南沙河水体重金属的污染较轻,沉积物的重金属地累积指数分级在0～3之间,属于无污染至中度污染水平,各重金属的污染程度为Zn>As>Pb>Cu>Cr>Cd。沉积物重金属呈现由较轻到中等的生态风险,以Cd的生态风险为主。
By analyzing the content of heavy metals of water substance in Nansha River,the distribution characteristics of heavy metals were discussed.Index of geo-accumulation and potential ecological risk of heavy metals in sediment was assessed by the method of potential ecological risk index.Results indicated：Nansha River doesn＇t have been polluted by heavy metals seriously.the index of geo-accumulation（Igeo）classify are between 0~3,the contamination levels are from non to middle,Various heavy metals pollution degree from high to low in turn is： ZnAsPbCuCrCd.Potential ecological risk of heavy metals in sediment exhibits light to middle,with Cd as priority risk.
出处
《中国环境监测》
CAS
CSCD
北大核心
2012年第3期18-22,共5页
Environmental Monitoring in China
基金
国家科技重大专项"水体污染控制与治理"辽河流域水环境质量演变及其驱动力研究(2008ZX07208-001)
关键词
南沙河
沉积物
重金属
地累积指数
潜在生态危害指数
Nansha River
Sediment
Heavy metal
Index of geo-accumulation
Potential ecological risk index
