【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。更多还原

【Abstract】 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: Zn>As>Pb>Cu>Cr>Cd.Potential ecological risk of heavy metals in sediment exhibits light to middle,with Cd as priority risk.更多还原