黄河花园口表层沉积物重金属污染及潜在生态风险评价  

Heavy Metal Pollution and Potential Ecological Risk Assessment of Huayuankou Surface Sediments in Yellow River

作　　者：马志华[1] 郭巧玲[1] 韩瑶瑶 MA Zhihua;GUO Qiaoling;HAN Yaoyao(Institute of Resource ＆ Environment,Henan Polytechnic University,Jiaozuo 454003,China)

机构地区：[1]河南理工大学资源与环境学院,河南焦作454003

出　　处：《人民珠江》2018年第9期6-9,共4页Pearl River

基　　金：国家级大学生创新创业训练计划项目(201310460002);国家自然科学基金青年项目(41201020)

摘　　要：研究黄河花园口表层沉积物重金属污染可为黄河中游重金属污染治理和生态风险管理提供参考。在黄河花园口河段布设8个采样点,取表层沉积物样品对其重金属(Pb、Cu、Cd、Zn)含量进行检测分析,采用地累积指数法和潜在生态危害指数法分别评价其污染水平。结果表明:沉积物中重金属(Pb、Cu、Cd、Zn)的含量分别为:22.10、20.07、0.198、125.28 mg/kg。地累积指数法评价结果显示,重金属元素污染程度顺序为:Cd>Zn>Pb>Cu。潜在生态风险指数法评价结果表明,各重金属污染对花园口河段构成的潜在生态危害由强至弱依次为:Cd>Cu>Pb>Zn,其中Cd是最大贡献因子。总体上讲,黄河花园口河段处于轻微生态风险等级,未受到明显的重金属污染。The study of heavy metal pollution of Huayuankou surface sediments in Yellow River can provide references for the heavy metal pollution treatment and ecological risk management in the middle reaches of Yellow River.8 sampling points were set up in the huayuankou section, and the contents of heavy metals （Pb, Cu, Cd and Zn） were detected and analyzed by surface sediment samples.This paper used the geo-accumulation index and the potential ecological risk index to evaluate the pollutionlevel.The results indicated that the average contents of heavy metals（Pb, Cu, Cd and Zn） in Huayuankou were 22.10 mg/kg,20.07 mg/kg,0.198 mg/kg, 125.28 mg/kg,respectively.The assessment results by geo-accumulation index indicated that the pollution degree of heavy metal elements was Cd〉Zn〉Pb〉Cu. The assessment results by potential ecological risk index showed that the potential ecological risk intensity caused by heavy metals was Cd〉Cu〉Pb〉Zn, and Cd was the predominant element among them. In general, it was not significantly polluted by heavy metals.

关 键 词：沉积物 重金属 地累积指数 潜在生态危害指数 花园口 

分 类 号：X522[环境科学与工程—环境工程]