摘要
对长江万州段沉积物进行采集,用原子吸收光谱法测定了沉积物中的Pb、Cu、Cr、Cd、Zn等重金属的含量,用单因子指数法和Hakanson生态风险指数法评价了沉积物中重金属综合污染效应。结果表明:长江万州段主要的重金属污染因子为Cd,生态风险影响因子顺序为:Cd>Zn>Pb>Cu>Cr。潜在生态风险因子大小顺序为:Cd>Pb>Cu>Zn>Cr,潜在生态风险指数RI平均值为152.35,长江万州段大部分断面处于中等潜在生态风险。
Through analyzing contents of typical pollutants, i.e. Pb, Cu, Cr,Cd and Zn in sediments from the Wanzhou section of the Yangtze River, the quality status of these sediments was evaluated with the index number techniques of single factor and Hakanson ecological risk. It is revealed that the main pollution factor is Cd. The sequence of ecological risk is Cd 〉 Zn 〉 Pb 〉 Cu 〉 Cr, and the potential ecological risk is Cd 〉 Pb 〉 Cu 〉 Zn 〉 Cr. The average of potential ecological risk is 152.35, and it is concluded that the Wanzhou section of the Yangtze River has middle potential ecological risk.
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2007年第2期236-239,共4页
Resources and Environment in the Yangtze Basin
基金
教育部春晖计划及重庆市教育委员会基金(KJ051108)资助
关键词
沉积物
重金属
潜在生态风险
sediment
heavy metal
ecological risk assessment
