河道底泥重金属的含量特征与潜在生态风险  

Content Characteristics and Potential Ecological Risks of Heavy Metals in River Sediment

作　　者：王磊[1] 向甲甲 殷瑶[1] 段妮娜[1] 徐伟[1] WANG Lei;XIANG Jiajia;YIN Yao;DUAN Nina;XU Wei(Shanghai Municipal Engineering Design Institute〈Group〉Co.,Ltd.,Shanghai 200092,China)

机构地区：[1]上海市政工程设计研究总院〈集团〉有限公司,上海200092

出　　处：《净水技术》2020年第10期162-167,172,共7页Water Purification Technology

基　　金：上海市国际科技合作基金项目(17210731100);上海市科技人才计划项目(19QB1405300);上海建工集团研究开发类课题(18YJKF-18)。

摘　　要：对上海某区100条河流共采集271个底泥样品进行检测分析。底泥中8种重金属的含量由高到低依次为:Zn>Cr>Ni>Pb>Cu>As>Cd>Hg,分析表明,多数重金属的来源具有一定相似性。潜在生态风险评价结果表明,各种重金属的潜在生态风险从高到低依次为:Hg>Cd>As>Ni>Pb>Cu>Cr>Zn,Hg和Cd的含量虽然较低,但其潜在生态风险却最高,两者对潜在生态风险指数的平均贡献分别达到46.99%和30.31%,属于中等到强生态风险,其余重金属均属于低生态风险。A total of 271 sediment samples were collected from 100 rivers in a district of Shanghai for detection and analysis.The order of 8 heavy metals ranked by contents from high to low was:Zn>Cr>Ni>Pb>Cu>As>Cd>Hg.Potential ecological risk assessment results showed that the order of heavy metals ranked by potential ecological risk from high to low was:Cd>Hg>As>Ni>Pb>Cu>Cr>Zn,although the contents of Hg and Cd were low,but their potential ecological risks were high,and their average contributions to potential ecological risk index were 46.99%and 30.31%,respectively,belonging to moderate to strong ecological risk,while the other heavy metals only had low ecological risks.

关 键 词：河道 底泥 重金属 生态风险 上海市 

分 类 号：X522[环境科学与工程—环境工程]