南京大学学报(自然科学版) ›› 2016, Vol. 52 ›› Issue (6): 1040–.

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蟹塘底泥中重金属的生态风险评估及其植物修复

臧晓梅1,缪爱军1*,郑 浩2,樊祥科2,樊宝洪2,杨柳燕1   

  • 出版日期:2016-11-21 发布日期:2016-11-21
  • 作者简介:1.污染控制与资源化研究国家重点实验室,南京大学环境学院,南京,210023; 2.江苏省渔业技术推广中心,南京,210036
  • 基金资助:
    收稿日期:2016-08-08 *通讯联系人,E-mail:miaoaj@nju.edu.cn

Ecological risk assessment of heavy metals in the sediment of crab pond and its phytoremediation

Zang Xiaomei1,Miao Aijun1*,Zheng Hao2,Fan Xiangke2,Fan Baohong2,Yang Liuyan1   

  • Online:2016-11-21 Published:2016-11-21
  • About author:1.State Key Laboratory of Pollution Control and Resource Reuse,School of Environment, Nanjing University,Nanjing,210023,China; 2.Fisheries Technology Extension Center of Jiangsu Province,Nanjing,210036,China

摘要: 水体底泥污染是一个世界性环境问题.为了研究养殖水体底泥中重金属的生态风险以及植物修复,通过测定养蟹塘底泥中Cr、Cu、Zn、As、Cd、Pb的含量,用Hakanson提出的潜在生态危害指数法对养殖水体底泥中重金属的潜在生态风险进行了评价;同时对养殖螃蟹体内的重金属含量进行对比分析.另外,通过冬麦草对底泥中的重金属进行植物修复,研究冬麦草富集重金属的能力.研究发现养殖塘底泥中Cd的生态风险最高,其它重金属均显示具有轻微的生态风险.底泥中6种重金属总的潜在生态风险按照不同的参照标准显示为轻微或中等程度.螃蟹体内的Cr、As含量较高,且冬麦草对底泥中Cr、As的去除效果最好.

Abstract: Sediment pollution is a worldwide environmental problem.In order to study the ecological risk of heavy metals in the sediment of aquaculture water and its phytoremediation,we measured the content of Cr,Cu,Zn,As,Cd,and Pb in the sediment,and assessed the potential ecological risk of heavy metals in the sediment using the Hakanson’s method of potential ecological risk factors.We also studied the accumulative ability of winter wheat.Our study shows that Cd has the highest ecological risk in the sediment,while the potential ecological risk of other heavy metals is low.The overall potential ecological risk of these six heavy metals used in present study,as compared to various kinds of reference materials,is slight or moderate.In addition,the content of Cr and As in crab found high,and could be removed by winter wheat effectively.

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