某铅锌矿坑口周围具有重金属超积累特征植物的研究  

Hyperaccumulative characteristics of some weeds distributed round a Pb-Zn mining site

作　　者：魏树和[1] 周启星[1] 王新[1] 曹伟[1] 

机构地区：[1]中国科学院沈阳应用生态研究所陆地生态过程重点实验室

出　　处：《环境污染治理技术与设备》2004年第3期33-39,共7页Techniques and Equipment for Environmental Pollution Control

基　　金：国家杰出青年科学基金(20225722);中国科学院知识创新重要方向项目(KZCX2-SW-416)

摘　　要：针对目前植物修复中Cd-Pb-Cu-Zn复合污染的超富集植物缺乏研究,采用野外采样系统分析方法,对青城子铅锌矿各主要坑口周围17科31种杂草植物进行其积累特性的初步研究。结果表明,全叶马兰(Kalimeris integrifolia)、蒲公英(Taraxacum mongolicum)和鬼针草(Bidens bipinnata)3种植物地上部对Cd的富集系数均>1,且地上部Cd含量大于根部Cd含量,具备了重金属超富集植物的基本特征,进一步研究的价值很大。以杂草为对象筛选超富集植物很可能获得较大突破。Accumulative characteristics of heavy metals ( Cd, Pb, Cu and Zn) in 31 weed species belonging to 17 families which survived in a Pb.Zn mining site were systematically examined. The results showed that the bioaccu-mulation coefficient in the above-ground of Kalimeris integrifolia , Taraxacum mongolicum, and Bidens bipinnata was > 1 respectively, and the concentration of Cd in above-ground was all higher than that in roots, which possessed basic characteristics of hyperaccumulators. Thus it is possible to screen out hyperaccumulators from weed species.

关 键 词：植物修复 超富集作用 全叶马兰 蒲公英 鬼针草 富集系数 土壤污染 重金属 污染治理 铅锌矿 

分 类 号：X753[环境科学与工程—环境工程]