摘要
通过实地调查分析了青城子铅锌矿尾矿废弃地的优势植物对Cu、Cd、Pb和Zn的吸收、转运和富集特征。结果表明,烟管头草(Carpesium cernum)对Cd、地榆(Sanguisorba officinalis)对Cd和Cu、苦荬菜(Ixeris clenticulata)对Cd、Zn地上部富集系数和转移系数均大于1.0,兴安毛连菜(Picris davurica)、万寿菊(Tagetes erecta)、白花败酱(Palrinia villosa)的地上部Pb含量都超过1000mg·kg-1,达到Pb超富集植物临界含量标准。同时,这些植物对重金属污染有很强的耐性能力,对污染土壤治理和植被重建具有一定的实践意义。
A field survey on soils and plants growing in the tailing dumps in the Qingchengzi lead-zinc mining area was carried out. The concentrations of Cd, Cu, Pb and Zn in roots and shoots of weed species were measured. The results showed that the bioaccumulation coefficient and translocation factor of Cd in Carpesium ce,rnum, Cd, Cu in Sanguisorba offieinalis and Cd, Zn io lxeris clentieulata were greater than 1.0, respectively. The contents of Pb in Picris davurica, Tagetes erecta and Palrinia villosa were higher than 1 000 mg·kg^-1, all of them exceeded the threshold value as a Pb-hyperaeeumulator. Furthermore, those plants had strong tolerance to heavy metal contamination, which indicated that they could be useful for harnessing and rehabilitating contaminated soils by heavy metals in the future.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2008年第6期2166-2171,共6页
Journal of Agro-Environment Science
基金
国家高技术研究发展计划(863)项目(2006AA06Z386)
中俄自然资源与生态环境联合研究中心资助
关键词
尾矿废弃地
超富集植物
重金属污染
植物修复
tailing dump
hyperaccumulator
heavy metal contamination
phytoremediation
