摘要
对某省两个有色冶炼污染区进行了土壤和植物采样,并对6个样点土壤和11种植物中的As、Pb、Cd、Zn等重金属含量做了测定分析。结果表明:①该区域土壤已经受到不同程度的重金属污染,其中以As和Cd污染最为严重;②从植物地上部重金属富集系数和体内含量来看,钻形紫苑具备了As-Pb-Cd超积累植物的基本特征,进一步研究的价值很大,白苞蒿地上部As、Pb、Cd及小白酒草地上部Cd富集系数均大于1,也具备了超积累植物的基本特征;③大部分植物富集As、Pb、Cd、Zn均呈现地上部高于地下部的富集规律,是通过根系吸收转移还是叶片吸收还有待实验室内人工栽培确定。
In this paper, soils and native plants around two sites contaminated by smelting were investigated. The contents of heavy metals（As, Pb, Cd and Zn） in 6 soil samples and 11 plant samples were measured. The results indicate; （1）the soils were severely contaminated with four heavy metals, especially As and Cd;（2） according to the bioaccumulation factors and contents in the above-ground of plants, Aster subulatus Michx showed hyperaccumulative characteristics for As, Pb and Cd. The bioaccumulation factors in the above-ground of Arternisia lactiflora wall for As-Pb-Cd and Conyza Canadensia （L.） cronq for Cd were〉 1 respectively and possessed basic characteristics of hyperaccumulators, too; （3） most plants showed the higher contents of four heavy metals in the above-ground than in the below-ground, due to root absorption and transfer or leafage absorption, which needs to be determined by manual cultivation in laboratory.
出处
《安全与环境工程》
CAS
2006年第1期48-51,共4页
Safety and Environmental Engineering
基金
云南省教育厅自然科学基金项目(04Y4720)资助
