青葙吸收富集土壤重金属Cd、Zn、Cu、As和Pb的特性研究

Characteristics of Scirpus triqueter absorbing and accumulating heavy metals of Cd,Zn,Cu,As,and Pb in contaminated soil

为探究青葙(Scirpus triqueter)修复重金属污染土壤的性能,通过对安徽铜陵某矿山流域内农田自然生长的青葙和土壤取样并检测其根、茎和花中镉(Cd)、铜(Cu)、砷(As)锌(Zn)和铅(Pb)的含量,结合相关文献分析了青葙富集和转运重金属Cd、Cu、As、Zn和Pb的特性。结果表明:青葙不同部位和重金属平均含量表现出Zn>Cu>As>Pb>Cd和花>根>茎的规律,各部位富集系数(BCF)和转运系数(TF)分别介于0.03~18.10、0.84~1.63之间,青葙对Cd有极强的富集能力;对Zn富集能力相对较好,除花对Cu有一定的富集能力外,青葙整体对Cu、As和Pb的富集能力较差。青葙花部对Cu和Zn的表现出较高的转运能力,茎部对Cu、Cd和Pb的转运能力较强。

In order to investigate the capability of Scirpus triqueter in remediating heavy metal contaminated soil,samples of Scirpus triqueter and soil were collected from farmland within a mining area in Tongling,Anhui Province,China.The concentrations of cadmium(Cd),copper(Cu),arsenic(As),zinc(Zn),and lead(Pb) in the roots,stems,and flowers were measured.Combined with relevant literature,the enrichment and translocation characteristics of Cd,Cu,As,Zn,and Pb by Scirpus triqueter were analyzed.The results showed that the average contents of heavy metals in different parts of Scirpus triqueter followed the order of Zn > Cu > As > Pb > Cd,and the order of flower > root > stem.The BCF and TF of each part ranged from 0.03 to 18.10 and from 0.84 to 1.63,respectively.Scirpus triqueter exhibited extremely strong enrichment capability for Cd and relatively good enrichment capability for Zn.However,it showed relatively poor enrichment capability for Cu,As,and Pb overall,except for a certain enrichment capability for Cu in the flowers.The flower of Scirpus triqueter demonstrated high translocation ability for Cu and Zn,while the stem showed strong translocation ability for Cu,Cd,and Pb.