开阳磷矿10种木本植物叶片重金属富集特征

植物对重金属具有一定的吸附能力,植物修复是生态修复不可或缺的一部分,利用植物减缓和治理重金属污染具有重要意义.选取开阳磷矿马路坪矿区生命周期较长的木本植物及其土壤作为研究对象,探究木本植物受Cu、Zn、Pb、Cd、As等5种重金属污染土壤的效应,对植物重金属含量及其富集特性进行研究分析,筛选出累积重金属的植物,作为矿区...

Enrichment characteristics of heavy metals in leaves and soil of 10 woody plants in Kaiyang phosphate mine

Plants can absorb heavy metals,phytoremediation is an indispensable part of ecological remediation,it is important to use plants to mitigate and control heavy metal pollution.To bridge the gap,the contents of copper(Cu),zinc(Zn),lead(Pb),cadmium(Cd),and arsenic(As)in soils and woody plants surrounding Maluping Base,Kaiyang Phosphorous Mining Corporation(Guiyang,China)were investigated.Then,phytoaccumulators were selected for providing reference for the phytoremediation of metal-contaminated soils.Our results suggest that based on determination of heavy metals in plant leaves arranged in descending order are Zn,Cu,Pb,Cd,As,and indicate a single source for them since their concentrations in either soils or plants are closely correlated.Besides,high contents of Zn for Pinus massoniana,Catalpa bungei,Platanus acerifolia(Aiton)Willdenow,and Cunninghamia lanceolata,large concentrations of Cu in Platanus acerifolia(Aiton)Willdenow,and Catalpa bungei,Pb accumulation within Cunninghamia lanceolate,Pinus massoniana,and Juglans mandshurica were measured.Additionally,it is shown that plants amassing Cd include Pinus massoniana and Robinia pseudoacacia L.,and Rhus Chinensis,and that Robinia pseudoacacia L.and Platanus acerifolia(Aiton)Willdenow readily takes up As.Therefore,the aforementioned plants can be regarded as the accumulators of their corresponding contaminants in soils.