期刊
INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
卷 20, 期 3, 页码 237-248出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/15226514.2017.1374333
关键词
rhizosphere; contamination; heavy metals; metal speciation; metal accumulators
资金
- CV Raman Fellowship for African Researchers
Activities at root-soil interface determine the solubility and uptake of metals by plants. Metal accumulation in plant species (Imperata cylindrical, Cynodon dactylon, Eleucine indica, Gomphrena celosoides, Sporobolus pyramidalis, Chromolaena odorata and Rhynchospora corymbosa) growing on Pb contaminated site as influenced by variations in physico-chemical characteristics, dissolved organic matter (DOM), Pb fractionation and different functional groups (using Fourier Transmittance Infra-red) of rhizospheric and non-rhizospheric soils was assessed. The electrical conductivity (2660-5520 mu s) and Pb concentrations (51390.0-64080.0mg/kg) were more in non-rhizospheric than rhizospheric soils having 276 mu s to 3160 mu s EC and 3289.0 to 44850.0mg/kg Pb. More nutrients, DOM and carbohydrates functional groups (C-O; 1100 -1000 and O-H; 3700-3600) were found in rhizospheric compared to non-rhizospheric soils. The pH was slightly acidic (5.0-5.54) and E. indica with the lowest pH (5.0) accumulated highest Pb concentrations in shoot (8030mg/kg) and root (16380mg/kg) while C. odorata with highest values of pH, P, Ca and Mg in rhizospheric soil accumulated the least (root; 331.6 and shoot: 209.0mg/kg). Pb was more in organic and residual fractions of rhizospheric and non-rhizospheric soils respectively. Reduction in pH, EC coupled with nutrients and DOM availability increased Pb uptake by plants.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据