Evaluation of the cadmium and lead phytoextraction by castor bean (Ricinus communis L.) in hydroponics

3rd International Conference on Advances in Energy, Environment and Chemical Engineering

能源学;生态环境科学;化学工业

Niu, Z.X.^1,2 ; Sun, L.N.^1,2

Key Laboratory of Regional Environment and Eco-remediation, Liaoning Province, Shenyang, China^1

Shenyang University, Environmental Department, Liaoning Province, Shenyang, China^2

关键词: Bioconcentration factor;    Cadmium and leads;    Hydroponic culture;    Innovative method;    Pb concentration;    Phytoremediation;    Positive correlations;    Ricinus communis;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/69/1/012063/pdf
DOI  :  10.1088/1755-1315/69/1/012063

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Phytoextraction has been considered as an innovative method to remove toxic metals from soil; higher biomass plants such as castor bean (Ricinus communis L.) have already been considered as a hyperaccumulating candidate. In the present study, castor bean was used to accumulate the cadmium and lead in hydroponic culture, and the root exudates and biomass changes were analyzed. Results demonstrated that ratios of aerial biomass/ root biomass (AW/RW) in treatments declined with concentrations of Cd or Pb. Optical density (OD) at 190 nm and 280 nm of root exudates observed in Cd and Pb treatments were lower than the control. In single Cd or Pb treatments, bioconcentration factors (BCF) of Cd or Pb increased with time and decreased with concentrations, the highest BCFs appeared in Cd5 (14.36) and Pb50 (6.48), respectively. Cd-BCF or Pb-BCF showed positive correlations with AW/RW ratios and OD values, and they were negative correlated with Cd and Pb concentration. Results in this study may supply useful information for phytoremediation of soil contaminated with cadmium and lead in situ.