Title: Cu and Cd Extraction from Contaminated Soils by Organic Ligands
Abstract: Chelation-induced phytoremediation technology which can enhance plants to absorb heavy metals is paid more attention.It is significant to apply this technique on remediation of heavy metals in contaminated soil.Four soils from the mining area of Daye, Hubei province were collected to investigate the extraction effect of three organic ligands (citric acid, tartaric acid and EDTA) on copper and cadmium from these soils, based on the conditions of different concentrations, extraction time and electrolyte addition.The results showed that the extraction amount of copper and cadmium related to the types and concentrations of the organic ligands and increased with the increasing concentration of the organic ligands.The extraction reached equilibrium for Cu in 30 min and for Cd in 1 hour.The addition of electrolyte to the citric acid treatment in the soils could decrease the amounts of extracted Cu and Cd.
Publication Year: 2008
Publication Date: 2008-01-01
Language: en
Type: article
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