Article ID Journal Published Year Pages File Type
628864 Desalination 2006 6 Pages PDF
Abstract

Electrokinetic extraction was tested to remove lead from an Algerian contaminated soil ([Pb] = 4432 ± 275 μg·g−1) located near a battery plant. The enhancement of pollutant removal was achieved by introducing a chelating reagent (disodium salt of ethylendiaminetetraacetic acid, EDTA 0.1 M) in the catholyte. In order to avoid ligand loss, the cell was also modified by adding extra compartments and inserting cation-exchange membranes. Results of contaminant distribution across the soil column showed efficient transport of lead toward the anode, despite a large amount of calcite (25%) and a high acid/base buffer capacity of the sample. Simultaneous recovery of EDTA and lead from their chelated solutions was made possible using the same set-up and by monitoring pH in the circulating fluids.

Related Topics
Physical Sciences and Engineering Chemical Engineering Filtration and Separation