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Extraction of Cd and Pb from Soil by Anionic Surfactant and Ligand NaI  

Heo, Jung-Hyun (Department of Environmental Engineering, Kunsan National University)
Jeong, Seung-Woo (Department of Environmental Engineering, Kunsan National University)
Publication Information
Journal of Soil and Groundwater Environment / v.13, no.5, 2008 , pp. 74-80 More about this Journal
Abstract
Heavy metals, Cd and Pb, in soil were extracted by using anionic surfactants such as AOS (alpha olefin sulfonate), SDS (sodium dodecyl sulfate), and LAS (linear alkyl benzene sulfonic acid). Metal extractability from soil was affected by the carbon number and solution pH of surfactants. LAS showed higher metal extractability due to the acidic solution condition. Although SDS has a fewer carbon number than AOS, it would produce smaller micelles and resulted in more efficient extraction of metals by increased soil contact. Cd extractability of surfactant was twice enhanced by adding NaI as a ligand. However, Pb extractability of surfactant was sometimes reduced by adding NaI. Those ligand effects were dependent on solubility of metal-ligand. The column experiment also showed that SDS having smaller micelles resulted in higher metal extractability than AOS.
Keywords
Anionic surfactant; Heavy metal; Ligand; Soil;
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Times Cited By KSCI : 3  (Citation Analysis)
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