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A Study on Adsorption and Desorption of As(III) and As(V) on Soil using a Column  

Kim, Myoung-Jin (Division of Civil and Environmental Engineering, Korea Maritime University)
Kim, Tae-Suk (Division of Civil and Environmental Engineering, Korea Maritime University)
Publication Information
Journal of Soil and Groundwater Environment / v.13, no.1, 2008 , pp. 52-59 More about this Journal
Abstract
Adsorption is a major process causing the accumulation of arsenic onto soil. Therefore, further understanding of the adsorption/desorption characteristics of arsenic species on soil is essential for predicting their fate and preparing appropriate remediation strategy to remove arsenic from soil. In this study, the column adsorption/desorption experiment has been performed with As(III) and As(V) on soil. Experiment with As(III) was conducted under reducing condition, whereas that with As(V) was under oxidizing condition. Most of As(III) was remained on the oxidation state during the experiment. The results showed that the adsorption/desorption rate of As(III) was higher than that of As(V). Adsorption and desorption of arsenic species were not completely reversible in the column experiment. It was also found that As(V) in the column experiment was adsorbed more rapidly on soil than in the batch experiment.
Keywords
Arsenic species; Adsorption; Desorption; Soil; Column;
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