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As (v) immobilization in an aqueous solution by zerovalent iron under various environmental conditions
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 Title & Authors
As (v) immobilization in an aqueous solution by zerovalent iron under various environmental conditions
Yoo, Kyung-Yoal; Ok, Yong-Sik; Yang, Jae-E.;
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 Abstract
Zerovalent iron (ZVI) has been widely used in the removal of environmental contaminants from water. The objective of this research was to assess the efficiency of ZVI for immobilization of As (V) in the contaminated water under various chemical conditions. Batch-type experiments showed that the immobilization process followed a first-order kinetic model. Rate constant (k) of the reaction increased consistently and proportionally as increasing ZVI concentrations from 1% (0.158 ) to 3% (0.342 ), and temperatures from (0.117 ) to (0.246 ), respectively. Whereas the rate constant decreased as increasing As (V) concentrations from 1 mg (0.284 ) to 3 mg (0.153 ), and the initial pH from 3 (0.393 ) to 9 (0.067 ), respectively. Results demonstrated that As (V) in an aqueous solution was rapidly immobilized by ZVI treatments. Zerovalent iron was fast method for remediation of As (V) contaminated water.
 Keywords
As (V);zerovalent iron;Eh;first-order kinetic model;immobilization;pH;
 Language
Korean
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