| Removal Efficiency of Arsenic by Adsorbents having
Different Type of Metal Oxides |
| Sang-Yoon Min1, Byeong-Kwon Kim1, Sun-Ju Park1, Yoon-Young Chang1, and Jae Kyu Yang2† |
1Department of Environmental Engineering, Kwangwoon University, Seoul 139-701, Korea
2Division of General Education, Kwangwoon University, Seoul 139-701, Korea |
Corresponding Author:
Jae Kyu Yang ,Tel: +82-2-940-5769, Fax: +82-2-917-5769, Email: jkyang@kw.ac.kr
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Received: March 12, 2009; Accepted: June 1, 2009. |
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| ABSTRACT |
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In this study, oxidation of As (III) as well as removal of total arsenic by adsorbents coated with single oxides or multi-oxides (Fe (III), Mn (IV),
Al (III)) was investigated. In addition, multi-functional properties of adsorbents coated with multi-oxides were evaluated. Finally, application of
activated carbon impregnated with Fe or Mn-oxides on the treatment of As (III) or As (V) was studied. As (V) adsorption results with adsorbents
containing Fe and Al shows that adsorbents containing Fe show a greater removal of As (V) at pH 4 than at pH 7. In contrast adsorbents containing
Al shows a favorable removal of As (V) at pH 7 than at pH 4. In case of iron sand, it has a negligible adsorption capacity for As (V) although it
contains 217.9 g-Fe/kg-adsorbent. Oxidation result shows that manganese coated sand (MCS) has the greatest As (III) oxidation capacity among all
metal oxides at pH 4. Oxidation efficiency of As (III) by IMCS (iron and manganese coated sand) was less than that by MCS. However the total
removed amount of arsenic by IMCS was greater than that by MCS. |
| Keywords:
Arsenic | Adsorption | Metal-oxide | Oxidation |
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