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Environmental Engineering Research 2012;17(S1): S15-S19. DOI: https://doi.org/10.4491/eer.2012.17.S1.S15
Removal of Arsenic from Aqueous Solution Using Hybrid Metal Oxide
Youn-Jong Park1, Jae-Kyu Yang2, Hee-Jeong Choi3, and Seung-Mok Lee3
1Business Development Team, SK E&C Co., Ltd., Seoul 100-130, Korea
2Division of General Education, Kwangwoon University, Seoul 139-701, Korea
3Department of Environmental Engineering, Kwandong University, Gangneung 210-701, Korea
Corresponding Author: Seung-Mok Lee ,Tel: 82-33-649-7535, Fax: 82-33-642-7635, Email: leesm@kd.ac.kr
Received: September 10, 2012;  Accepted: September 29, 2012.
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Hybrid reaction media prepared with aluminum oxide recycled from industrial wastes and titanium dioxide was used in the treatment of synthetic wastewater containing arsenic, where photocatalytic oxidation of As(III) and/or adsorption of As(V) was applied for treatment of the effluent. Although both synthesized aluminum oxide (SAO) and hybrid metal oxide (HMO) showed lower adsorption efficiency of As(III) than As(V) in the entire pH range, the results of HMO adsorption indicated a possibility of As(III) removal at acidic pH conditions. Under a wavelength of 365–375 nm with using ultraviolet light emitting diode it was observed that HMO effectively oxidized As(III) to As(V) and adsorbed sufficiently both As(III) and As(V). Oxidation of As(III) was pH dependent and the percentage of As(III) oxidation was enhanced under more acidic conditions. The results obtained demonstrated that prepared hybrid media can be effectively used for inorganic arsenic removal from groundwater.
Keywords: Aluminum oxide | Arsenic | Hybrid metal oxide | Photocatalyst | Titanium dioxide
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