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http://dx.doi.org/10.11001/jksww.2016.30.5.501

Simultaneous treatment of Cr(VI) and EDCs using flat type photocatalytic reactor under solar irradiation  

Kim, Saewon (Korea Institute of Energy Research, New & Renewable Energy Division, Hydrogen Laboratory)
Cho, Hyekyung (Korea Institute of Energy Research, New & Renewable Energy Division, Hydrogen Laboratory)
Joo, Hyunku (Korea Institute of Energy Research, New & Renewable Energy Division, Hydrogen Laboratory)
Her, Namguk (Korea Army Academy at Young-Choen, Department of Chemistry and Environmental Science)
Yi, Kwangbok (Chungnam National University, Graduate School of Energy Science and Technology)
Kim, Jong Oh (Hanyang University, Department of Civil and Environmental Engineering)
Yoon, Jaekyung (Korea Institute of Energy Research, New & Renewable Energy Division, Hydrogen Laboratory)
Publication Information
Journal of Korean Society of Water and Wastewater / v.30, no.5, 2016 , pp. 501-509 More about this Journal
Abstract
In this study, a flat-type photocatalytic reactor is applied under solar irradiation for simultaneous treatment of target pollutants: reduction of Cr(VI) to Cr(III) and oxidation of EDCs (BPA, EE2, E2). An immobilized type of photocatalyst was fabricated to have self-grown nanotubes on its surface in order to overcome limitations of powdery photocatalyst. Moreover, Ti mesh form was chosen as substrate and modified to have both larger surface area and photocatalyst content. Ti mesh was anodized at 50V and $25^{\circ}C$ for 30min in the mixed electrolytes ($NH_4F-H_2O-C_2H_6O_2$) and annealed at $450^{\circ}C$ for 2 hours in ambient oxygen to have anatase structure. Surface characterization was done with SEM and XRD methodologies. Fabricated NTT was applied to water treatment, and coexisting Cr(VI) and organics (EDCs) enhanced each other's reactions by scavenging holes and electrons and thus impeding recombination. Also, several experiments were conducted outdoor under direct sunlight and it was observed that both solar-tracking and applying modified photocatalyst were proven to enhance reaction efficiency.
Keywords
Cr(VI); Endocrine-disrupting compounds (EDCs); Flat-type photoreactor; Nanotubular $TiO_2$ (NTT); Solar irradiation;
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Times Cited By KSCI : 1  (Citation Analysis)
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