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KMID : 1024520030120101071
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Journal of the Environmental Sciences
2003 Volume.12 No. 10 p.1071 ~ p.1077
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Photocatalytic oxidation reaction in removal of NH₄-N by using TiO₂
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Park Sang-Won
Kim Jung-Bae
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Abstract
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The aim of this study is, firstly, to find out what kinds of inorganic species are produced in the photocatalytic oxidation of ammonium-nitrogen containing water and, secondly, to seek the influence of anion for the photocatalytic oxidation of ammonium contained compounds. The photoenergy above 3 eV(λ <415 nm) was effectively absorbed by TiO and TiO/polymer was used to be oxidized NH-N in wastewater to NO-N. Existing the anion as Cl-/, the rate of photocatalytic oxidation decreased regardless of other condition. This result showed that the chloride ions reduced the rate of oxidation by scavenging oxidizing radical species as OH-/ and OCl-/. Some of the added ion might have blocked the active sites of the catalyst surface, thus deactivated the catalyst.
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KEYWORD
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Photocatalytic oxidation, TiO₂, Photoenergy
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