Abstract
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<TEX>$_2$</TEX> and TiO<TEX>$_2$</TEX>/polymer was used to be oxidized NH<TEX>$_4$</TEX>-N in wastewater to NO<TEX>$_3$</TEX>-N. Existing the anion as Cl<TEX>$\^$</TEX>-/, 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<TEX>$\^$</TEX>-/ and OCl<TEX>$\^$</TEX>-/. Some of the added ion might have blocked the active sites of the catalyst surface, thus deactivated the catalyst.
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