Oxygen Production from Halate Aqueous Solutions by UV Photoinduced Oxidation

Oxygen generation from halate solution under ultraviolet irradiation was studied. The results show that with regard to KBrO3, KIO3, and KClO3 solution containing 9mmol of halate ions, and the average rates of oxygen formation were 14.1, 10.2 and 2.5 mmol, respectively in the first 3 hours. The rates and amount of oxygen formation increased with increasing halate concentration. The oxygen evolved from the oxidation of water by the excited radical (XO3 ) formed from UV absorption of XO3− ions, resulting in the reduction of halate ions to halide ions

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