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2004 | 2 | 4 | 573-588
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Advanced oxidation processes for decolorization of aqueous solution containing acid red G azo dye

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Some investigations concerning the decolorization of Acid Red G azo dye by photooxidation with hydrogen peroxide were performed. The influences of pH, oxidant concentration, and the presence of Fe2+ or other metal ions (Co2+, Cu2+, Ni2+, Mn2+) as potential catalysts, were investigated. The best results were obtained in the presence of ferrous ions in acid and neutral media. The other ions are not as effective as Fe2+ for dye decolorization. Co2+ and Cu2+ ions have a catalytic action, at low concentration, within a wide range of pH. Ni2+ and Mn2+ ions have no catalytic effect in photooxidation with hydrogen peroxide at acid Ni2+ and Mn2+ ions have no catalytic effect in photooxidation with hydrogen peroxide at acid pH values, but show a weak action in alkaline media.

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  • Department Of Environmental Engineering, Faculty Of Industrial Chemistry of Technical University Of Iaşi, Bvd. D. Mangeron No. 71A, 700050, Iassy, Romania,
  • Department Of Environmental Engineering, Faculty Of Industrial Chemistry of Technical University Of Iaşi, Bvd. D. Mangeron No. 71A, 700050, Iassy, Romania,
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