This study involves the synthesis of a ferric compound called heteropolyanion of Dawson type (α 2P2W17FeO61)7−, which it is aimed to apply as a catalyst in an advanced oxidation process, in the presence of H2O2 to remove an organic pollutant, methyl blue (MB) located in the wastewater of textile industries. The study of the kinetics of the oxidation reaction was followed in aqueous solution in the presence of heteropolyanion (α 2P2W17FeO61)7−. To improve the kinetics of degradation of MB, different parameters controlling this reaction were varied. Among these parameters were the pH of the initial aqueous solution, the mass of the catalyst, the concentration of the oxidant (H2O2), the concentration of the dye, and temperature. The optimal conditions for a maximum rate conversion (100 %) are: pH 3, mass of the catalyst = 0.1 g, [H2O2]o = 0.4 mM, [M.B]o = 6 ppm, and temperature = 35 °C. The effects of salts present (chlorides and sulfates) in solution of dye was studied. The effects of the nature of the catalyst such as (α 2P2W18O62)6−; (α 2P2W17O61)10−; (α 2P2W17CoO61)8−; and (α 2P2W15Mo2FeO61)7− on the dye oxidation at room temperature were evaluated.
Research on Chemical Intermediates – Springer Journals
Published: Jun 25, 2013
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