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http://dx.doi.org/10.1021/jp0267149

has been cited by the following article:

• TITLE: Kinetic and Thermodynamic Study for Fenton-Like Oxidation of Amaranth Red Dye

  AUTHORS: Z. M. Abou-Gamra

  KEYWORDS: Amaranth Red, Decolorization, Kinetics, Fenton-Like

  JOURNAL NAME: Advances in Chemical Engineering and Science, Vol.4 No.3, July 4, 2014

  ABSTRACT: Oxidation by Fenton like reactions (Fe3+/H2O2) is economically process for destructive hazardous pollutants in waste water. The effects of different parameters such as, amaranth red dye, ferric chloride, hydrogen peroxide concentrations, pH value of solution, temperature and the presence of inorganic ions (carbonate, nitrate, chloride) on oxidative decolorization of amaranth were investigated. Amaranth degradation by (Fe3+/H2O2) reagent was found to follow first order kinetic model. Under optimum condition, pH = 2.6 and [FeCl3] = 3.75 × 10-4 mol·dm-3, the amaranth in aqueous solution with an initial concentration of 5 × 10-5 mol·dm-3 was degraded by 95% within 6 minutes. Increasing temperature in the range of 298 - 308 K increases the rate of dye degradation. Thermodynamic constants, ΔH*, ΔS* and ΔG* were evaluated. The results implied that the oxidation process was favorable and endothermic.