Evaluation of the photo-Fenton process on discoloration of a commercial textile dye

Andressa Antunes Bortoti, Mauricio Ferreira da Rosa, Reinaldo Aparecido Bariccatti, Viviane da Silva Lobo

Abstract


The present study aimed to evaluate the applicability of photo-Fenton process for the degradation of a red colored commercial dye (Guarany® Tingecor 09). The process optimization was performed using a 23 factorial design, varying the volumes added of Fe3+ and H2O2 and the pH of the medium. The solutions containing the dye and the Fenton reagent were irradiated in a photoreactor equipped with a mercury vapor lamp of 125 W and the process development was accompanied by the acquisition of the absorption spectra UV-Vis in 10-minute intervals. The experimental design has shown that the best results were obtained with less amount of Fe3+ (0.1 ml), larger volume of H2O2 (1.0 mL) and pH 5. The efficiency of the dye decolorization was evaluated by a phytotoxicity test employing Lactuca sativa L. seeds. The results showed to be satisfactory for the dye decolorization, and the wastes produced in the degradation process didn’t show toxicity.

Keywords


Advanced Oxidative Processes; Dye; Environmental Chemistry; Photodegradation



DOI: http://dx.doi.org/10.5433/1679-0375.2016v37n1p81

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