Resumo

JARAMILLO-SIERRA, B. et al. Methylene blue degradation assessment by advanced oxidation methods. J. appl. res. technol [online]. 2019, vol.17, n.3, pp.172-179.  Epub 16-Abr-2020. ISSN 2448-6736.

Experimental investigation about methylene blue degradation in aqueous solution applying several Advanced Oxidation Processes such as O3, O3/H2O2, O3/UV and O3/UV/H2O2 was accomplished. Methylene blue treatment consisted in evaluating the degradation of an initial concentration of 22 ppm in 500 ml of aqueous solution. The contaminant degradation efficiencies were analyzed considering parameters such as: treatment time, three different pH values for the solution and O3 and H2O2 as oxidizing reagents. The discoloration of the samples was examined throughout the experimental each 10 minutes. Using O3/UV/H2O2 (10 ppm) with an initial 7 pH and a treatment time of 60 minutes the highest degradation efficiency of 98% was achieved.

Palavras-chave : Methylene blue; Advanced Oxidation Processes; Degradation efficiency.