Methylthionine chloride degradation on pilot UV-C reactors: Kinetics of photolytic and heterogeneous photocatalytic reactions

Methylthionine Chloride (MTC), commonly known as methylene blue, is a substance widely used in medical and clinical industry indicator, various diseases treatment diagnostic. When MTC discarded out of the organism, it becomes residue which ends wastewater plants not treated or removed properly because has synthetic origin, providing with stability chemical structure difficult to break. In present work, was through advanced oxidation processes (AOPs) photolysis heterogeneous photocatalysis, three pH magnitudes (3.5, 7.2 9.5), comparing when 1 mMol H2O2/L sample added at beginning experiment. degradation reached 62.9 54.14%, for photocatalysis respectively, both acid conditions adding H2O2 sample. Kinetic constants (K) were calculated, showing more effective; likewise, half life time decreases under these conditions. With Student-t statistic test, K from compared, resulting acidic basic significantly different, but neutral.