Open AccessDecoloration of methylene blue simulated wastewater using a UV-H2O2 combined system
Author(s) -
L. V. Jianxiao,
Ying Cui,
Xie Guo-hong,
Lingyun Zhou,
Sufen Wang
Publication year - 2011
Publication title -
journal of water reuse and desalination
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.548
H-Index - 16
eISSN - 2408-9370
pISSN - 2220-1319
DOI - 10.2166/wrd.2011.019
Subject(s) - methylene blue , chemistry , wastewater , kinetics , degradation (telecommunications) , photodissociation , methylene , irradiation , photochemistry , nuclear chemistry , chromatography , environmental engineering , organic chemistry , catalysis , photocatalysis , environmental science , telecommunications , physics , quantum mechanics , computer science , nuclear physics
Methylene blue simulated wastewater was treated with a UV-H 2 O 2 combined system. Influences of factors such as reaction time, initial pH value and H 2 O 2 dosage were investigated, and the reaction kinetics of the process was explored. Results showed that the degradation of methylene blue happened only in the presence of both conditions: UV irradiation and H 2 O 2 addition. Initial pH and H 2 O 2 dosage had a remarkable influence on the degradation efficiency. Through several groups of univariate experiments, the optimum pH and H 2 O 2 dosage of the photolysis process were found to be 4–5 and 0.165 mL 30% H 2 O 2 per milligram of methylene blue, respectively. The photolysis process was relatively fast at the initial stage and, 20 min later, it was approximately in accordance with the first-order kinetic equation.
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