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Investigation of the kinetics and optimization of photocatalytic degradation of methylene blue
Author(s) -
Farouq Rania
Publication year - 2018
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201800029
Subject(s) - chemistry , methylene blue , photocatalysis , titanium dioxide , degradation (telecommunications) , response surface methodology , pollutant , kinetics , catalysis , chemical engineering , nuclear chemistry , chromatography , organic chemistry , engineering , telecommunications , physics , quantum mechanics , computer science
Studying and optimizing the photocatalytic degradation of methylene blue dye in a tubular reactor using different types of titanium dioxide are the main concerns of the present research. Subsequent experiments using a heterogeneous process (UV/H 2 O 2 /TiO 2 ) were conducted to investigate the effects of the changing amounts of catalyst dosing, pH values, time, and the initial dye concentration on the process performance. Response‐surface methodology (RSM) experiment based on a mixture‐analysis experiment was applied. The results show that an initial dye concentration of 20 ppm at pH = 2 with the addition of H 2 O 2 (0.2 mL) to the pollutant stream represents the best conditions of the photocatalytic process with 97.6% of dye degradation when using 1.5 g TiO 2 /L of the pollutant solution. All the experimental data showed good agreement with the predicted results obtained from statistical analysis.