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4250637 
Journal Article 
Effect of Temperature on Methylene Blue Decolorization in Aqueous Medium in Electrical Discharge Plasma Reactor 
Benetoli, LOdeB; Cadorin, BM; Postiglione, CdaS; de Souza, IG; Debacher, NA 
2011 
Yes 
Journal of the Brazilian Chemical Society
ISSN: 0103-5053
EISSN: 1678-4790 
22 
9 
1669-1678 
WOS:000295800700008 
This study investigates the effect of bath solution temperature on methylene blue decolorization in a point-to-plate electrical discharge plasma reactor. The results show an increase in the initial percentage of dye decolorization with an increase in the bath solution temperature from 4 to 28 degrees C, but from 28 to 37 degrees C there was no change. However, when the temperature was raised to 47 degrees C the initial dye decolorization percentage decreased. The hydrogen peroxide (H(2)O(2)) formation in water during the plasma treatment decreased as the bath temperature increased from 4 to 47 degrees C. The dye decolorization reaction occurred via a complex mechanism where zero-and first-order processes took place at the same temperature, following zero-order in the initial step and first-order with the progress of the reaction. The activation energy involved in the first-order process was 13.09 kJ mol(-1.) 
methylene blue; decolorization; temperature effect; electrical discharge plasma