Decolorization of antraquinone dye Reactive Blue 181 solution by UV/H2O2 process
The UV–vis spectra of RB181 during its decolorization of 20min. [Display omitted] •A high decolorization efficiency of 99% for RB181 was achieved after 20min treatment with UV/H2O2 process.•Decolorization of RB181 depends on pH, H2O2 dose and dye concentration.•The decolorization kinetic of RB181 fo...
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Published in | Journal of photochemistry and photobiology. A, Chemistry. Vol. 299; pp. 67 - 72 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
15.02.2015
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Subjects | |
Online Access | Get full text |
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Summary: | The UV–vis spectra of RB181 during its decolorization of 20min.
[Display omitted]
•A high decolorization efficiency of 99% for RB181 was achieved after 20min treatment with UV/H2O2 process.•Decolorization of RB181 depends on pH, H2O2 dose and dye concentration.•The decolorization kinetic of RB181 followed pseudo-first-order reaction kinetic.•The decolorization of RB181 by UV/H2O2 and exposed that the oxidation process was exothermic under natural conditions.
In this study, the decolorization of C.I. Reactive Blue 181 (RB181), anthraquinone dye, by UV/H2O2 processes was investigated. The effects of operating parameters, such as H2O2 dosage, pH value, dye concentration and temperature were examined. The optimum conditions were determined as [H2O2]=500mg/L, [RB181]=500mg/L and pH 3 for 20min reaction time. The decolorization was achieved by the UV/H2O2 process because of the production of some oxidizing agents as a result of UV irradiation. The decolorization kinetic of RB181 followed pseudo-first-order reaction kinetic. Thermodynamic analysis showed negative values of ΔH indicating exothermic under natural conditions. |
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ISSN: | 1010-6030 1873-2666 |
DOI: | 10.1016/j.jphotochem.2014.11.003 |