Oxidation of Methyl Orange Solution with Potassium Peroxydisulfate

Document Type : Research Note

Authors

1 Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, College of Chemistry and harmaceutical Engineering, Sichuan University of Science and Engineering, Zigong, CHINA

2 Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, College of Chemistry and Pharmaceutical Engineering, Sichuan University of Science and Engineering, Zigong, CHINA

Abstract

Oxidation of Methyl Orange (MO) solution in potassium peroxydisulfate (KPS) homogeneous reaction system without UV irradiation was investigated. The result shows that decolorization of MO increases as the dosage of K2S2O8 increases. The kinetic results demonstrate that the decolorization reaction is a pseudo first-order reaction when the concentration of MO is below 10 mg/L and Langmuir–Hinshewood kinetic model (L-H) can well described it, the value of Ea is 19.5 kJ/mol. The decolorization efficiency is low when the pH value is low (≤2). Result of CODCr shows MO can be effectively mineralized with KPS direct oxidation. The knowledge on the kinetics of the system and influence of some parameters on the system possesses both practical and theoretical values.

Keywords

Main Subjects

References

[1]  Kar A., Smith Y.R., Subramanian V., Improved Photocatalytic Degradation of Textile Dye Using Titanium Dioxide Nanotubes Formed Over Titanium Wires, Environ. Sci. Technol,43, p. 3260 (2009).
[2] Mahmoodi N.M., Arami M., Degradation and Toxicity Reduction of Textile Wastewater Using Immobilized Titania Nanophotocatalysis, J. Photoch. Photobio. B: Biology, 94, p. 20 (2009).
[3]  Augugliaro V., Baiocchi C., Prevot A., Lopez B.E., Loddo L., Malato V., Marc S., Palmisano G., Pazzi L., Pramauro M., Azo-Dyes Photocatalytic Degradation in Aqueous Suspension of TiO2 Under Solar Irradiation, Chemosphere, 49, p. 1223 (2002).
[4] Behnajady M.A., Modirshahla N., Ghanbary F., A Kinetic Model for the Decolorization of C.I. Acid Yellow 23 by Fenton Process, J. Hazard. Mater, 148, p. 99 (2007).
[5] Chagas E.P., Durrant L.R., Decolorization of Azo Dyes by Phanerochate Chrysosporium and Pleurotus Sajorcaju, Enzyme Microbiol. Technol, 29, p. 473 (2001).
[6] McCallum J.E.B., Madison S.A., Alkan S., Depinto R.L., Wahl R.U.R., Analytical Studies  on the Oxidative Degradation of the Reactive Textile Dye Uniblue A, Environ. Sci. Technol, 34, p. 5157 (2000).

Files

Share

How to cite

Statistics