Kinetic modeling for microwave-enhanced degradation of methylene blue using manganese oxide

Wen Hui Kuan, Chun Yuan Chen, Ching-Yao Hu, Yu Min Tzou

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

This study was originally performed to compare the MnObased degradation of aqueous methylene blue (MB) under microwave irradiation- (MW-) enhanced and conventional heating- (CH-) enhanced conditions. The degradation process and kinetics were investigated to elucidate the microwave effect on the reaction. The results showed that all three tested conditions, sole MnO MnOCH, and MnOMW, followed the third-order (second upon MB and first upon MnO kinetic model. However, a higher degradation rate of MB was available under the MW-enhanced process, which implies that the "athermal effect" of MW might be of more benefit for the generation of electrophilic oxygen ions (O 2 -, O -, and O 2 -) to degrade MB. The results showed that the degradation percentage of MB could reach 100%, corresponding to 92% total organic carbon (TOC) removal under microwave irradiation at pH 7.20 for 10 min.

Original languageEnglish
Article number916849
JournalInternational Journal of Photoenergy
Volume2013
DOIs
Publication statusPublished - 2013

Fingerprint

Manganese oxide
manganese oxides
Methylene Blue
methylene blue
Microwave irradiation
Microwaves
degradation
microwaves
Degradation
Kinetics
kinetics
irradiation
Organic carbon
oxygen ions
Heating
Oxygen
manganese oxide
Ions
heating
carbon

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)

Cite this

Kinetic modeling for microwave-enhanced degradation of methylene blue using manganese oxide. / Kuan, Wen Hui; Chen, Chun Yuan; Hu, Ching-Yao; Tzou, Yu Min.

In: International Journal of Photoenergy, Vol. 2013, 916849, 2013.

Research output: Contribution to journalArticle

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