期刊
INTERNATIONAL JOURNAL OF PHOTOENERGY
卷 2013, 期 -, 页码 -出版社
HINDAWI LTD
DOI: 10.1155/2013/916849
关键词
-
资金
- National Science Council of Taiwan, China [NSC 95-2622-E-131-008-CC3, NSC 96-2628-E-131-001-MY3]
This study was originally performed to compare the MnO2-based 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 MnO2, MnO2/CH, and MnO2/MW, followed the third-order (second upon MB and first upon MnO2) 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 O2-) 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.
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