Efficient degradation of Rhodamine B in microwave-H₂O₂ system at alkaline pH
2012
Hong, Jun | Yuan, Nannan | Wang, Yanxin | Qi, Shihua
Microwave-H₂O₂ (MW-H₂O₂) technology, one of the environmental treatment methods, was reported to usually prefer acidic and neutral circumstances in substrates’ degradation. In this work, degradation of Rhodamine B (RhB) and methylene blue (MB) in MW-H₂O₂ system was found to be very competitive at extreme alkaline pH. This is a new finding and few studies have noticed it yet. Through radical species’ tests and control experiments, degradation of RhB at strong alkaline pH in MW-H₂O₂ system was considered to mainly undergo oxygen oxidation, and the enhancement of MW thermal effect. This work provided a possible effective way to study the degradation at highly alkaline circumstances, and might promote the development of MW-H₂O₂ technology in alkaline wastewater treatment.
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