Degradation of rhodamine B in aqueous solution by using swirling jet-induced cavitation combined with H₂O₂

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• 作者：Xikui Wang ; Jingang Wang ; Peiquan Guo ; Weilin Guo ; Chen Wang
• 关键词：Rhodamine B ; Degradation ; Swirling jet-induced cavitation ; Hydrogen peroxide ; Synergetic effect
• 刊名：Journal of Hazardous Materials
• 出版年：2009
• 出版时间：30 September 2009
• 年：2009
• 卷：169
• 期：1-3
• 页码：486-491
• 全文大小：583 K

文摘

The degradation of rhodamine B in aqueous solution by using swirling jet-induced cavitation combined with H₂O₂ was investigated. It was found that there is an obvious synergetic effect between hydrodynamic cavitation and H₂O₂ for the degradation of rhodamine B. The effects of various operating parameters such as H₂O₂ dosage, medium pH, solution temperature, fluid pressure and the dye initial concentration on the degradation of rhodamine B have been studied. It was found that the removal of rhodamine B in aqueous solution was increased with increasing the addition of H₂O₂ and the fluid pressure, and the removal of rhodamine B was decreased with increasing the medium pH and dye initial concentration. It was also found that the degradation of rhodamine B is dependent on the solution temperature. The removal of rhodamine B increased with increase of temperature from 30 to 50 °C, but less degradation ratio is observed at 60 °C. The degradation kinetics of rhodamine B in aqueous solution using swirling jet-induced cavitation combined with H₂O₂ under various operational conditions was also investigated. It was found that the degradation of rhodamine B follows a pseudo-first-order kinetics.