Degradation of Rhodamine B by the α-MnO2/Peroxymonosulfate System

作者：Liu, Chaonan; Pan, Dongyu; Tang, Xiaoyan; Hou, Meifang^*; Zhou, Qi; Zhou, Jian

来源：Water, Air, and Soil Pollution, 2016, 227(3): 92.

DOI：10.1007/s11270-016-2782-6

• Peroxymonosulfate
• Heterogeneous catalysts
• Hydrothermal method
• Manganese oxides
• Rhodamine B

Rhodamine B (RhB) is one of synthetic dyes with good stability. Treatment of wastewater containing synthetic dyes has attracted much attention. Heterogeneous activation of peroxymonosulfate (PMS) has been found to be a promising wastewater treatment technology through the activation with metal oxides for the generation of sulfate radicals. In this study, alpha-MnO2 was prepared by a simple hydrothermal method and used as the catalyst to activate PMS. The degradation of RhB was studied by the alpha-MnO2/PMS system. It was found that the prepared alpha-MnO2 exhibited high catalytic activity on the activation of PMS for the degradation of RhB. The degradation of RhB could be well described by the first-order kinetic model. Influences of PMS concentration and alpha-MnO2 dose on the degradation of RhB were examined. The chemical oxygen demand (COD) was determined to evaluate the mineralization capability of the alpha-MnO2/PMS system. The stability of alpha-MnO2 was also investigated through reusability experiments. Quenching tests of radicals were applied to differentiate the contribution of major reactive species for the degradation of RhB by the alpha-MnO2/PMS system.

• 出版日期2016-3
• 单位暨南大学; 上海应用技术大学