Novel bentonite particle electrodes based on Fenton catalyst and its application in Orange II removal

作者：Qiao, Nannan; Chang, Jiali; Hu, Mengxiao; Ma, Hongzhu^*

来源：Desalination and Water Treatment, 2016, 57(36): 17030-17038.

DOI：10.1080/19443994.2015.1083889

• Fe-Bent
• Green tea extracts
• Orange II
• 3D/E-Fenton

Novel particle electrodes, Fe species-modified bentonite (Fe-Bent) were synthesized using a rapid and completely green method employing aqueous green tea extracts as both the reducing and capping agents. The prepared Fe-Bent was characterized using UV-vis spectra, X-ray diffraction, Brunauer-Emmett-Teller, and Fourier transform infrared spectra techniques, and then utilized as heterogeneous Fenton catalyst to constitute a three-dimensional electro-Fenton (3D/E-Fenton) system for decolorization of orange II in aqueous solution. Batch experiment results show that 98.89 and 71.57% of decolorization and chemical oxygen demand (COD) removal were obtained at 0.5g of Fe-Bent dosage, 0.05molL(-1) Na2SO4, and initial solution pH of 6.4, respectively. The evolution of instantaneous current efficiency shows that the 3D/E-Fenton system exhibited higher efficiency for orange II degradation than that of 2D system. In addition, the possible mechanism of the 3D/E-Fenton system in the degradation of orange II was also discussed.

• 出版日期2016-8
• 单位陕西师范大学