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High-gravity intensified iron-carbon micro-electrolysis for degradation of dinitrotoluene

Frontiers of Chemical Science and Engineering 2022年第11期16卷 1595-1605页

作者： Jiaxin Jing Weizhou Jiao Zhixing Li Kechang Gao Jingwen Zhang Gaomiao Ren Youzhi Liu Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering North University of ChinaTaiyuan 030051China

The application of iron–carbon(Fe–C)micro-electrolysis to wastewater treatment is limited by the passivation potential of the Fe–C *** order to address this problem,high-gravity intensified Fe–C micro-electrolysis was proposed in this study for degradation of dinitrotoluene wastewater in a rotating packed bed(RPB)using commercial Fe–C particles as the *** effects of reaction time,high-gravity factor,liquid flow rate and initial solution pH were *** degradation intermediates were determined by gas chromatography-mass spectrometry,and the possible degradation pathways of nitro compounds by Fe–C micro-electrolysis in RPB were also *** is found that under optimal conditions,the removal rate of nitro compounds reaches 68.4%at 100 *** removal rate is maintained at approximately 68%after 4 cycles in RPB,but it is decreased substantially from 57.9%to 36.8%in a stirred tank *** is because RPB can increase the specific surface area and the renewal of the liquid–solid interface,and as a result the degradation efficiency of Fe–C micro-electrolysis is improved and the active sites on the Fe–C surface can be regenerated for continuous *** conclusion,high-gravity intensified Fe–C micro-electrolysis can weaken the passivation of Fe–C particles and extend their service life.

关键词： high-gravity technology rotating packed bed Fe–C micro-electrolysis dinitrotoluene wastewater active sites

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