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      Hydronium jarosite activation of peroxymonosulfate for the oxidation of organic contaminant in an electrochemical reactor driven by microbial fuel cell.

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          Abstract

          Electro-assisted Fenton-like (EAFL) system based on sulfate radicals (SO4(-)) has been extensively explored for the degradation of recalcitrant organic contaminant. Nevertheless, external power supply should be provided uninterruptedly in the EAFL process and thus the high energy consumption is ineluctable. Recently, microbial fuel cell (MFC), a bio-electrochemical system where exoelectricigens are used to catalyze fuels into electricity energy has gained popularity mainly due to its renewability. Herein, a novel heterogeneous EAFL system, hydronium jarosite (HJ) activation of peroxymonosulfate (PMS) in an electrochemical reactor driven by an uncoated single-chamber MFC (MFC/HJ/PMS), was employed to decolorize acid orange 7 (AO7). The results suggest that the MFC/HJ/PMS system can remove AO7 efficiently in a wide pH range (3-9). The concentration of total iron leached could meet European Union discharge standards and hydronium jarosite could be used at least three circles. The results of electron paramagnetic resonance analysis and radical scavenging experiments indicate SO4(-) is the major active species responsible for the AO7 elimination. The work provides an efficient, energy-saving and cost-effective approach to treat organic wastewater and develops the conceivable utilization of hydronium jarosite, precipitates produced in hydrometallurgical process.

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          Author and article information

          Journal
          J. Hazard. Mater.
          Journal of hazardous materials
          Elsevier BV
          1873-3336
          0304-3894
          Jul 05 2017
          : 333
          Affiliations
          [1 ] Department of Environmental Engineering, Hubei Biomass-Resource Chemistry and Environmental Biotechnology Key Laboratory, Wuhan University, Wuhan 430079, China; College of Urban and Environmental Sciences, Hubei Normal University, Huangshi 435002, China.
          [2 ] Department of Environmental Engineering, Hubei Biomass-Resource Chemistry and Environmental Biotechnology Key Laboratory, Wuhan University, Wuhan 430079, China.
          [3 ] Department of Environmental Engineering, Hubei Biomass-Resource Chemistry and Environmental Biotechnology Key Laboratory, Wuhan University, Wuhan 430079, China; Shenzhen Research Institute of Wuhan University, Shenzhen 518057, China. Electronic address: eeng@whu.edu.cn.
          Article
          S0304-3894(17)30209-1
          10.1016/j.jhazmat.2017.03.043
          28410512
          af4166fc-8ade-4339-9163-ff4ade286d5b
          History

          Electro-assisted Fenton-like,Hydronium jarosite,Microbial fuel cell,Peroxymonosulfate,Sulfate radicals

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