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

Autor: Hui Zhang, Jinyao Geng, Suding Yan, Rui Guo, Yue Du
Rok vydání: 2016
Předmět:
Environmental Engineering
Microbial fuel cell
Hydronium
Bioelectric Energy Sources
Health
Toxicology and Mutagenesis
Iron
Inorganic chemistry
02 engineering and technology
010501 environmental sciences
engineering.material
Wastewater
Electrochemistry
01 natural sciences
Ferric Compounds
law.invention
Water Purification
chemistry.chemical_compound
law
Jarosite
Environmental Chemistry
media_common.cataloged_instance
European union
Organic Chemicals
Electron paramagnetic resonance
Waste Management and Disposal
Scavenging
0105 earth and related environmental sciences
media_common
Sulfates
Benzenesulfonates
Electron Spin Resonance Spectroscopy
Electrochemical Techniques
Hydrogen Peroxide
021001 nanoscience & nanotechnology
Pollution
Peroxides
chemistry
engineering
0210 nano-technology
Azo Compounds
Oxidation-Reduction
Water Pollutants
Chemical
Zdroj: Journal of hazardous materials. 333
ISSN: 1873-3336
Popis: 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.
Databáze: OpenAIRE
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