Environmentally available biowastes as substrate in microbial fuel cell for efficient chromium reduction
| Autor: | Amarnath C. Bala, S. Harinipriya, Arvind Kumar Ray, M. Sindhuja |
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| Rok vydání: | 2017 |
| Předmět: |
Chromium
Environmental Engineering Microbial fuel cell Bioelectric Energy Sources Health Toxicology and Mutagenesis chemistry.chemical_element Industrial Waste 02 engineering and technology 010501 environmental sciences Wastewater Electrochemistry 01 natural sciences Waste Disposal Fluid chemistry.chemical_compound RNA Ribosomal 16S Electric Impedance Environmental Chemistry Waste Management and Disposal Effluent Potassium dichromate Electrodes 0105 earth and related environmental sciences biology Bacteria Tanning Geobacter metallireducens 021001 nanoscience & nanotechnology biology.organism_classification Pollution Anode Dielectric spectroscopy chemistry Biofilms Potassium Dichromate 0210 nano-technology Oxidation-Reduction Water Pollutants Chemical Nuclear chemistry |
| Zdroj: | Journal of hazardous materials. 355 |
| ISSN: | 1873-3336 |
| Popis: | Dual chambered microbial fuel cells with Potassium dichromate (22 g/L, MFC-1) and tannery effluent waste water containing 26 mg/L (MFC-2), 5 mg/L (MFC-3) of Cr(VI) as catholyte, sweet lime waste inoculated by cowdung as anolyte and graphite electrodes were used to reduce toxic Cr(VI) to Cr(III) with simultaneous power generation. Cr (VI) in the cathode chamber reduced to Cr2O3 within 24 h. Complete reduction of Cr(VI) from tannery effluents by microbial fuel cell is noticed within 10 days. The 16 s rRNA sequencing studies demonstrated presence of Geobacter Metallireducens in mixed culture bacteria in anaerobic anode. The power density of the device is 396.7 mW/m2on day1which is 7.2 times higher than literature data of 55.5 mW/m2. The processes involved on the biofilm/electrolyte interface and graphite/electrolyte interface is studied by Electrochemical Impedance Spectroscopy. Electrochemical studies demonstrated the active growth of biofilm on anode which reduces charge transfer resistance from day 1 to day 25. The concentration of Cr(VI) reduced in the present studies are approximately 1000 times higher than those reported in the literature. |
| Databáze: | OpenAIRE |
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