Recovery of manganese oxides from spent alkaline and zinc-carbon batteries. An application as catalysts for VOCs elimination
| Autor: | Jorge Enrique Sambeth, María Victoria Gallegos, Horacio J. Thomas, Lorena Falco, Miguel Andrés Peluso |
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| Rok vydání: | 2012 |
| Předmět: |
Inorganic chemistry
Oxide chemistry.chemical_element Zinc Manganese INGENIERÍAS Y TECNOLOGÍAS Biohydrometallurgy Catalysis Electrolysis law.invention Heptanes chemistry.chemical_compound Batteries Acidithiobacillus thiooxidans Bioreactors Electric Power Supplies Potassium Permanganate X-Ray Diffraction law Spectroscopy Fourier Transform Infrared Chemical Precipitation Recycling Waste Management and Disposal Heptane biology Manganese oxides Ethanol technology industry and agriculture VOCs Oxides biology.organism_classification Carbon Refuse Disposal Ingeniería Química chemistry Manganese Compounds Otras Ingeniería Química Leaching (metallurgy) |
| Zdroj: | Waste management (New York, N.Y.). 33(6) |
| ISSN: | 1879-2456 |
| Popis: | Manganese, in the form of oxide, was recovered from spent alkaline and zinc–carbon batteries employing a biohydrometallurgy process, using a pilot plant consisting in: an air-lift bioreactor (containing an acid-reducing medium produced by an Acidithiobacillus thiooxidans bacteria immobilized on elemental sulfur); a leaching reactor (were battery powder is mixed with the acid-reducing medium) and a recovery reactor. Two different manganese oxides were recovered from the leachate liquor: one of them by electrolysis (EMO) and the other by a chemical precipitation with KMnO4 solution (CMO). The non-leached solid residue was also studied (RMO). The solids were compared with a MnOx synthesized in our laboratory. The characterization by XRD, FTIR and XPS reveal the presence of Mn2O3 in the EMO and the CMO samples, together with some Mn4+ cations. In the solid not extracted by acidic leaching (RMO) the main phase detected was Mn3O4. The catalytic performance of the oxides was studied in the complete oxidation of ethanol and heptane. Complete conversion of ethanol occurs at 200 °C, while heptane requires more than 400 °C. The CMO has the highest oxide selectivity to CO2. The results show that manganese oxides obtained using spent alkaline and zinc–carbon batteries as raw materials, have an interesting performance as catalysts for elimination of VOCs Fil: Gallegos, María Victoria. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Planta Piloto Multiproposito; Argentina Fil: Falco, Maria Lorena Romina. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Planta Piloto Multiproposito; Argentina Fil: Peluso, Miguel Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Centro de Investigación y Desarrollo En Ciencias Aplicadas; Argentina Fil: Sambeth, Jorge Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Centro de Investigación y Desarrollo En Ciencias Aplicadas; Argentina Fil: Thomas, Horacio Jorge. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Planta Piloto Multiproposito; Argentina |
| Databáze: | OpenAIRE |
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