Recovery of valuable materials from spent NIMH batteries using spouted bed elutriation
| Autor: | Daniel Assumpção Bertuol, Guilherme Luiz Dotto, Diego Felipe Schlemmer, Mônica Lopes Aguiar, Eduardo Hiromitsu Tanabe |
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| Rok vydání: | 2015 |
| Předmět: |
Hazardous Waste
Environmental Engineering Waste management Polymers 02 engineering and technology General Medicine Management Monitoring Policy and Law Elutriation Models Theoretical 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Grinding Electric Power Supplies Hazardous waste Metals Environmental science Recycling Powders 0210 nano-technology Waste Management and Disposal Electrodes |
| Zdroj: | Journal of environmental management. 171 |
| ISSN: | 1095-8630 |
| Popis: | In recent years, a great increase in the generation of spent batteries occurred. Then, efficient recycling ways and correct disposal of hazardous wastes are necessary. An alternative to recover the valuable materials from spent NiMH batteries is the spouted bed elutriation. The aim of this study was to apply the mechanical processing (grinding and sieving) followed by spouted bed elutriation to separate the valuable materials present in spent NiMH batteries. The results of the manual characterization showed that about 62 wt.% of the batteries are composed by positive and negative electrodes. After the mechanical separation processes (grinding, sieving and spouted bed elutriation), three different fractions were obtained: 24.21 wt.% of metals, 28.20 wt.% of polymers and 42.00 wt.% of powder (the positive and negative electrodes). It was demonstrated that the different materials present in the spent NiMH batteries can be efficiently separated using a simple and inexpensive mechanical processing. |
| Databáze: | OpenAIRE |
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