A validation experiment on indium recovery by electrowinning of aqueous electrolytes: Optimization of electrolyte composition
| Autor: | Soo-Young Lee, Sung-Su Cho, Sungkyu Lee, Chan Gi Lee, Basudev Swain |
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| Rok vydání: | 2016 |
| Předmět: |
Scanning electron microscope
Mechanical Engineering Inorganic chemistry Atomic emission spectroscopy chemistry.chemical_element 02 engineering and technology Electrolyte 021001 nanoscience & nanotechnology Cathode 020501 mining & metallurgy law.invention chemistry.chemical_compound 0205 materials engineering chemistry Mechanics of Materials law General Materials Science Inductively coupled plasma 0210 nano-technology Phosphoric acid Indium Electrowinning |
| Zdroj: | Materials Testing. 58:1001-1004 |
| ISSN: | 2195-8572 0025-5300 |
| Popis: | A batch-type and lab-scale indium recovery method was developed via electrowinning (EW) to prove mass production-capability and economic recovery of indium from InCl3 crystals precipitated from the solvent extraction using a suitable phosphoric acid-based extractant. More precisely, the InCl3 crystals thus precipitated were further dissolved in three different aqueous electrolyte mixtures for subsequent electrowinning experiments: 0.05 M InCl3 – 0.7 M LiCl; 0.05M InCl3; 0.05 M InCl3 – 0.7 M NaCl. The effect of adding LiCl and NaCl supporting electrolytes to InCl3 on overall EW efficiency was thus comprehensibly investigated. Direct electroreduction of InCl3 using 0.05 M InCl3 aqueous electrolyte resulted in the highest indium metal purity of 99.996 % deposited on the copper cathode. Thus, metallic contents obtained from the validation experiments were further characterized using various analytical tools such as inductively coupled plasma/atomic emission spectroscopy (ICP/AES), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS) and X-ray fluorescence (XRF). |
| Databáze: | OpenAIRE |
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