A1 Journal article (refereed)
Optimization of Selective Hydrometallurgical Tantalum Recovery from E-Waste Using Zeolites (2024)
Koskinen, J., Frimodig, J., Samulinen, M., Tiihonen, A., Siljanto, J., Haukka, M., & Väisänen, A. (2024). Optimization of Selective Hydrometallurgical Tantalum Recovery from E-Waste Using Zeolites. ACS Omega, 9(13), 14947-14954. https://doi.org/10.1021/acsomega.3c08907
JYU authors or editors
Publication details
All authors or editors: Koskinen, Jutta; Frimodig, Janne; Samulinen, Mikko; Tiihonen, Antti; Siljanto, Jimi; Haukka, Matti; Väisänen, Ari
Journal or series: ACS Omega
ISSN: 2470-1343
eISSN: 2470-1343
Publication year: 2024
Publication date: 20/03/2024
Volume: 9
Issue number: 13
Pages range: 14947-14954
Publisher: American Chemical Society (ACS)
Publication country: United States
Publication language: English
DOI: https://doi.org/10.1021/acsomega.3c08907
Publication open access: Openly available
Publication channel open access: Open Access channel
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/94152
Abstract
To protect future high-tech metal demand, a selective and efficient recovery method for tantalum from a tantalum-rich e-waste component sample was developed. Ultrasound-assisted digestion of the component sample was optimized, and the highest dissolution rate was achieved using a mixture of 8 mol/L H2SO4 and HF at a temperature of 60 °C. The determined amount of tantalum was as high as 11 000 ± 1000 mg/kg, which results in a high potential for recyclable tantalum. The other major elements of this complex e-waste fraction were silicon, iron, aluminum, and tin. Efficient recovery of tantalum from the leachate was performed using the zeolite material ZSM-5. Extremely high selectivity and a recovery rate of over 98% were obtained. In terms of adsorption efficiency, selectivity, and durability of the material, optimal adsorption was obtained using the diluted sample at 0.5 mol/L of H2SO4. The adsorption capacity of ZSM-5 for tantalum was determined to be 10.5 ± 0.6 mg/g, and tantalum was selectively eluted with 1:4 diluted ethanolamine with a yield of 87.2 ± 1.5%.
Keywords: tantalum; recovery (recapture); waste electronic and electrical equipment; adsorption; zeolites; hydrometallurgy
Free keywords: adsorption; dissolution; materials; tantalum; zeolites
Contributing organizations
Ministry reporting: Yes
VIRTA submission year: 2024
Preliminary JUFO rating: 1