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 editorsKoskinen, Jutta; Frimodig, Janne; Samulinen, Mikko; Tiihonen, Antti; Siljanto, Jimi; Haukka, Matti; Väisänen, Ari

Journal or seriesACS Omega

ISSN2470-1343

eISSN2470-1343

Publication year2024

Publication date20/03/2024

Volume9

Issue number13

Pages range14947-14954

PublisherAmerican Chemical Society (ACS)

Publication countryUnited States

Publication languageEnglish

DOIhttps://doi.org/10.1021/acsomega.3c08907

Publication open accessOpenly available

Publication channel open accessOpen 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%.


Keywordstantalumrecovery (recapture)waste electronic and electrical equipmentadsorptionzeoliteshydrometallurgy

Free keywordsadsorption; dissolution; materials; tantalum; zeolites


Contributing organizations


Ministry reportingYes

VIRTA submission year2024

Preliminary JUFO rating1


Last updated on 2024-03-07 at 20:06