Study on the extraction and separation of precious metals from wastewater using a hydrophobic deep eutectic solvent

Wang, Yifan; Song, Yonghui; Li, Yifan; Li, Jin; Bao, Jin; Zhang, Xinwei; Li, Bo

doi:10.1016/j.jece.2023.111102

Journal of Environmental Chemical Engineering

2023

DOI: 10.1016/j.jece.2023.111102

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Study on the extraction and separation of precious metals from wastewater using a hydrophobic deep eutectic solvent

Yifan Wang,

Yonghui Song,

Yifan Li

et al.

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Cited by 4 publications

References 51 publications

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Vortex-assisted hydrophobic natural deep eutectic solvent liquid-liquid microextraction for the removal of silver ions from environmental water

Wang,

Li,

Sun

et al. 2023

Anal Bioanal Chem

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Vortex-assisted hydrophobic natural deep eutectic solvent liquid-liquid microextraction for the removal of silver ions from environmental water

Wang,

Li,

Sun

et al. 2023

Anal Bioanal Chem

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Metal-organic frameworks for sustainable precious metal recovery: A review of recent advances

Zuhra,

Haris Khan,

Ali

et al. 2024

Chemical Engineering Journal

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Deep Eutectic Solvent-Aqueous Two-Phase Leaching System for Direct Separation of Lithium and Critical Metals

Septioga,

Fajar,

Wakabayashi

et al. 2024

ACS Sustainable Resour. Manage.

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Developing an effective recycling process for reclaiming valuable metals from lithium-ion batteries is an urgent issue owing to increasing battery waste from electric vehicles. In this study, we developed a leaching method that enables the direct separation of lithium from other critical metals, namely, nickel and cobalt, using a two-phase system that consists of a deep eutectic solvent (DES) and water. The DES consisting of 4,4,4-trifluoro-1-phenyl-1,3-butadione and tri-noctylphosphine oxide showed the highest leaching performance when combined with water. Several operational parameters, such as the aqueous fraction, solidliquid ratio, reaction time, and operation temperature, were evaluated. The optimum results in the two-phase direct leaching system were obtained using a 1:1 DES-water ratio and 10 g/L solid-liquid ratio, reacted at 80 °C for 24 h. An in-situ stripping phenomenon was observed, revealing that lithium transferred from the DES phase to the aqueous phase. In the application of black mass leaching, the aqueous phase significantly enhanced Co, Ni, and Mn extraction into the DES phase and thus plays an important role in separating lithium from other metals. The efficiency of direct lithium leaching from the black mass reached 99% within 24 h.

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Study on the extraction and separation of precious metals from wastewater using a hydrophobic deep eutectic solvent

Cited by 4 publications

References 51 publications

Vortex-assisted hydrophobic natural deep eutectic solvent liquid-liquid microextraction for the removal of silver ions from environmental water

Vortex-assisted hydrophobic natural deep eutectic solvent liquid-liquid microextraction for the removal of silver ions from environmental water

Metal-organic frameworks for sustainable precious metal recovery: A review of recent advances

Deep Eutectic Solvent-Aqueous Two-Phase Leaching System for Direct Separation of Lithium and Critical Metals

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