Hydrometallurgical treatment of spent lithium ion batteries using environmentally friendly leachant and extractant

Sahu, Sibananda; Devi, Niharbala

doi:10.1007/s10163-023-01754-0

Cited by 6 publications

(2 citation statements)

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“…For instance, hydrogen peroxide usage produces anthraquinone, a substance harmful to the environment . Therefore, seeking renewable and organic reductants, such as ascorbic acid (AA), emerges as a more environmentally friendly alternative . Consequently, proposing a synergistic leaching system characterized by lower total acid content, mild operating conditions, minimal environmental impact, and a commitment to ensure high leaching efficiencies is imperative.…”

Section: Introductionmentioning

confidence: 99%

“… 33 Therefore, seeking renewable and organic reductants, such as ascorbic acid (AA), emerges as a more environmentally friendly alternative. 34 Consequently, proposing a synergistic leaching system characterized by lower total acid content, mild operating conditions, minimal environmental impact, and a commitment to ensure high leaching efficiencies is imperative. Many researchers have predominantly focused their investigations on the leaching phase, 35 − 38 neglecting the significance of downstream processes essential for the retrieval of pure metals from the leach solution.…”

Section: Introductionmentioning

confidence: 99%

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Synergistic Approach for Selective Leaching and Separation of Strategic Metals from Spent Lithium-Ion Batteries

Sahu,

Agrawala,

Patra

et al. 2024

ACS Omega

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Recycling spent Li-ion batteries (LIBs) is paramount to pursuing resource efficiency and environmental sustainability. This study introduces a synergistic approach for selectively leaching and separating strategic metals from waste LIBs, representing a more efficient alternative to traditional single-acid-based leaching methods. The research also thoroughly analyzes diverse extraction parameters, aiming to achieve clean metal separation through synergistic concepts rather than single-phase extraction. The outcome of this study is developing a comprehensive downstream process, advancing the cause of sustainable waste management in the LIB industry. Under specific conditions with 0.6 mol/L total acid content (0.5 mol/L tartaric acid + 0.1 mol/L ascorbic acid), 99.9% cobalt and 100% lithium were effectively leached. The subsequent extraction process achieved a clean separation, with 48.3% of cobalt extracted using a mixture of 0.1 mol/L Alamine-336−Cyanex-272 (A-336−Cy-272) from the leach liquor with no coextraction of lithium, and this efficiency was improved to 67.3% by adjusting the pH from 2.44 to 7.5. However, it is worth noting that increasing the extractant concentration led to an antagonistic effect. To further enhance cobalt enrichment in the organic phase, the McCabe−Thiele plot method was recommended, employing saponified Cy-272. Moreover, the regeneration of saponified Cy-272 was investigated, and the stripped solution was processed with NaOH to form Co(OH) 2 , subsequently converting it into cobalt oxide (Co 3 O 4 ) through calcination.

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Section: Introductionmentioning

confidence: 99%