Improvement Study of Hydrometallurgical Treatment Process for Li-ion Batteries Waste

Nango Gaye

Laboratory of Physical, Inorganic, Organic and Therapeutic Chemistry, Faculty of Medicine, Pharmacy and Odontology, Cheikh Anta Diop University of Dakar (UCAD), Senegal.

Rokhaya Sylla Gueye *

Laboratory of Physical, Inorganic, Organic and Therapeutic Chemistry, Faculty of Medicine, Pharmacy and Odontology, Cheikh Anta Diop University of Dakar (UCAD), Senegal.

Gorgui Awa Seck

Gaston Berger University of Saint-Louis (U.G.B.), U.F.R. S.E.F.R., PB 234, Senegal.

Mamadou Baldé

Laboratory of Physical, Inorganic, Organic and Therapeutic Chemistry, Faculty of Medicine, Pharmacy and Odontology, Cheikh Anta Diop University of Dakar (UCAD), Senegal.

Mamour Sarr

Laboratory of Organic Coordination Chemistry, Faculty of Sciences and Technologies, (UCAD), Senegal.

Alassane Traoré

Laboratory, Institute of Applied Nuclear Technologies, (UCAD), Senegal.

Ngoné Diouf

Laboratory of Physical, Inorganic, Organic and Therapeutic Chemistry, Faculty of Medicine, Pharmacy and Odontology, Cheikh Anta Diop University of Dakar (UCAD), Senegal and Laboratory of Organic Coordination Chemistry, Faculty of Sciences and Technologies, (UCAD), Senegal.

Youssou Ndao

Laboratory of Galenic and Legislation, Faculty of Medicine, Pharmacy and Odontology (UCAD), Senegal.

El Hadj Ibrahima Thiam

Laboratory of Organic Coordination Chemistry, Faculty of Sciences and Technologies, (UCAD), Senegal.

Mahy Diaw

Analytical Materials, Electrochemistry and Photochemistry Team (EMEPA), Department of Chemistry, UFR SATIC, University Alioune Diop of Bambey, PB 30, Senegal.

*Author to whom correspondence should be addressed.


Abstract

This study concerned the search for a method aimed at improving the safety of the treatment of Li-ion (Lib) battery waste. It consisted in the extraction of the electrolyte from used Libs by methanol before the hydrometallurgical treatment. As a result, the infrared extracts characterization, after concentration, revealed the presence of characteristic vibrations of organic functions or chemical bonds other than those of the methanol used, prompting the search for other constituents (P, F, Li) generally found in the electrolyte compositions of Lib. Furthermore, the pretreated cathodes are cut and subjected to selective leaching with 4N NaOH for 60 minutes according to a liquid/solid ratio L/S=10 L/Kg at ambient temperature. Alkaline leachates and black residues were quantified by X-ray fluorescence and results showed higher recovery rates for aluminum. It thus seemed that the pretreatment of the cathodic samples decreased the leaching rates. In addition, the pre-treatment of the samples has been shown to reduce the polluting nature of selective leaching, and the extraction of the electrolyte by methanol allowed the recovery of copper at the anode without any hydrometallurgical treatment.

Keywords: Electrolyte, methanolic pretreatment, alkaline leaching


How to Cite

Gaye , Nango, Rokhaya Sylla Gueye, Gorgui Awa Seck, Mamadou Baldé, Mamour Sarr, Alassane Traoré, Ngoné Diouf, Youssou Ndao, El Hadj Ibrahima Thiam, and Mahy Diaw. 2023. “Improvement Study of Hydrometallurgical Treatment Process for Li-Ion Batteries Waste”. Asian Journal of Applied Chemistry Research 14 (2):46-55. https://doi.org/10.9734/ajacr/2023/v14i2263.

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