Lactic acid-assisted complexation for enhanced lithium extraction and its application to spent LIBs

Sibananda SAHU; Niharbala DEVI

doi:10.55713/jmmm.v35i1.2245

ผู้แต่ง

Sibananda SAHU Department of Chemistry, Institute of Technical Education and Research, Siksha ‘O’ Anusandhan Deemed to be University, Bhubaneswar – 751030, Odisha, India
Niharbala DEVI Department of Chemistry, Institute of Technical Education and Research, Siksha ‘O’ Anusandhan Deemed to be University, Bhubaneswar – 751030, Odisha, India

DOI:

https://doi.org/10.55713/jmmm.v35i1.2245

คำสำคัญ:

Lithium, Solvent extraction, Lactate medium, D2EHPA, Spent LIBs

บทคัดย่อ

A novel approach for complexing lithium with lactic acid to enhance extraction efficiency and its application to spent LIBs was proposed in this study. Key parameters influencing the extraction were systematically examined, including lactic acid concentration, pH of the aqueous phase, concentration of extractant, diluent selection, phase ratio between organic and aqueous phase, and stripping efficiency. Lithium extraction showed a remarkable improvement, rising from 16% to 43%, as the lactic acid concentration enhanced from 0.01 mol∙L^‒1 to 1.0 mol∙L^‒1. This was achieved using D2EHPA (0.1 mol∙L^‒1) at a maintained pH of 6.5. Maximum lithium extraction of 84.5% was observed at an O/A ratio of 5:1. Kerosene was a suitable diluent found from the different diluents employed for extraction. The 0.1 mol∙L^‒1 D2EHPA exhibited a lithium loading capacity of 0.084 g∙L^‒1. This optimized process was further extended to recover Li from waste LIB. 99.9% of Co and 91.2% of Li were extracted in three stages of cross-current extraction. Na₂CO₃ was utilized as a stripping agent for separating Co and Li. Using 2.5 mol∙L^‒¹Na₂CO₃, almost 90% of the Li was precipitated as Li₂CO₃, and 99.8% of the Co was recovered.

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ประวัติผู้แต่ง

Sibananda SAHU, Department of Chemistry, Institute of Technical Education and Research, Siksha ‘O’ Anusandhan Deemed to be University, Bhubaneswar – 751030, Odisha, India

Department of Chemistry, Institute of Technical Education and Research, Siksha ‘O’ Anusandhan Deemed to be University

Niharbala DEVI, Department of Chemistry, Institute of Technical Education and Research, Siksha ‘O’ Anusandhan Deemed to be University, Bhubaneswar – 751030, Odisha, India

Department of Chemistry, Institute of Technical Education and Research, Siksha ‘O’ Anusandhan Deemed to be University

เอกสารอ้างอิง

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