PRELIMINARY RESEARCH OF LEACHING OF SPENT NIMH BATTERIES WITH CHOSEN ORGANIC ACIDS

1 GAJDA Bernadeta
Co-authors:
2 GĘGA Jerzy 3 KOŁODYŃSKA Dorota 3 HUBICKI Zbigniew
Institutions:
1 Czestochowa University of Technology, Department of Metals Extraction and Recycling, Czestochowa, Poland, EU, e-mail: gajda@wip.pcz.pl
2 Czestochowa University of Technology, Department of Chemistry, Czestochowa, Poland, EU
3 Department of Inorganic Chemistry, Maria Curie-Skłodowska University, Lublin, Poland, EU
Conference:
26th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 24th - 26th 2017
Proceedings:
Proceedings 26th International Conference on Metallurgy and Materials
Pages:
1714-1719
ISBN:
978-80-87294-79-6
ISSN:
2694-9296
Published:
9th January 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
23 views / 8 downloads
Abstract

Critical raw materials, such as rare earths (REEs), have a high economic importance for the EU, combined with a high risk associated with their supply depending on very limited sources. Therefore, the recovery of the RE elements is extremely important for both economic and environmental reasons. NiMH batteries contain nickel, cobalt, lanthanum and other REEs and can be used as a secondary source of those metals. One of possible methods of their recovery is a hydrometalurgicall process consisting of following steps: leaching of batteries, separation of metal ions from leach pregnant solution (LPS) and obtaining of final products (metals or their compounds). The presented paper deals with leaching of spent NiMH batteries in aqueous solutions of chosen organic acids (like acetic, lactic or tartaric). As a result, solutions containing nickel(II), cobalt(II), lanthanum(III), and cerium(III) ions with concentration up to 2.5, 0.4, 0.5, and 0.2 g/dm3, respectively, were obtained.

Keywords: NiMH batteries, leaching, recovery, nickel, rare earths
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