A Study on Recovery of Cerium by Leaching Solvents from NiMH Waste Battery

• Autorzy: Kim Boram , Kim Dae-Weon , Choi Hee Lack

Identyfikatory

DOI

10.24425/amm.2023.141480

• Języki publikacji: EN

Abstrakty

EN

In this study, a rare earth composite precipitation (NaREE(SO₄)₂H₂O, REE: Ce, La, Nd, Pr) powder was prepared from spent nickel hydride batteries, and cerium hydroxide was separated from its constituent rare earth elements. As Ce(OH)₃ can be oxidized more easily than other rare earth elements (La, Nd, and Pr), Ce³⁺ was converted to Ce⁴⁺ by injecting air into the leachate at 80°C for 4 h. The oxidized powder was leached using sulfuric and hydrochloric acids. Because Ce(OH)₄ has low solubility, it can be separated from other elements. Therefore, the pH of the leaching solution was adjusted for selective precipitation. To determine the crystalline phase, recovery, and grade of the recovered Ce(OH)₄, the powders were analyzed using X-ray diffraction, scanning electron microscopy, and inductively coupled plasma optical emission spectroscopy. The grade and recovery rates of the Ce(OH)₄ powder recovered from the rare earth composite precipitate using sulfuric acid as the solvent were 95% and 97%, respectively, whereas those of the powder recovered using hydrochloric acid were 96% and 95%, respectively.

Słowa kluczowe

EN

NiMH; cerium recovery; rare earth composite powder

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2023
• Tom: Vol. 68, iss. 1
• Strony: 103--106
• Opis fizyczny: Bibliogr. 15 poz., fot., rys., tab.

Twórcy

autor

Kim Boram

• Institute for Advanced Engineering, Advanced Material & Processing Center, 175-28 Goan-ro, 51 Beon-gil, Yongin-si, Gyeonggi, 17180, Korea

• https://orcid.org/0000-0002-3550-2241

autor

Kim Dae-Weon

• Institute for Advanced Engineering, Advanced Material & Processing Center, 175-28 Goan-ro, 51 Beon-gil, Yongin-si, Gyeonggi, 17180, Korea

• https://orcid.org/0000-0002-0718-9278

autor

Choi Hee Lack

• Pukyong National University, Department of Material Science & Engineering, 45, Yongso-ro, Nam-gu, Busan, 48513, Republic of Korea

• https://orcid.org/0000-0002-4190-1986

Bibliografia

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Uwagi

1. This work was supported by a Research Grant of Pukyong National University (2021 year).

2. Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).