Validation of The Gravimetry Method for Determining Rare Earth Elements Oxides

Afiq Azfar Pratama, Amalia Ekaputri Hidayat, Rommy Rommy, Suci Indryati, Roza Indra Laksmana, Kurnia Trinopiawan, Tri Purwanti, Kurnia Setiawan Widana, Aditya Widian Putra, Mutia Anggraini, Dzaki Hasan Nasrullah

DOI: http://dx.doi.org/10.55981/eksplorium.2024.6972

Abstract


The demand for minerals to meet technological developments is increasing, including minerals that contain rare earth elements (REE). The levels of REE in solids can be determined using conventional analysis methods (gravimetry) and instruments. Even though the instrument method provides more accurate results with a small amount of analyte, the cost is higher compared to the gravimetric method, which requires more analyte and provides good results. Therefore, the gravimetric method is a solution for areas with limited instruments and budgets. The study aims to validate the gravimetric method for determining REE oxides levels, evaluate its precision and accuracy, and assess its feasibility of use. In this study, two methods were used for REE analysis: the ASTM E2941-14 method with sample weight modification and the addition of acid to increase REE oxides recovery and a precipitation method using oxalic acid. The validation stages include sample dissolution, precipitation, filtration, and ash-making. The research results show that the RSD value is 0.3154, which is smaller than 2/3 of Horwitz's CV, namely 4.1727, which means it meets the precision acceptance requirements of ISO/IEC 17025:2017. The REE oxides recovery value, which indicates accuracy, also increased to 97.74%. Therefore, the gravimetric method can be used as an alternative for determining REE oxides levels.


Keywords


gravimetric methods; method validation; oxalic acid; REE oxides

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References


[1] S. M. Jowitt, “Mineral economics of the rare-earth elements,” MRS Bull, vol. 47, no. 3, pp. 276–282, 2022, doi: 10.1557/s43577-022-00289-3.

[2] N. Aziz et al., “Separation of Dysprosium (Dy) from Rare Earth Hidroxide Using Precipitation Methods,” Materials Science Forum, vol. 1093, pp. 133–137, 2023, [Online]. Available: https://api.semanticscholar.org/CorpusID:260072318

[3] G. Torta, L. Ciacci, I. Vassura, and F. Passarini, “Exploring mass and economic potentials of rare earth elements recycling from electric vehicles at end-of-life,” Mineral Economics, 2024, doi: 10.1007/s13563-024-00433-2.

[4] R. Prassanti, J. N. Kurniawan, K. Trinopiawan, Y. S. B. Susilo, and K. S. Widana, “Rare Earth Precipitation from Chloride Solution with Oxalic Acid in Monazite Processing,” in AIP Conference Proceedings, 2024. doi: 10.1063/5.0192886.

[5] Y. Wang, P. Ziemkiewicz, and A. Noble, “A Hybrid Experimental and Theoretical Approach to Optimize Recovery of Rare Earth Elements from Acid Mine Drainage Precipitates by Oxalic Acid Precipitation,” Minerals, vol. 12, no. 2, 2022, doi: 10.3390/min12020236.

[6] A. Nawab, X. Yang, and R. Honaker, “Parametric study and speciation analysis of rare earth precipitation using oxalic acid in a chloride solution system,” Miner Eng, vol. 176, 2022, doi: 10.1016/j.mineng.2021.107352.

[7] “General requirements for the competence of testing and calibration laboratories,” International Standardization Organization. Accessed: Oct. 13, 2023. [Online]. Available: https://www.iso.org/publication/PUB100424.html

[8] S. S. C. Sajima, “Sintesis dan Sertifikasi Bahan Acuan Bersertifikat (CRM) Zirkonia Hasil Olah Pasir Zirkon,” GANENDRA Majalah IPTEK Nuklir, vol. 19, no. 1, 2016, doi: 10.17146/gnd.2016.19.1.2778.

[9] Abhilash and A. Akcil, “Critical and Rare Earth Elements - Recovery from Secondary Resources,” Taylor & Francis Group, no. December. 2020.

[10] K. N. Han, “Characteristics of precipitation of rare earth elements with various precipitants,” Minerals, vol. 10, no. 2, Feb. 2020, doi: 10.3390/min10020178.

[11] EURAMET et al., Guidelines on the Determination of Uncertainty in Gravimetric Volume Calibration. 2018.

[12] A. I. M. Committee, Standard method performance requirements-AOAC International methods committee guidelines for validation of biological threat agent methods and/or procedures, vol. 94. 2011.

[13] D. N. Faridah, D. Erawan, K. Sutriah, A. Hadi, and F. Budiantari, Implementasi SNI ISO/IEC 17025:2017 Persyaratan Umum Kompetensi Laboratorium Pengujian dan Laboratorium Kalibrasi, Pertama (2018). Jakarta Pusat: Badan Standarisasi Nasional, 2018.

[14] V. Barwick et al., The fitness for purpose of analytical methods. Eurachem, 2014.

[15] “Standard Practices for Extraction of Elements from Ores and Related Metallurgical Materials by Acid Digestion 1,” American Society for Testing and Material Standards. [Online]. Available: www.astm.org,

[16] M. Peiravi et al., “A Review of Rare-Earth Elements Extraction with Emphasis on Non-conventional Sources: Coal and Coal By-products, Iron Ore Tailings, Apatite, and Phosphate By-products,” Mining, Metallurgy and Exploration, vol. 38, no. 1. 2021. doi: 10.1007/s42461-020-00307-5.

[17] R. Chi and Z. Xu, “A solution chemistry approach to the study of rare earth element precipitation by oxalic acid,” Metallurgical and Materials Transactions B, vol. 30, no. 2, pp. 189–195, Apr. 1999, doi: 10.1007/s11663-999-0047-0.

[18] S. Peelman, D. Kooijman, J. Sietsma, and Y. Yang, “Hydrometallurgical Recovery of Rare Earth Elements from Mine Tailings and WEEE,” Journal of Sustainable Metallurgy, vol. 4, no. 3, pp. 367–377, Sep. 2018, doi: 10.1007/s40831-018-0178-0.

[19] ORE Research & Exploration, “OREAS 464 Certificate,” ORE Research & Exploration. Accessed: Oct. 12, 2023. [Online]. Available: https://www.oreas.com/crm/oreas-464/


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