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Processing of Abu Dob mineralized pegmatites, Central Eastern Desert, Egypt: a study on the kinetics of dissolution process and extraction of some valuable metals

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Abstract

The present work is concerned with preparing pure oxides of U, Zr, Th and REE from Abu Dob mineralized pegmatitic rock. The dissolution kinetic profiles were assigned to chemical reaction model for all interesting elements. The calculated apparent activation energy was 33.8, 23.67, 22.5, and 24.40 kJ mol−1 for U, Zr, Th, and REE respectively. Almost complete U extraction (99%) and 90.2% of Zr were first achieved using Alamine 336 at pH 0.8. Furthermore, Th was selectivily separated from REE in the raffinate solution through its precipitation using MgO followed by REE precipitation as oxalates at pH 1.1.

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Acknowledgements

Deep appreciation to Prof. T. E. Amer for the faithful discussion during the present work's progress, valuable advices, and critical reading of the manuscript. Deep appreciation also is due to Prof. O. El Hussaini for providing the working sample. The author is greatly indebted to Dr. W. Abdellah and Dr. M. Khalafalla for their valuable advices, continuous help in accomplishing this work.

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  1. Nuclear Materials Authority, El Maadi, Box: P.O. 530, Cairo, Egypt

    Hanaa A. Abu Khoziem

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Correspondence to Hanaa A. Abu Khoziem.

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Abu Khoziem, H.A. Processing of Abu Dob mineralized pegmatites, Central Eastern Desert, Egypt: a study on the kinetics of dissolution process and extraction of some valuable metals. J Radioanal Nucl Chem 331, 937–951 (2022). https://doi.org/10.1007/s10967-021-08134-8

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  • DOI: https://doi.org/10.1007/s10967-021-08134-8

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