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    • Uranium Separation from Bangka Monazite by Solvent Extraction Method Using Tri Octyl Amine (TOA)

    Kurnia Trinopiawan,Riesna Prassanti,Aditya Widian Putra,Budi Yuli Ani, Rachmat Fauzi Hidayat, Rommy,Kurnia Setiawan Widana,Agus Sumaryanto,Yarianto Sugeng Budi Susilo

    INTERNATIONAL CONFERENCE ON NUCLEAR SCIENCE, TECHNOLOGY, AND APPLICATIONS – ICONSTA 2022 AIP Conference Proceedings（2024）

    National Nuclear Energy Agency of Indonesia

    Cited 0|Views3
    Abstract
    Monazite as a by-product of tin mining, contains elements of rare earth (REE) as well as radioactive elements such as uranium (U) and thorium (Th). Research and development of monazite processing at the Center for Nuclear Minerals Technology - National Nuclear Energy Agency (PTBGN-BATAN) has succeeded in separating REE as a hydroxide compound with 85% recovery through the stages of decomposition, partial dissolution, partial precipitation, and total precipitation. From the process, U and Th were mostly concentrated in the residue of partial dissolution and partial precipitation and had not been separated. In this research, U and Th will be separated by solvent extraction method using Tri Octyl Amine (TOA) in kerosene and isodecanol as a modifier. The purpose of this study was to obtain the optimum conditions for separating uranium in monazite by solvent extraction method where the parameters studied included the ratio of Organic/Aqueous (O/A), pH, temperature, and extraction time. The results showed that the optimum extraction conditions were O/A ratio=4/1, pH 1.5, temperature 30 ℃ (room temperature), and extraction time of 2 minutes with U and Th recovery are 99.87% and Th 63.03% respectively. Meanwhile REE and metal impurities such as Ca, Fe, and Mg were not extracted in the organic solution.
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