Towards the challenging REE exploration in Indonesia

Setiawan, Iwan

doi:10.1088/1755-1315/118/1/012075

Cited by 9 publications

(5 citation statements)

References 6 publications

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“…Mineral ini tidak dapat dikuantifikasi, karena pertukaran unsur dengan valensi 3+ berlangsung dalam skala ion. Beberapa area di Indonesia berpotensi untuk mengandung keterdapatan REE sebagai tipe ion adsorpsi, terutama pada batuan granitoid yang berkomposisi asam [14,15], regolith volkanik [17], red mud [18]. Pengayaan unsur Large Ion Litophile Elements (LILE) seperti Cs, Sr, Pb serta defisiensi unsur Nb dan Ta menunjukkan perunut dari proses dehidrasi dari slab dari kerak bumi yang terbawa ke mantel [19].…”

Section: Gambarunclassified

Mineralogi dan Mobilitas Unsur pada Lithium dan Logam Tanah Jarang pada Lumpur Sidoarjo (Lusi), Indonesia

Hakim

Anggayana²,

Indriati³

et al. 2022

J. Geosapta

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Lumpur Sidoarjo (Lusi) merupakan manivestasi gunung lumpur (mud volcano) yang mengeluarkan erupsi sejak Mei 2006 hingga saat ini. Kegiatan penelitian dengan fokus elemen tanah jarang pada Lusi menjadi perhatian karena volume lumpur yang terus bertambah, serta potensi logam yang bernilai ekonomis. Studi ini bertujuan untuk mengetahui mineralogi Lusi berdasarkan studi mikroskopi optik dan elektron, serta konfirmasi dari geokimia untuk memahami kelimpahan unsur. Sampel didominasi seperti kuarsa, Ca-feldspar, mineral filosilikat seperti muskovit. Kaolinit teramati pada semua sampel, merupakan mineral lempung yang dapat menangkap elemen tanah jarang (rare-earth element) melalui mekanisme adsorpsi dan substitusi ion. Analisa geokimia menunjukkan kelimpahan unsur lithium pada Lusi mengalami pengayaan sebanyak 3 hingga 5 kali jika dibandingkan dengan kelimpahan unsur di kerak bumi. Terdapat korelasi unsur yang kuat antara unsur lithium (r>0,8) dengan Sr, Rb, Be, K, Cs, diduga terkayakan pada mineral silikat dengan struktur berlapis seperti kaolinit dan muskovit. Unsur light rare-earth elements menunjukkan kelimpahan yang lebih tinggi dengan heavy rare-earth elements. Lithium merupakan unsur yang menarik untuk dieksplorasi lebih lanjut karena mengalami pengayaan dan kemungkinan berikatan membentuk garam klorida atau mineral lain. Logam tanah jarang, walaupun mengalami pengayaan, dengan kondisi ilmu pengetahuan saat ini bukan merupakan target utama untuk kegiatan eksplorasi lanjutan.

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Section: Gambarunclassified

Mineralogi dan Mobilitas Unsur pada Lithium dan Logam Tanah Jarang pada Lumpur Sidoarjo (Lusi), Indonesia

Hakim

Anggayana²,

Indriati³

et al. 2022

J. Geosapta

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“…REE are rarely used in various industrial fields such as the nuclear industry, steel metallurgy, electronics, optics, superconductors, magnets, TV colour tubes and others. REE are very useful for the development of new materials and are commercial materials with high economic value [6]- [8].…”

Section: Introductionmentioning

confidence: 99%

An experimental design approach for determination of rare earth elements as a complex with DTPA ligand by voltammetry method

Wyantuti¹,

Pratomo²,

Anwar³

et al. 2020

Proceedings of the 1st International Conference on Islam, Science and Technology, ICONISTECH 2019, 11-12 July 2019, Bandung, In

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Section: ■ Introductionmentioning

confidence: 99%

“…The various by-product elements of REEs have enormous benefits both in the non-nuclear and nuclear fields [5][6][7][8]. For example in the non-nuclear field, REEs in the form of oxide plays a very important role in the needs of advanced materials such as superconductors, lasers, electronic optics, LED applications and iPAD [5, [8][9]. In terms of usefulness in the nuclear field, for example, Y2O3 has a very important benefit and role that can be used as a dopant of control rod made from hafnium or yttria-stabilized [2, [10][11] as well as a radiopharmaceutical for cancer therapy [9], Dy2O3 and Gd2O3 as control rod materials.…”

Section: ■ Introductionmentioning

confidence: 99%

Separation Factor of Y/Dy Emulsion on Membrane Process Using Nitric Acid and D2EHPA Solvent

Basuki

Pamungkas

2019

Indones. J. Chem.

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Liquid extraction of Y that containing Dy using bis-2-Ethylhexyl phosphoric acid (D2EHPA) extractant has been conducted. The purpose of this study is to determine the optimum parameter in a separation process that uses membrane emulsion. As the aqueous phase, a mixed solution of Y2O3 and Gd2O3 containing Y 10 g/L and Gd 250 mg/L was used. D2EHPA as extractant or organic phase with a variety of concentration was diluted with kerosene. Emulsifier Span-80 was used to make an emulsion of membrane liquid. The internal phase of the liquid membrane used 0.20–0.50 M nitric acid, and the external phase used 1–5 M nitric acid. The studied parameters were extractant concentration, stirring speed, stirring time, and the ratio of the internal and external phase. X-Ray Fluorescence (XRF) was used for the analysis of Y and Dy. The analysis of Y and Dy used the X-Ray Fluorescence (XRF). The optimization results of the extraction process of Y with emulsion membrane using D2EHPA extractants obtained the following conclusions: the optimum stirring rate was 8500 rpm, the D2EHPA concentration was 4.5% in kerosene, the internal concentration was 0.45 M nitric acid, the external concentration was 4 M nitric acid, the stirring time was 10 min that fixed stirring rate was 500 rpm, and the ratio of internal and external phase was 1:1. This conditions acquired a separation factor (SF) Y-Gd of 7.57.

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Towards the challenging REE exploration in Indonesia

Cited by 9 publications

References 6 publications

Mineralogi dan Mobilitas Unsur pada Lithium dan Logam Tanah Jarang pada Lumpur Sidoarjo (Lusi), Indonesia

Mineralogi dan Mobilitas Unsur pada Lithium dan Logam Tanah Jarang pada Lumpur Sidoarjo (Lusi), Indonesia

An experimental design approach for determination of rare earth elements as a complex with DTPA ligand by voltammetry method

Separation Factor of Y/Dy Emulsion on Membrane Process Using Nitric Acid and D2EHPA Solvent

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