Kinetics of Yttrium Dissolution from Alkaline Fusion on Zircon Tailings

Prameswara, Gyan; Trisnawati, Iga; Poernomo, Herry; Mulyono, Panut; Prasetya, Agus; Petrus, Himawan Tri Bayu Murti

doi:10.1007/s42461-020-00220-x

Cited by 10 publications

(10 citation statements)

References 34 publications

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“…The extracted tailings were byproducts of the magnetic separation process (Priyono and Febrianto, 2012). The zircon tailings used for this experimental purpose were the same sample used previously by our group to extract REMs (Prameswara et al, 2019(Prameswara et al, , 2020. The representative portions of the sample used for different tests were obtained by a cone-and-quartering method of sampling (Febriana et al, 2018).…”

Section: Materials and Sample Preparationmentioning

confidence: 99%

Sulfuric Acid Leaching of Heavy Rare Earth Elements (HREEs) from Indonesian Zircon Tailing

Trisnawati¹,

Prameswara²,

Mulyono³

et al. 2020

IJTech

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Solid pollution has been an issue in mineral processing for decade. One of these pollutants is zircon sand mining waste (zircon tailing). Due to the concentration of rare earth minerals in zircon tailing and the increasing demand of REE in advanced technologies, studying zircon tailing as a potential source of REE had become an interest for us. Our experiments consisted of mineral characterization and an alkaline fusion process, followed by a leaching process. The characterization process was carried out to obtain actual information from zircon tailing samples. This process showed total rare earth elements (REEs) content of 58.62%, at 9%, 1%, 1.2%, 1.7%, and 1.5% for Y, Gd, Er, Dy, and Yb, respectively. A sieving process was carried out since it was known that most heavy rare earth elements (HREEs) content occurs at a larger size. The alkaline fusion process was applied with an intent to break the phosphate bonds present in the REE-carrying minerals (xenotime and monazite) and convert phosphate bonds to hydroxide bonds in rare earth metals. During the alkaline fusion process, as much as 75%, 66.45%, and 60% of the phosphate, silica, and zirconium, respectively, were reduced. The leaching process was carried out in a flatbottom three-neck flask. The optimum point of leaching experiments occurs at 0.5 M H2SO4, 60°C, and a solid-to-liquid (S/L) ratio of 10 g/100 mL. In these conditions, as much as 89%, 99%, 94%, 92%, and 90% of Y, Gd, Er, Dy, and Yb, respectively, were recovered as an HREEs2-(SO4)3 product solution.

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Section: Materials and Sample Preparationmentioning

confidence: 99%

Sulfuric Acid Leaching of Heavy Rare Earth Elements (HREEs) from Indonesian Zircon Tailing

Trisnawati¹,

Prameswara²,

Mulyono³

et al. 2020

IJTech

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“…Produk alkali fusi yang tidak larut, yang diperoleh dari hasil pelindian sebelumnya menggunakan air terdiri dari natrium zirkonat, zirkon oksida terhidrasi, natrium silikat residu, asam silikat, sisa mineral zirkon yang merupakan reaksi antara mineral zirkon yang terdapat pada tailing magnetik dengan NaOH [17]. Sedangkan untuk mineral logam tanah jarang (monasit dan xenotim), produk alkali fusi yang tidak larut berupa logam tanah jarang hidroksida [18]- [19]. Untuk mineral titanium dalam bentuk rutil dan anatase, produk hasil alkali fusi yang tidak larut berupa natrium titanat [20]- [21].…”

Section: Pelindian Zirkoniumunclassified

“…Selain itu HCl lebih selektif terhadap senyawasenyawa lain hasil produk alkali fusi (Ti dan logam tanah jarang) dibandingkan dengan Zr. Dari penelitian Prameswara, dkk., [19], [26] pemungutan senyawa Ti dan logam tanah jarang memiliki kecenderungan meningkat dengan meningkatnya konsentrasi HCl.…”

Section: Pengaruh Konsentrasiunclassified

Pelindian Zirkonium Dari Tailing Magnetik Pasir Zirkon Hasil Roasting Menggunakan Naoh

Trisnawati

2020

metal.

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Tailing pertambangan adalah penyebab sebagian besar pencemaran lingkungan yang terkait dengan industri ekstraktif. Peningkatan risiko pencemaran lingkungan telah diamati di seluruh dunia karena sejumlah besar pengolahan bijih kadar rendah. Dalam penelitian ini, pemulihan zirkonium dari tailing magnetik pasir zirkon telah diselidiki. Tujuan dari studi ini adalah untuk mengetahui pengaruh kondisi operasi pencucian terhadap pemulihan zirkonium dari tailing magnetik pasir zirkon. Tailing magnetik pasir zirkon yang digunakan dalam penelitian ini diperoleh dari PT Monokem Surya. Awalnya, tailing magnetik pasir zirkon dipanggang dengan tujuan memisahkan senyawa zirkonium dan silikat sebagai pengotor. Proses pemanggangan telah dilakukan dengan mereaksikan tailing magnetik zirkon pasir dan NaOH dengan perbandingan 1: 1 pada 450 °C selama 3 jam. Produk tersebut kemudian dicuci, dikeringkan dan dilindi menggunakan larutan HCl dan H2SO4. Untuk mengetahui kinerja pelindian, kondisi operasi bervariasi termasuk suhu (30 °C-110 °C), konsentrasi asam (0,125M-2M) dan rasio padat terhadap cair (0,05 g/mL-0,25 g/mL). Ditemukan bahwa pemulihan zirkonium mencapai optimal ketika proses pelindian menggunakan 0,5 M HCl dan H2SO4. Menggunakan kondisi ini, pemulihan 88% dan 26% diperoleh untuk zirkonium menggunakan HCl dan H2SO4, masing-masing.

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“…From these results, the optimum conditions for the alkaline fusion zircon tailings leaching process were obtained at a temperature of 60 °C, HCl concentration of 1 M, and a ratio of yield of the alkaline fusion: HCl is 1:10 for 7.5 min. Y recovery reached 87%, and the activation energy value (E a ) was 20.21 kJ/mol [20].…”

Section: ■ Introductionmentioning

confidence: 99%

Kinetics Study of Yttrium Leaching from Zircon Tailings Using Sulfuric Acid

Supriadi¹,

Trisnawati

Handini³

et al. 2023

Indones. J. Chem.

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From the analysis of zircon tailings using X-Ray Fluorescence (XRF), Yttrium is a rare earth element (REE) with the highest concentration compared to other REEs. The purpose of this study is to determine the best kinetic model for describing how sulfuric acid extracts Yttrium from zircon tailings. Leaching temperatures of 200, 250, and 300 °C were used to determine the kinetics. Samples were obtained at 0, 20, 40, 60, 80, 100, and 120 min for each temperature. This study discovered that the chemical reaction model's kinetics are the most closely related to those of the leaching process. The evaluation of the model utilizing the coefficient of determination (R2) on the relationship between each model and time lends support to this conclusion. The activation energy (Ea) of the leaching process is determined by the Arrhenius plot between ln k and 1/T. In the Yttrium leaching procedure, the Ea value is 14.42 kJ/mol. The chemical reaction model was in charge of the leaching process, according to the Ea value. The premise of the chemical reaction model is that chemical reactions regulate the rate of the reaction.

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Kinetics of Yttrium Dissolution from Alkaline Fusion on Zircon Tailings

Cited by 10 publications

References 34 publications

Sulfuric Acid Leaching of Heavy Rare Earth Elements (HREEs) from Indonesian Zircon Tailing

Sulfuric Acid Leaching of Heavy Rare Earth Elements (HREEs) from Indonesian Zircon Tailing

Pelindian Zirkonium Dari Tailing Magnetik Pasir Zirkon Hasil Roasting Menggunakan Naoh

Kinetics Study of Yttrium Leaching from Zircon Tailings Using Sulfuric Acid

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