Rare earth element and yttrium content of coal in the Banko coalfield, South Sumatra Basin, Indonesia: Contributions from tonstein layers

Anggara, Ferian; Amijaya, Donatus Hendra; Harijoko, Agung; Tambaria, Theodora Noely; Sahri, Amanda Ayudia; Nur, Z.A. Shajaratun

doi:10.1016/j.coal.2018.07.006

Cited by 30 publications

(11 citation statements)

References 25 publications

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“…The Tanjung Formation deposited overlaying of Late Cretaceous Kasale Vulcanic as a basement that mostly comprised of pyroxene basalt. The A study of REY enrichment in coal in Indonesia has been done in Banko coalfield, Tanjung Enim, South Sumatra [6]. One of the samples, from Banko Coalfiled has a total of REY elements of around 118.4 ppm, and this concentration is higher than World Hard Coal, World Low Rank Coal, World Coal, and US Coal.…”

Section: Resultsmentioning

confidence: 99%

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Occurrence of rare earth element and yttrium (REY) in Tanjung formation coking coal from Sekako area, Central Kalimantan

2020

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Inorganic geochemistry of coal become a point of interest on coal study, especially relating with the occurrence of rare earth element. Tanjung Formation is one of coking coal bearing deposits in Barito Basin, Central Kalimantan. The aims of this study to determine the occurrence of Rare Earth Element and Yttrium (REY) especially in term of concentration and enrichment type in coal seam A and B of Tanjung Formation in Sekako Area, Central Kalimantan. A number of 10 coal samples were collected from both seams. Inductively Coupled Plasma-Atomic Spectroscopy (ICP-AES) analysis was conducted to determine the REY in coal. Based on this study, coal seam A and B generally have very low concentration of REY elements deposits. The REY elements of coal seam A and B in the study area are typically characterized with M and H-type enrichment, which might be caused by the mafic basalt rocks in the surroundings.

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Section: Resultsmentioning

confidence: 99%

“…Fly or bottom ash is a by-product of the coal combustion process as steam coal for electricity generation. Recent study on fly or bottom ash from Indonesia power plants, indicated that REY concentration in the coal ash is about 10 times higher than in the raw coal [6].…”

Section: Introductionmentioning

confidence: 99%

Occurrence of rare earth element and yttrium (REY) in Tanjung formation coking coal from Sekako area, Central Kalimantan

2020

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“…Karakterisasi XRD adalah Salah satu cara yang dipakai untuk memastikan struktur suatu padatan kristalin yaitu metode serbuk difraksi sinar-X (Xray powder diffraction) (Anggara et al, 2018). Pengujian X-Ray Diffraction dilakukan di BATAN (Badan Tenaga Nuklir Nasional) berbentuk serbuk sebanyak 1 gram dengan ukuran 230 mesh.…”

Section: Karakterisasi X-ray Diffractionunclassified

Pengaruh Variasi Campuran Bentonit Terhadap Karakteristik Pasir Cetak Untuk Proses Sand Casting

Shieddieque¹,

Nugraha²,

Muttahar³

et al. 2022

Rekayasa

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The casting process is widely used because it has the advantage of being able to make products with small dimensions to very large dimensions, the use of materials is more efficient, the casting products can be directly used. However, in the casting process, the main triggers for the formation of defects are the nature of the mold, low permeability, low molding compressive strength, low sintering point, unsuitable sand grain distribution, so research is needed to obtain the right type of molding sand as a sand mold in metal casting. The only type of additive is bentonite. Bentonite can absorb water and expands between 8-15 times and remains dispersed in water for a certain period of time. This study aims to examine the effect of a mixture of variations of local bentonite and Australian bentonite on the characteristics of the molding sand for the sand casting process. The tests carried out are in the form of size distribution testing, X-Ray Diffraction, water content testing, compressive strength, and permeability measurements. Bentonite was varied into 5 variations of the mixture with a difference of 20% in each mixture. The results of the large size distribution of silica sand grains were 37.6 GFN. The results of XRD testing of local bentonite showed a higher content of calcium compounds and Australian bentonite contained higher sodium compounds. The largest water content test value is 5.825%. The largest compressive strength test value is 2.7 Kgf /cm 2 .

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“…The presence of tonstein layer in the fire coal seam is correlated to higher levels of REEs in the coal samples. 8 The genetic types and chemical nature of REEs cause the fractionation of REEs in the coal seam. 9,10 The heavy REEs (HREEs) including Eu, Tb, Gd, Y, Lu, Dy, Tm, Ho, and Er are reported to be present at high concentration in the coals with low ash content, whereas their concentrations are low in the coals with high ash content.…”

Section: Introductionmentioning

confidence: 99%

Bio-weathering Using Shewanella oneidensis MR-1 Enhances Selective Recovery of Rare Earth Elements from Alaskan Coal Mines

Sachan

Dev

Briggs

et al. 2022

Preprint

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Coal mines in Alaska with high rare earth elements (REEs) levels (286-524 mg/kg) serve as an alternative domestic source for REEs. Existing leaching/separation technologies fail to selectively recover REEs from the feedstock and require downstream multiple purification stages that increase the overall operational cost. This study aims at bio-weathering coal from two Alaskan coal mines (Wishbone Hill and Healy) at three density fractions (1.3 float, and 1.3 and 1.5 sink) using Shewanella oneidensis MR-1 for achieving higher selective REEs recovery in one-step process. Optimizing the bio-weathering process by varying solids percentages (5.7 to14.3% w/v), particle size (-14 to -200 M), incubation temperatures (30 to 34 °C), and inoculum dosing (0.2 to 1% v/v) resulted in highest recovery of Neodymium (75.3%) and total REEs (98.4%) from 1.3 float Wishbone Hill and 1.3 sink Healy coal, respectively. When compared to the chemical leaching process, bio-weathering enhanced selective recovery of REEs including Scandium, Yttrium, Ytterbium, Terbium, Erbium, and Lutetium from Healy coal at low density, and Yttrium from Wishbone Hill coal at high density. The results indicate the future scope for developing cost-effective selective REEs recovery processes that may address the global critical minerals supply chain risk.

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Rare earth element and yttrium content of coal in the Banko coalfield, South Sumatra Basin, Indonesia: Contributions from tonstein layers

Cited by 30 publications

References 25 publications

Occurrence of rare earth element and yttrium (REY) in Tanjung formation coking coal from Sekako area, Central Kalimantan

Occurrence of rare earth element and yttrium (REY) in Tanjung formation coking coal from Sekako area, Central Kalimantan

Pengaruh Variasi Campuran Bentonit Terhadap Karakteristik Pasir Cetak Untuk Proses Sand Casting

Bio-weathering Using Shewanella oneidensis MR-1 Enhances Selective Recovery of Rare Earth Elements from Alaskan Coal Mines

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