Detection of rare earth elements in Powder River Basin sub-bituminous coal ash using laser-induced breakdown spectroscopy (LIBS)

Phuoc, Tran X.; Wang, Ping; McIntyre, Dustin

doi:10.1016/j.fuel.2015.09.034

Cited by 47 publications

(20 citation statements)

References 12 publications

(16 reference statements)

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“…9C) and 428 nm (Fig. 9D) are attributed to Ce 24 , confirming the presence of this specie within the coating structure.…”

Section: Strategy To Identify Ce Ions Within the Organicinorganic Hybsupporting

confidence: 59%

“…LIBS was also used to analyze the organicinorganic hybrid coatings without Ce 4+ ions and doped with 1500 ppm of Ce 4+ ions prepared in the same conditions of the other organic-inorganic hybrid coatings (subsection 2.2) and deposited onto copper substrate. This strategy was adopted, since iron from the substrate exhibits strong interference in the Ce analysis 24 . The spectra of the samples were acquired with a LIBS 2500plus spectrometer (Ocean Optics, Dunedin, FL, USA), which uses a Q-switched Nd:YAG laser at 1064 nm (Quantel, Bozeman, MT, USA) operating at 75 mJ maximum power energy, 8 ns pulse width, and 10 Hz frame rate.…”

Section: Laser-induced Breakdown Spectroscopy (Libs) Analysismentioning

confidence: 99%

“…Fig. 9 shows LIBS spectra for the coatings without and with 1500 ppm of Ce 4+ ions prepared in the same conditions as those previously reported (subsection 2.2) and deposited onto copper substrate to avoid the strong interference of iron in Ce analysis 24 . To improve the sensibility for Ce detection, one spectrum was obtained with a shearing system that increases the atomization process.…”

Section: Strategy To Identify Ce Ions Within the Organicinorganic Hybmentioning

confidence: 99%

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Influence of Ce(IV) ions amount on the electrochemical behavior of hybrid films in 0.1 mol L-1 NaCl solution

et al. 2019

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In this work, the influence of ceric ions (Ce(SO4)2) addition to the hydrolysis solution on the corrosion protection afforded by organic-inorganic hybrid coating obtained from tetraethoxysilane (TEOS) and 3-methacryloxy-propyl-trimethoxysilane (MPTS) to a carbon steel substrate in 0.1 mol L-1 NaCl solution was studied. Open circuit potential (EOC) and electrochemical impedance spectroscopy (EIS) experiments were carried out and showed that the protection afforded by the organic-inorganic hybrid coating was extremely dependent on the Ce4+ ions amount. These results were in close agreement with optical microscopy observation of the degrading surfaces, both procedures showing that more protective coating was produced when 500 ppm of Ce4+ ions were added to the organic-inorganic hybrid solution. The chemical state of the organic-inorganic hybrid coating investigated by X-ray photoelectron spectroscopy (XPS) indicated that the addition of Ce4+ ions enhances the polycondensation degree of the organic-inorganic hybrid coating leading to a denser siloxane (Si-O-Si) network. A strategy using laser-induced breakdown spectroscopy (LIBS) and UV-Vis spectrometry was set up in order to verify, respectively, the presence of Ce ions within the coating structure and its oxidation state. LIBS results confirmed the incorporation of Ce ions in the coating, which, according to UV-Vis measurements, are mainly in the (IV)-oxidation state.

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“…9C) and 428 nm (Fig. 9D) are attributed to Ce 24 , confirming the presence of this specie within the coating structure.…”

Section: Strategy To Identify Ce Ions Within the Organicinorganic Hybsupporting

confidence: 59%

Section: Laser-induced Breakdown Spectroscopy (Libs) Analysismentioning

confidence: 99%

Section: Strategy To Identify Ce Ions Within the Organicinorganic Hybmentioning

confidence: 99%

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Influence of Ce(IV) ions amount on the electrochemical behavior of hybrid films in 0.1 mol L-1 NaCl solution

et al. 2019

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“…The flotation was carried out in a laboratory flotation machine FL-240 for 5, 10, 15 minutes, at pH 7.5-8.5 in 0.5 increments, the ratio of organic and aqueous phases was (1÷20) -(1÷40). In the processes, isooctyl alcohol (2ethylhexanol, C8H18O) and sodium dodecyl sulfate (C12H25SO4Na) were used [14][15][16][17][18].…”

Section: Experimental Research Methodsmentioning

confidence: 99%

Rare Metals in Kuzbass Ash and Slag Wastes: Prospects of Extraction

Tatyana¹,

Elizaveta²,

Anastasia³

et al. 2018

Proceedings of the 9th China-Russia Symposium “Coal in the 21st Century: Mining, Intelligent Equipment and Environment Protecti

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Kuznetsk coal basin is one of the largest and most promising basins of the Russian Federation. Deposits of Kuzbass coal are complex ore-coal deposits, containing industrial concentrations of goal, platinum, rare metals in coals, waste coal and bottom ash waste, the extraction of which creates products with high additional coast. In this paper the composition of bottom ash waste (Kemerovo, Leninsk-Kuznetsk, Mezhdurechensk) and methods to extract valuable components from them and the main areas to use them are given. The incentives, allowing ash disposal areas of power plants to be put into production as quick as possible, because they can contain significant stocks of valuable rare, dispersed and rare-earth elements, are justified.

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“…However, this technique is not commonly available. For rapid detection and analysis of REEs, laser-induced breakdown spectroscopy (LIBS) has been applied for REE peak identifications in monazite sand and coal ash (Abedin et al 2011;Phuoc et al 2016). Bhatt et al (2017) have used this method to quantitatively analyze REEs in geological samples.…”

Section: Introductionmentioning

confidence: 99%

Using yttrium as an indicator to estimate total rare earth element concentration: a case study of anthracite-associated clays from northeastern Pennsylvania

Yang

Kozar

Gorski³

et al. 2020

Int J Coal Sci Technol

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This study demonstrated using yttrium (Y) as an indicator to estimate the total rare earth element and Y contents (REY) in coal-associated samples and to facilitate selection of samples with high REY assays in a fast and inexpensive manner. More than 10 anthracite-associated samples were collected from each of three Pennsylvanian sites (sites B, J and C) based on Thorium gamma ray logging suggesting high REY content. Several samples from each site were analyzed by ICP-MS to determine the rare earth distribution patterns and to establish the site-specific linear equations of Y and REY. The Y contents of the remaining samples were measured by a portable X-ray fluorescence analyzer, and the REY values were estimated based on the site-specific linear equation developed earlier. R-squared values above 0.70 were obtained for all the estimation equations from all three sites on both a whole sample basis and an ash basis. Previously, ash content has been widely used as an indicator of high REY content. This may not be applicable for a specific site. Site B in this study is an example where ash contents could not be statistically correlated with REY, so using Y for estimation is more applicable. The demonstrated sample screening process is suitable for samples from sites that share more similar distribution patterns (either MREY or LREY or HREY) as well as for samples from sites that share multiple distribution patterns (LREY/ MREY/HREY) depending on the desirable accuracy. The demonstrated process lowers the analytical cost from $70 to 80 dollars per sample to $10-15 per sample while significantly reducing the processing time and acid consumption for ICP digestion. This is particularly true when a relatively large sample size is involved, for example, 100 samples from one site analyzed by ICP-MS/OES.

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Detection of rare earth elements in Powder River Basin sub-bituminous coal ash using laser-induced breakdown spectroscopy (LIBS)

Cited by 47 publications

References 12 publications

Influence of Ce(IV) ions amount on the electrochemical behavior of hybrid films in 0.1 mol L-1 NaCl solution

Influence of Ce(IV) ions amount on the electrochemical behavior of hybrid films in 0.1 mol L-1 NaCl solution

Rare Metals in Kuzbass Ash and Slag Wastes: Prospects of Extraction

Using yttrium as an indicator to estimate total rare earth element concentration: a case study of anthracite-associated clays from northeastern Pennsylvania

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