Europium separation from a middle rare earths concentrate derived from Egyptian black sand monazite

Rabie, K.A.; Sayed, S.A.; Lasheen, T.A.; Salama, Ibrahim E.

doi:10.1016/j.hydromet.2006.10.007

Cited by 33 publications

(7 citation statements)

References 23 publications

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“…There are many techniques dedicated to determination of rare earth elements. INAA, [80][81][82][83][84][85][86][87] RNAA, 88,89 XRF, [90][91][92][93] ICP-OES, 63,88,[94][95][96][97][98] ICP-MS, 63,84,95,[99][100][101][102][103][104][105][106] and UV-VIS 94,[107][108][109] are the most frequently employed analytical techniques for determination of REE in geological materials. Although ICP-MS and NAA are the most suitable techniques for determination of REE, which possess the ability to detect trace elements at sub-mg L À1 levels, they suffer from problems of ionization suppression by matrix elements, isobaric polyatomic interferences and clogging of the sample introduction system when the sample contains a high concentration of dissolved salts.…”

Section: Geological Materialsmentioning

confidence: 99%

“…Although, spectrophotometry was used to determine europium after its separation from a middle rare earth concentrate. 109 The separation method consists of the reduction of europium by metallic zinc to oxidation state II followed by selective precipitation of the sparingly soluble europium(II) tetraoxosulfate, while leaving the other rare earth tetraoxosulfates in solution. The analysis of the individual rare earth elements has been carried out using a combined IC-UV-VIS instrument.…”

Section: Sand and Coalmentioning

confidence: 99%

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Determination of rare earth elements by spectroscopic techniques: a review

Zawisza

Pytlakowska

Feist

et al. 2011

J. Anal. At. Spectrom.

184

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An overview of publications focussed on the period since 2000 and outlining modern methods of sample preparation as well as advanced techniques for determination of rare earth elements (REE) in various matrices is presented in this paper. The review discusses the problems of REE determination in diverse samples i.e. from biological through environmental and geological to advanced materials. The preferable procedure of sample digestion and the most frequently applied methods of sample preparation for determination of trace elements are discussed in this paper. The case of direct analysis of samples for REE determination is also discussed. The review outlines determination of REE employing many techniques such as, inter alia, flame or graphite furnace atomic absorption spectrometry, atomic absorption with chemical vapor generation, X-ray fluorescence spectrometry, inductively coupled plasma optical emission spectrometry, inductively coupled plasma mass spectrometry and neutron activation analysis. This article summarizes and classifies materials in which rare earth elements are present, main places of their occurrence and the methods of their analysis.

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Section: Geological Materialsmentioning

confidence: 99%

Section: Sand and Coalmentioning

confidence: 99%

Determination of rare earth elements by spectroscopic techniques: a review

Zawisza

Pytlakowska

Feist

et al. 2011

J. Anal. At. Spectrom.

184

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“…0.05-0.10% w/w in its ores i.e. monazite and bastnaesite [1][2][3]. Its use is increasing day by day.…”

Section: Introductionmentioning

confidence: 99%

Liquid–liquid extraction of Eu(lll) using synergic mixture of 1-phenyl-3-methyl-4-trifluoroacetyl-2-pyrazolin-5-one and crown ethers

Ghani

Shahida²,

Ali

et al. 2020

SN Appl. Sci.

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Synergic extraction of Eu(III) as representative of rare earth elements was conducted with 0.01 mol dm −3 of trifluoroacetylpyrazolin-5-one (HPMTFP) and then with synergic mixture of HPMTFP and crown ethers (benzo-15-crown-5, 18-crown-6, 15-crown-5) in dichloromethane (DCM) from aqueous solution having pH 1.0-3.5. Slope analysis method was used for determining the composition of the synergic adduct i.e. Eu(PMTFP) 3 that came out to be Eu(PMTFP) 3 •2S, where S = neutral oxo-donor and -PMTFP = conjugate base of HPMTFP molecule. Selective extraction of Eu(III) was found in the presence of various masking agents like citrate, oxalate, bromide, thiosulphate, chromate ions and of some cations. The accuracy of the developed procedure was checked by analyzing real lake sample (IAEA-SL-3) as a reference material.

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“…Efficient removal of REEs by these microbes from their solution depends on the quantity of REEs remaining in the supernatant. The REE quantification of supernatants has been traditionally accomplished using absorption spectroscopy (ultraviolet–visible spectrophotometry; UV–vis), emission spectroscopy, inductively coupled plasma mass spectrometry (ICP–MS), − inductively coupled plasma optical emission spectrometry, , X-ray fluorescence, laser-induced breakdown spectroscopy, − and electronic tongue system . Amongst these methods, ICP–MS is the most commonly used technique for all type of REEs especially if they are in water and sediments due to various advantages, including favorable detection limits, high throughput, simultaneous measurement of more than one element, and its ability to provide elemental isotopic ratio information as well as its large linear dynamic working range .…”

Section: Introductionmentioning

confidence: 99%

Utilization of Dielectrophoresis for the Quantification of Rare Earth Elements Adsorbed on Cupriavidus necator

Adekanmbi

Giduthuri

Waymire

et al. 2019

ACS Sustainable Chem. Eng.

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A new method of quantifying rare earth elements (REEs): light REEs (neodymiumNd 3+ and samariumSm 3+ ) and heavy REE (europiumEu 3+ ) was investigated by utilizing native Cupriavidus necator as the biosorbent and dielectrophoresis as the quantification technique.C. necator was characterized as a control through the measurement of the first and second crossover frequencies in a polymer-based (PDMS) point-andplanar microwell platform at 8 V pp (peak-to-peak voltage) ac signal and variable frequencies. Allied C. necator in its metal-bound state was then characterized for each of the REEs adsorbed. The first crossover frequency (f co1 ) was correlated with the amount of metal adsorbed that was obtained through spectrophotometry. The influence of pH, biosorbent dosage, initial REE concentration, and REE incubation period was further investigated to study the effects of those on the biosorption process. It was found that the amount of metal biosorbed by the C. necator is directly proportional to the biosorbent dosage and metal incubation period. Exposure to higher REE concentration solutions resulted in higher biosorption, and higher pH of REE solutions (towards neutral range) resulted in abnormal behavior due to the formation of complex salts. The results obtained here, that is, the crossover frequency versus concentration curve would serve as a baseline for other researchers, such that when the crossover frequency of a biosorbent with a particular REE is known, the quantity of that particular REE adsorbed can be correlated without the need of expensive spectrophotometric analysis.

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Europium separation from a middle rare earths concentrate derived from Egyptian black sand monazite

Cited by 33 publications

References 23 publications

Determination of rare earth elements by spectroscopic techniques: a review

Determination of rare earth elements by spectroscopic techniques: a review

Liquid–liquid extraction of Eu(lll) using synergic mixture of 1-phenyl-3-methyl-4-trifluoroacetyl-2-pyrazolin-5-one and crown ethers

Utilization of Dielectrophoresis for the Quantification of Rare Earth Elements Adsorbed on Cupriavidus necator

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