The production of rare earth elements group via tributyl phosphate extraction and precipitation stripping using oxalic acid

Jorjani, E.; Shahbazi, Malek

doi:10.1016/j.arabjc.2012.04.002

Cited by 89 publications

(41 citation statements)

References 18 publications

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“…Elements Ce and Eu can also be present in oxidation states B+4^and B+2,^respectively [7,13]. The REE are soft elements, malleable, ductile, and considered great electrical conductors, which allow their application in several industrial segments of high technology, such as automotive, nuclear, petroleum, electronic, military, metallurgical, and renewable energy [14][15][16][17]. REE can also be applied in studies of pedogenic processes, as tracers in geochemical studies [18,19], and in agricultural fertilizers [20].…”

Section: Characteristics and Uses Of Reementioning

confidence: 99%

Rare Earth Elements in the Soil Environment

et al. 2016

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Rare earth elements (REE) are a homogenous group of 17 chemical elements in the periodic table that are key to many modern industries including chemicals, consumer electronics, clean energy, transportation, health care, aviation, and defense. Moreover, in recent years, they have been used in agriculture. One of the consequences of their worldwide use is the possible increase of their levels in various environmental compartments. This review addresses major topics concerning the study of REE in the soil environment, with special attention to the latest research findings. The main sources of REE to soils, the contents of REE in soils worldwide, and relevant information on the effects of REE to plants were explored. Ecological and human health risk issues related to the presence of REE in soils were also discussed. Although several findings reported positive effects of REE on plant growth, many questions about their biological role remain unanswered. Therefore, studies concerning the actual mechanism of action of these elements on cellular and physiological processes should be further refined. Even more urgent is to unveil their chemical behavior in soils and the ecological and human health risks that might be associated with the widespread use of REE in our modern society.

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Section: Characteristics and Uses Of Reementioning

confidence: 99%

Rare Earth Elements in the Soil Environment

et al. 2016

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“…Исследования показали, что при использовании различных концен-траций раствора ТБФ в керосине (от 0,73 до 3,65 моль·л -1 ) наблюдалось увеличение значения коэффициен-та извлечения до концентрации ТБФ 3,65 моль·л -1 [36]. При изучении экстракции кати-онов РЗМ органофосфорными экс-трагентами исследователи уделяют внимание синергетическому эффекту.…”

Section: экстракция лантанидов органофосфорными экстрагентамиunclassified

“…Studies have shown that using different concentrations of solution of TBP in kerosene (from 0.73 to 3.65 mol·l -1 ), an increase in the rate of extraction factor to TBP concentration of 3.65 mol·l -1 was observed [36].…”

Section: Extraction Of Lanthanides By Organophosphorous Extractantsmentioning

confidence: 99%

Extractants for rare earth metals

2016

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The separation of trivalent rare earth metals is perhaps the most serious challenge associated with a closed fuel cycle. The choice of ligand as extractant, which must be selective and efficient in conditions of high radiation environment, plays an important role. In this review there are the main examples of extractants for f-elements used in the present 10-20 years. Экстрагенты для редкоземельных металловРазделение трехвалентных редкоземельных металлов, возможно, является самым се-рьезным вызовом, связанным с замкнутым топливным циклом. Важную роль играет выбор лиганда в качестве экстрагента, который должен быть селективным и надежным в условиях повышенной радиации среды. В данном обзоре приведены основные примеры экстрагентов для f-элементов, применяющихся в последнии 10-20 лет.Ключевые слова: редкоземельные металлы; фосфорорганические соединения; краунэ-фиры; поданды; каликсарены; амиды дигликолевой кислоты.

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“…Extraction becomes a very useful tool when choosing a suitable solvent [11][12][13][14][15]. The rare earth solutions were prepared by the dissolution of the peroxycarbonate precipitate of Dy, Gd, and traces of Yb with HCl.…”

Section: Extraction Experimentsmentioning

confidence: 99%

“…Yttrium and dysprosium is separated via solvent extraction technique from different acid media using different solvents such as Cyanex 923, bis (2, 4, 4-trimethylpentyl) dithiophosphinic acid, sec-octylphenoxy acetic acid [CA12] synergtic with bis (2, 4-4-trimethylpentyl) phosphinic acid [Cyanex 272], and trialkyl phosphine oxide (TPO) [11][12][13][14][15]. Mohammadi et al (2015) studied the separation of Dy, Nd, and Y by solvent extraction using D2EHPA and EHEHPA.…”

Section: Introductionmentioning

confidence: 99%