Recovery of uranium, thorium and rare earth from industrial residues

Amaral, Janúbia C.B.S.; Sá, Michelle L.C.G.; Morais, Carlos A.

doi:10.1016/j.hydromet.2018.09.009

Cited by 19 publications

(6 citation statements)

References 9 publications

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“…Chemical and biological leaching methods, followed by solvent extraction or alkali smelting, are used to achieve substantial recovery of these metals from secondary sources (Maslov et al, 2010;Santos and Ladeira, 2011;Amaral et al, 2018;Dinal et al, 2019;Jyothi et al, 2020;Ahmed et al, 2021). The methods used for REE recycling of used electronic devices Brückner et al (2020) Frontiers in Environmental Science frontiersin.org also include crushing and grinding the devices into powder form, from which the essential components are extracted by further separating the elements using pyrometallurgical methods (Jowitt et al, 2018).…”

Section: Figurementioning

confidence: 99%

“…While primary U, Th, and REE resources currently account for the majority of industrial production and use, secondary resources are becoming increasingly important from an environmental and resource conservation perspective (Amaral et al, 2018). Since these elements often occur in the same mineral assemblages and source rocks (Rhodes, 2011;Jonathan, 2012;Goodenough et al, 2016;Ramos et al, 2016;Schulz et al, 2017), e.g., uraniferous phosphates processed by the fertilizer industry or monazite processed to extract REEs (Barthel and Tulsidas, 2014;Suli et al, 2017), the residues of the above processes are the most obvious target.…”

Section: Introductionmentioning

confidence: 99%

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Occurrence of uranium, thorium and rare earth elements in the environment: A review

Patel

Sharma²,

Maity

et al. 2023

Front. Environ. Sci.

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Uranium, thorium, and rare earth elements (REEs) are important strategic elements in today’s world with a range of applications in high and green technology and power generation. The expected increase in demand for U, Th, and REEs in the coming decades also raises a number of questions about their supply risks and potential environmental impacts. This review provides an overview of the current literature on the distribution of these elements in different environmental compartments. For example, the processes of extraction, use, and disposal of U-, Th-, and REE-containing materials have been reported to result in elevated concentrations of these elements in air, in some places even exceeding permissible limits. In natural waters, the above processes resulted in concentrations as high as 69.2, 2.5, and 24.8 mg L−1 for U, Th, and REE, respectively, while in soils and sediments they sometimes reach 542, 75, and 56.5 g kg−1, respectively. While plants generally only take up small amounts of U, Th, and REE, some are known to be hyperaccumulators, containing up to 3.5 and 13.0 g kg−1 of U and REE, respectively. It appears that further research is needed to fully comprehend the fate and toxicological effects of U, Th, and REEs. Moreover, more emphasis should be placed on developing alternative methods and technologies for recovery of these elements from industrial and mining wastes.

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Section: Figurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Occurrence of uranium, thorium and rare earth elements in the environment: A review

Patel

Sharma²,

Maity

et al. 2023

Front. Environ. Sci.

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“…Technologies to recover uranium, thorium and REE from various industrial wastes are described in review [26].…”

Section: Other Kinds Of Wastementioning

confidence: 99%

“…Experience of obtaining REE concentrate from highly active waste of factory RT-1 is described in the work [26]. Waste contained uranium, aluminum and REE.…”

Section: Other Kinds Of Wastementioning

confidence: 99%

Вторичное Сырье Радиоактивных Металлов

Колобов¹,

Кириченко²,

Личконенко³

et al. 2019

Problems of Atomic Science and Technology

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Приведены основные виды вторичного сырья радиоактивных металлов. Рассмотрены технологии пере-работки отработанного ядерного топлива и некоторых видов отходов атомного производства, включая про-цессы получения из них радионуклида молибден-99.

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“… Generally, two tons of IREEs-LRR are produced for each ton of IREO, , which mainly contained aluminum-containing compounds (∼25 wt % Al 2 O 3 ), a small amount of REEs (∼1 wt % REO), and the associated radioactive elements such as uranium (∼0.05 wt % U ) and trace of Th. To date, the disposal of IREEs-LRR has focused on the acid process ,− including the use of different acids to dissolve IREEs-LRR, and then the addition of different extractants to separate REEs and radioactive elements such as U and Th. , For instance, the disposal of IREEs-LRR with H 2 SO 4 , HCl, or HNO 3 have leaching yields for REEs of 94%–98%, Th of 97%, and U of 81%, , respectively. However, the acid method not only failed in reduction emission but encountered difficulties in solid–liquid separation and high loss yields of REEs, − due to the dissolution of aluminum-containing compounds and the separation of REEs, Al(III), and U in the acid leaching solutions. , Therefore, it is necessary to develop new methods to dispose of IREEs-LRR, thereby reducing residual emissions and utilizing the valuable metals.…”

Section: Introductionmentioning

confidence: 99%

Disposal Strategy of Ion-Adsorption Rare Earth Elements Low-Level Radioactive Residues: Reduction Emission and Recovery for Aluminum and Uranium by Alkaline and Alkalescent Media

Chang,

Li,

Han

et al. 2024

ACS Sustainable Resour. Manage.

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Hindered by the separation among radioactive elements, aluminum (Al), and rare earth elements (REEs), acid methods encounter persistent obstacles in reduction emission of ion-adsorption rare earth elements low-level radioactive residues (IREEs-LRR). This work reported a stepwise strategy for the reduction of emission and recovery of Al and uranium (U) from IREEs-LRR by alkaline and alkalescent media. As one of the main phases, Al(III)-containing compounds of IREEs-LRR were first converted into soluble NaAl(OH) 4 with NaOH solution at ordinary pressure. Na 2 U 2 O 7 and the adsorbed state U(VI), as detected by speciation, were then transformed into soluble uranyl carbonate in a Na 2 CO 3 -NaCit solution. The total removal yields of Al and U approached 97 and 94 wt %, respectively, engendering an 84 wt % loss weight of IREEs-LRR. Additionally, the REEs content in the residues increased from 0.88 to 3.6 wt %, while the specific activity of U decreased from 5.6 to 1.9 Bq/g. The mechanism was related to the NaOH-mediated dissociation of Al(III) polymeric complexes coupled with the enhanced dissolving capacity of uranium (U(VI)) complexes in alkalescent medium. This paper provides a novel strategy for reducing residual radioactivity, enriching REEs, and recovering valuable Al and U from IREEs-LRR.

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Recovery of uranium, thorium and rare earth from industrial residues

Cited by 19 publications

References 9 publications

Occurrence of uranium, thorium and rare earth elements in the environment: A review

Occurrence of uranium, thorium and rare earth elements in the environment: A review

Вторичное Сырье Радиоактивных Металлов

Disposal Strategy of Ion-Adsorption Rare Earth Elements Low-Level Radioactive Residues: Reduction Emission and Recovery for Aluminum and Uranium by Alkaline and Alkalescent Media

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