A cost-effective process for recovering thorium and rare earths from radioactive residues

Su, Jia; Xu, Riwei; Ni, Shuainan; Li, Fujian; Sun, Xiaoqi

doi:10.1016/j.jclepro.2019.119931

Cited by 16 publications

(7 citation statements)

References 22 publications

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“…In this study, we have higlighted some important works of different researchers on exraction and separation of thorium from other metals. The parameters studied in the above said processes are calculated by using the following relations (65,73,83). (3)…”

Section: Extraction and Separation Results With The Optimal Conditional Analysismentioning

confidence: 99%

“…Bastnasite leaching can be used, in which purities of Th were increased by 98%. Due to the increasing global demand of energy, the recovery of Th, and U from various sources have drawn great attention at present time (64,65). Bastnasite ((RE)(CO3) F), monazite((RE(PO4), xenotime (YPO4), and RE-bearing clay have been used as rare earth minerals (65,66).…”

Section: Recovery Of Thorium(iv) By α-Amino Phosphate Extractant In Sulfate Medium and From Leach Solution With Cextrant 230mentioning

confidence: 99%

“…Due to the increasing global demand of energy, the recovery of Th, and U from various sources have drawn great attention at present time (64,65). Bastnasite ((RE)(CO3) F), monazite((RE(PO4), xenotime (YPO4), and RE-bearing clay have been used as rare earth minerals (65,66). Recently, aminophosphate compounds have drawn the attraction of researchers, and have been extensively used as extractants, herbicides, anticancer agents, etc.…”

Section: Recovery Of Thorium(iv) By α-Amino Phosphate Extractant In Sulfate Medium and From Leach Solution With Cextrant 230mentioning

confidence: 99%

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A Survey on Various Methods of Extraction and Recovery of Thorium

Dash

Hial

Senapati

et al. 2021

Journal of the Turkish Chemical Society Section A: Chemistry

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In this survey, some methods of extraction of thorium such as selective extraction of thorium using phosphorodiamidate, selective cloud point extraction of thorium, extraction of thorium from sulfuric acid baking and leaching of monazite, extraction of thorium from chloride solution using Schiff base were discussed. The decomposition of monazite was manifested by sulfuric acid baking and leaching at an elated temperature. The recovery of thorium (Th) from various sources of rare earth and some selective extraction of thorium by using phosphorodiamidate as an extractant was also reported. Using a special synthesized surface-active ionic liquid extractant (SAIL), the cloud point extraction of thorium was analyzed. A synthesized Schiff base was applied for the extraction of thorium in the strategic solvent extraction method. Thorium, using α-amino phosphate extractant from bastnaesite, recovered by using Cyanex 572 and N1923, recovery of Th from industrial residues and recovery of Th from radioactive waste by using IREPO and monazite leached solution were discussed. In this study, the recovery of thorium from the industrial residue as well as from radioactive residue was also discussed.

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Section: Extraction and Separation Results With The Optimal Conditional Analysismentioning

confidence: 99%

Section: Recovery Of Thorium(iv) By α-Amino Phosphate Extractant In Sulfate Medium and From Leach Solution With Cextrant 230mentioning

confidence: 99%

Section: Recovery Of Thorium(iv) By α-Amino Phosphate Extractant In Sulfate Medium and From Leach Solution With Cextrant 230mentioning

confidence: 99%

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A Survey on Various Methods of Extraction and Recovery of Thorium

Dash

Hial

Senapati

et al. 2021

Journal of the Turkish Chemical Society Section A: Chemistry

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“…Rare earth elements (REEs), as a strategic resource, have drawn great attention due to their significant applications in high-tech fields. − Ion-adsorption rare earths ore (IREO) contributes approximately 80% to the global supply of REEs resources . As associated natural radioactive elements, such as uranium (U) and Thorium (Th), their enrichment , in IREO residues is followed throughout the production process of IREO. , As reported, the total radionuclide activity of IREO residues was approximately 5–300 Bq/g, which was higher than the exemption level (>1 Bq/g, GB 27742-2011) and belonged to low-level radioactive waste (<400 Bq/g, GB 02013-2017), named as ion-adsorption rare earth elements low-level radioactive residues (IREEs-LRR), leading to an increased risk of environmental pollution and health hazards. , …”

Section: Introductionmentioning

confidence: 98%

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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“…In particular, the discharge of untreated industrial wastewater into the soil, lakes and rivers has caused a lot of pollution, affecting the environment on which humans depend. 9 While rare earth elements cause environmental pollution, they will also produce toxicological effects by entering the human body through the food chain and affecting human health. The sewage discharged by some mining and beneficiation enterprises usually contains high concentrations of lanthanum.…”

Section: Introductionmentioning

confidence: 99%

Effective and selective adsorption of La³⁺ by a poly-N-isopropylacrylamide phosphoric modified cellulose aerogel

Zheng

Hua

et al. 2022

New J. Chem.

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A cost-effective process for recovering thorium and rare earths from radioactive residues

Cited by 16 publications

References 22 publications

A Survey on Various Methods of Extraction and Recovery of Thorium

A Survey on Various Methods of Extraction and Recovery of Thorium

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

Effective and selective adsorption of La³⁺ by a poly-N-isopropylacrylamide phosphoric modified cellulose aerogel

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A cost-effective process for recovering thorium and rare earths from radioactive residues

Cited by 16 publications

References 22 publications

A Survey on Various Methods of Extraction and Recovery of Thorium

A Survey on Various Methods of Extraction and Recovery of Thorium

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

Effective and selective adsorption of La3+ by a poly-N-isopropylacrylamide phosphoric modified cellulose aerogel

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Effective and selective adsorption of La³⁺ by a poly-N-isopropylacrylamide phosphoric modified cellulose aerogel