The solid phase materials or sorbents applied to the removal of uranium from industrial waste streams and surface waters are reviewed. The speciation of the element in the …
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The hydrated manganese dioxide (HMO) was synthesized by hydrothermal process using MnSO4 and KMnO4. The adsorption of HMO for Th(IV) and U(VI) were investigated by batch static adsorption experiments. The HMO and MnO2 were characterized by FT-IR, XRD and SEM. At the same time, the adsorption mechanism is discussed. The …
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To investigate the leaching rules and mechanism of a hard rock uranium ore, this paper conducted conventional leaching experiments based on the chemical composition and mineral occurrence status of the ore. Various factors affecting leaching were explored, and experimental data were fitted using the shrinking-core model. The results showed …
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The ED process decreased the chloride content from 22 g/L to 6 g/L. Finally, static and dynamic load tests were performed for both the original PLS and the treated PLS, using 3 different anion-exchange resins: Dowex-1, Lewatit A365 and Lewatit MP62-WS. The loading capacity of the ion-exchange resins was increased 4 times approximately.
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The recovery of uranium from nuclear industrial effluent has been studied using laboratory column and polymeric ion exchange resin.The industrial effluent, at pH around 10, contains uranium (40 mg/L), ammonium (80 g/L) and carbonate (170 g/L) and cannot be discharged without previous treatment. Uranium is in the form of uranyl …
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The solid phase materials or sorbents applied to the removal of uranium from industrial waste streams and surface waters are reviewed. The speciation of the element in the environment is discussed. A series of examples on uranium remediation from the recent literature using the different kinds of solid phase sorbents are reviewed in detail and …
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At low initial uranium concentration, the uranium removal percentage on the composite exceeded 99.7 % and the residual concentration of uranium in the solution …
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The efficient removal of radionuclide uranium is crucial for sustainable nuclear energy and achieving a zero-carbon loop. In this study, we synthesized MXene/MnO2 nanocomposites and evaluated their ability …
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Stable metals removal. The AG ® MP-1M anion exchange column cycling process was continued to remove all other impurities and any trace plutonium. The feed was loaded with ≥ 8 M HNO 3 (up to a maximum of 10 M HNO 3) to increase the affinity of uranium to the AG ® MP-1M resin and allow M 2+ and M + impurities to pass through …
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In this study, the removal of Sr was investigated using the zeolite produced from the Bayer process liquids. Based on the XRD, SEM/EDS analysis, the product was pure and highly crystalline zeolite ...
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Ion flotation is a separation process that removes metal ions from solution using air bubbles and surfactants (Sebba, 1959), and it has potential to be a simple, environmentally-friendly remediation strategy for uranium-contaminated waters (Mahmoud and Othman, 2018; Shakir, 2007; Shakir and Samy, 1980). The basis of the ion flotation …
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For this reason, uranium must be extracted from the copper PLS using anion-exchange resins. The ion-exchange process used to extract uranium from the leaching solution was based on the high binding of the sulphate anion complexes to uranium, to the anion-exchange resin (Rosenberg et al., 2016).
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This study aimed to recover U(VI) from sulfate-based acidic soil-washing effluent using the ion-exchange method. For effective ion exchange of U(VI) under acidic conditions, one chelate resin (Purolite S950) stable under low pH conditions and two anion-exchange resins (Ambersep 400 SO4 and 920U SO4) used in sulfuric acid leaching …
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A process is described for the recovery of uranium values from uranium-bearing material by sulphuric acid leaching when the material also contains siliceous matter which is at least partly soluble ...
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This work studies the removal of uranium ions from chemically leached solutions by sorption using two weak and two strong base anionites. Batch sorption experiments were performed to evaluate the ...
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Stable metals removal. The AG ® MP-1M anion exchange column cycling process was continued to remove all other impurities and any trace plutonium. The feed …
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Therefore, the separation of U(VI) ions from aqueous solutions using ion-exchange resins is an active research topic, and results related to removing U(VI) from …
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The total capacity (TC) of the solid exchanger phase and the total normality of the solution is to be held constant throughout the ion exchange process. The total ion exchange capacity of the synthesized nano-cerium vanadate for all the sorption isotherms and Kielland plots was assumed to be the theoretical ion exchange capacity (11.76 …
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NiCo(BDC) bimetallic Metal-Organic Framework (MOF) is impregnated with MnO 2 particles to synthesize a highly stable NiCo(BDC)@MnO 2 composite. This MOF composite is applied for the removal of Copper (II), Chromium (VI), and Uranium (VI) heavy metal ions from aqueous solutions using batch adsorption and the fixed-bed column …
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For this reason, uranium must be extracted from the copper PLS using anion-exchange resins. The ion-exchange process used to extract uranium from the leaching solution was based on the high binding of the sulphate anion complexes to uranium, to the anion-exchange resin (Rosenberg et al., 2016). The ion-exchange …
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The current study was attributed to uranium (VI) ions adsorption using a anion exchanger resin, Dowex®2x8, in the presence of sulfate anions. Evaluation of operational parameters including contact time, pH, initial concentration of uranium ions, and presence of various anions (including phosphate, sulfate, chloride, fluoride, and nitrate) in the solution was …
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At low initial uranium concentration, the uranium removal percentage on the composite exceeded 99.7 % and the residual concentration of uranium in the solution was <0.03 mg/L, reaching the limited ...
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The uranium mining industry has become heavily reliant on the use of strong base anion (SBA) exchange resins for the extraction of uranium. However, these conventional SBA resins are not compatible with the use of low quality waters, due to the suppression of ion exchange (IX) at high ionic strengths [2], [3].
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The pH affected the adsorption of Bent-NH 2 by affecting the aquatic species distribution of uranium, the process of protonation and deprotonation on the surface of ... Tang X, Liu Y (2022) Insights on uranium removal by ion exchange columns: the deactivation mechanisms, and an overlooked biological pathway. Chem Eng J …
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NiCo(BDC) bimetallic Metal-Organic Framework (MOF) is impregnated with MnO 2 particles to synthesize a highly stable NiCo(BDC)@MnO 2 composite. This MOF composite is applied for the removal of Copper (II), Chromium (VI), and Uranium (VI) heavy metal ions from aqueous solutions using batch adsorption and the fixed-bed column …
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Abstract. The feasibility of employing ion-exchange resins for the selective removal of uranium from a complex waste effluent has been investigated. The source of the effluent is a treatment process to reduce the volume of a spent uranium containing catalyst prior to its immobilisation and disposal in South Korea.
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The feasibility of employing ion-exchange resins for the selective removal of uranium from a complex waste effluent has been investigated. The source of the effluent is a treatment process to reduce the volume of a spent uranium containing catalyst prior to its immobilisation and disposal in South Korea. Commercial anion exchange and chelation ...
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Orange peel is an important resource in view of its low-cost and universal nature. A novel material (MnO 2 /orange peel carbon, MnO 2 /OPC) was yielded via a …
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The effect of contaminants on the application of polyamine functionalised ion exchange resins for uranium extraction from sulfate based mining process waters ... Discussions has been furnished on the key mechanisms involved in the uranium removal using the highlighted adsorbentswith reference to adsorption kinetics and isotherm …
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Residuals. • The more effective the coagulant or adsorbent, the higher is the radioactivity in the residuals. Ion Exchange Softening for Radium Removal. 600 pCi/L spent brine 20 …
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