Elimination of radionuclide uranium (VI) from aqueous …
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 …
Uranium Removal By Ion Exchange Process Using Mno
Uranium Mining and Extraction from Ore
Uranium leaching is the process by which the uranium is extracted from the raw ore by reacting the material with acid or base. Fig. 2 shows a general process flow for the uranium extraction process. Prior to the leaching process, the ore is often given preliminary treatments that can include roasting and grinding.
Rapid removal of uranium(Ⅵ) using functionalized luffa rattan biochar
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 …
Uranium Processing | SpringerLink
Several oxidizing agents such as MnO 2, NaClO 3, ... For uranium extraction the ion exchange process is a physicochemical method, whereas solvent exchange is primarily a chemical method and offers several advantages such as reduction of the volume of solution that is chemically treated further to recover uranium and yielding uranium …
Uranium Recovery from Sulfate-Based Acidic Soil Washing Effluent Using
The use of ion exchange resins for the concentration and recovery of uranium from low grade solutions is a recognized process which has been practiced for many years. The method of application has ...
(PDF) Sulphuric acid leaching of uranium ore using MnO 2 …
PDF | On Nov 13, 2019, S H Ahmed and others published Sulphuric acid leaching of uranium ore using MnO 2 as an oxidizing agent | Find, read and cite all the research you need on ResearchGate
Enhanced uranium separation by charge enabling γ-MnO
The product was sonicated, washed, and dried for further use. CC/γ–MnO 2 is assembled into a Zn–MnO 2 cathode electrode, and the charge–discharge cycle is performed to obtain CC/γ–MnO 2 –OVs. The experimental process and formation mechanism are shown in Fig. S1-S3 (Supporting Information). 2.4. Synthesis of CC/γ …
Uranium in Water Removal by Ion Exchange | WaterWorld
Obviously, cation resin is not a viable ion exchange removal method because of the pH requirements and especially when the technique is compared to strong base anion resins. Anion resin in the chloride form can easily reduce uranium levels by over 90%. It can be used in a regenerable process or once-through.
Chemical processes for recovery and purification of high …
A new processing scheme was developed using an anion exchange column run in a cycling mode with HNO3 media as the primary uranium purification process. …
Removal of chloride ions from a copper leaching solution, using …
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 …
Insights on uranium removal by ion exchange columns: The …
Molecular ecological network analysis indicated the synthetic metabolisms among metal remediation bacteria and autotrophs might play major roles in microbial-mediated …
Separation of uranium from iron in ground water samples using ion …
Methods based on ion exchange resins using sulphuric acid and ammonium sulphate, controlled redox potential methodology using hydrogen peroxide for separation of traces of uranium from iron have been reported [6–8] As per the reported method uranium and iron mixture was loaded on the anion exchanger in 0.2N H 2 SO 4 …
Removal of Uranium (VI) by Fixed Bed Ion-exchange Column Using …
Removal of Uranium (VI) by Fixed Bed Ion-exchange Column Using Natural Zeolite Coated with Manganese Oxide. ... k ad) again showed that the internal resistance is the governing mass transfer resistance to the Th(ІV) biosorption process. ... Uranium recovery using ion exchange. Journal of Industrial and Engineering …
Chemical processes for recovery and purification of high-purity uranium
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 …
Uranium and molybdenum recovery from copper leaching solutions using
The ion exchange process used to extract uranium from the leaching solution is based on the high binding constants of the anionic sulfate complexes of uranium relative to the anion on the anion exchange resin (chloride), primarily due to their higher negative charge. ... saturated MnO 2 /CNC@DP were conducted by using acidic and …
Enhanced uranium separation by charge enabling γ-MnO 2 …
Wang et al. synthesized α–MnO 2 @polydopamine nanocomposites (α–MnO 2 @PDAs) by coating α–MnO 2 nanowires with polydopamine for U(VI) removal from solution. [19]. [19]. Despite its benefits, nanosized MnO 2 –based particles are easy to agglomerate in the process of adsorption due to high surface energy [20].
Insights on uranium removal by ion exchange columns: The …
Ion exchange (IX) is an attractive approach to extract uranium from wastewater, simultaneously reducing the negative environmental impact of uranium …
Kinetic, isotherm, and thermodynamic investigations of uranium …
AbstractIn this study, an amidoximated chelating ion-exchange resin was prepared using poly-acrylonitrile grafted potato starch. The resin characterizations such as specific surface area, pore volume, average pore radius, and Fourier transform infrared spectroscopy of the resin were defined. The effects of pH, contact time, adsorbent …
Removal of heavy metal ions from wastewater: a comprehensive …
The ion exchange mechanism for metal removals can be explained in the following reaction as the ion exchange particle having ion exchanger of M − EC + (M − is the fixed anion and EC + is the ...
Enhanced uranium separation by charge enabling γ-MnO
Removal of radioactive UO 2 2+ from water by effective adsorbents is highly desired but remains a challenge. This research demonstrates a promising approach to …
Notes of Practical Ion Exchange in Uranium Extractive …
uranium for ion exchange sites. Common examples are vanadate, molybdate, chloride, and nitrate. 2. Substances fouling ion exchange resins: compounds which form inert deposits or salts inside and/or on the surface of ion exchange resins. Such deposits are not removed by common treatment and require special care.
Nano-cerium vanadate: A novel inorganic ion exchanger for removal …
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 …
Insights on uranium removal by ion exchange columns: …
Ion exchange (IX) is an attractive approach to extract uranium from wastewater, simultaneously reducing the negative environmental impact of uranium mining and recovering uranium resources. However, the IX process is limited by the deactivation of the resin, and the role played by microorganisms attached to the resin remains …
Uranium Removal from Aqueous Solution Using Ion-exchange …
Experimental measurements have been made on the batch extraction of uranium from phosphoric acid solutions using various chelating ion-exchange resins (RSPO, Diaion-CRP200, Diphonix, Purolite S940 ...
Insights on uranium removal by ion exchange columns: …
Semantic Scholar extracted view of "Insights on uranium removal by ion exchange columns: The deactivation mechanisms, and an overlooked biological pathway" by Fan Chen et al. ... This study identified key players involved in the SMX degradation process and unraveled the internal labor division patterns and connections among the …
(PDF) Removal of Uranium from Mine Water using Ion Exchange …
REMOVAL OF URANIUM FROM MINE WATER USING ION EXCHANGE AT DRIEFONTEIN MINE M. BOTHA1, L. BESTER 1 and E. HARDWICK2 1 Gold Fields, Driefontein Mine, Gauteng, South Africa, [email protected] 2 Cwenga Technologies, Edenvale, Gauteng, South Africa, [email protected] ABSTRACT Mine waters from gold …
Uranex® | Veolia Water Technologies
URANEX® PROCESS. URANEX process for urane removal from drinking water - Veolia. The URANEX®-process is an ion exchange technology that adsorbs uranium from water very selectively without changing the remaining water constituents. The raw water enters the adsorption filter from the top and flows through it in a run-off mode (see flow …
(PDF) Ion Exchange in Hydrometallurgical Processing: An …
Ion exchange has traditionally been employed for water purification and the removal of metal contaminants from dilute waste streams. More recently, its use in removing trace metallic impurities ...
SOHIO process legacy waste treatment: Uranium recovery using ion exchange
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.
Dynamic Simulation of Uranium Ion Exchange Processes
The utility of process simulation for design and optimization of a uranium ion exchange plant is demonstrated in this work. A dynamic SysCAD model of an ion exchange loading, washing, and elution circuit is presented. Ion exchange is a sequential batch process circuit operating within an overall continuous process.
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