As a result, the removal and recovery of uranium from wastewater is required in terms of both resource recovery and contaminant treatment necessitate. To date, various uranium removal methods have been developed, including extraction, co-precipitation, ion exchange, membrane separation, and adsorption . Among these, …
Lithium recovery from desalination brines using specific ion-exchange resins. ... Separation and recovery of lithium from geothermal water by sequential adsorption process with λ-MnO 2 and TiO2. Ion Exch. Lett., 5 (2012), ... Removal of lignin and tannin colour from aqueous solution by adsorption onto activated charcoal.
Herein, we report a general secondary metal ion-induced strategy for electrocatalytic reducing aqueous uranyl ions to UO 2 or bimetallic M x (M = Ce, Eu, Th, …
in a much more challenging matrix. Primary concerns are centered around the removal capacity and kinetics, selectivity, energy efficiency, device regeneration and production …
Uranium determination in environmental samples is faced with problems due to presence of iron and other major elements. Iron is also used many a times for pre-concentration of uranium and actinides. Separation of milligram quantity of Fe from microgram quantity of uranium becomes essential during the estimation step. A simple …
The water then proceeds to the uranium ion exchange section. The ion exchange configuration is shown in figure 8. There are two lead columns, one in operation and one …
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.
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
The water then proceeds to the uranium ion exchange section. The ion exchange configuration is shown in figure 8. There are two lead columns, one in operation and one on standby/regeneration. The aim is to reduce the uranium concentration below 20 µg/ℓ. The lead columns contain 100 ℓ of Lewatit MonoPlus S6368 resin and operate at 20
The chloride (Cl) ion of the salt molecule is utilized by the anion exchange site, the sodium (Na) ion passes right through the resin bed and does not affect the process. Operational Guidelines The anion …
Stable metals removal. The AG ® MP-1M anion exchange column cycling process was continued to remove all other impurities and any trace plutonium. The …
It shows an enhanced uranium extraction of 443.2 mg g −1 under 1 Sun irradiation. • It exhibits a very high evaporation rate of 3.75 kg m −2 h −1 under 1 Sun …
An innovative MnO/Ti 3 C 2 MXene heterostructure, consisting of three-dimensional (3D) MnO nanosheet array directly assembled on two-dimensional (2D) Ti 3 C 2 MXene nanosheets, was synthesized via a simple hydrothermal-annealing strategy for uranium elimination. This unique 3D/2D heterostructure derived substantially high …
The process of the uranium sorption involves preferentially the interaction of the neutral [UO 2 SO 4 (H 2 O) 4] species, which accounts of 80% of the uranium …
The composite of ion exchangers (MnO 2 –ZrO 2) with polyacrylonitrile (MnO 2 –ZrO 2-PAN) was produced by dissolving the MnO 2 –ZrO 2 powder in dimethyl sulfoxide (DMSO) which involved 4% (w ...
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].
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 mining-process waters (Amphlett et ...
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 …
Several novel processes have been developed for the recovery of uranium from wet-process phosphoric acid. 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, Duolite ES467, and …
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 …
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 single step involving activation and in situ deposit. The feasibility of uranium removal using MnO 2 /OPC was tested by varying MnO 2 loading amount, pH, ionic strength, …
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 …
Attention is paid mainly to ion exchange using different states of oxidation of uranium in aqueous and organic solutions. The bibliography contains 70 references. Read more
The order of U(VI) removal in the UV/FA process was as follows: FA (HCOOH) > CA > L-TA > D-TA > AA > MA. ... membranes for uranium removal from aqueous solution. Prog Nucl Energy 94:93–100. Article CAS Google Scholar Reinoso-Maset E, Ly J (2016) Study of uranium(VI) and radium(II) sorption at trace level on …
Our CIF ® (continuous ionic filtration) technology can be used to reduce or remove uranium, using a strong base anion exchange resin to target uranium ions. The process uses physical filtration alongside ion exchange, which has the added benefit of removing other impurities in the feed water, and delivering higher removal efficiencies than …
The removal of uranium from water supplies using chloride form anion resins. ← Choosing the perfect softening resin → The Practical Aspects of Ion Exchange in the Service DI Industry (Part 1 and 2)
The World Health Organization reports that reverse osmosis treatment will remove 90-99 percent of uranium. Reverse Osmosis is a process that filters most impurities from water by using a high ... Ion Exchange systems are also recommended by the EPA for removing radioactive compounds from drinking water. Ion exchange is a …
Uranium redox chromatographies were carried out in order to study uranium isotope separation based on chemical process. Hexavalent uranium ions were first adsorbed in the anion-exchange resin ...
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 ...
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 …
Ion exchange (IX) is an attractive approach to extract uranium from wastewater, simultaneously reducing the negative environmental impact of uranium …
Ion exchange has traditionally been employed for the purification of water and the removal of metal contaminants from dilute waste streams. More recently, its use in removing trace metallic impurities from hydrometallurgical process streams (with typical background metal concentrations of 50–100 g/L) has increased substantially.