POMNs showed superior aqueous dispersibility and could be readily recovered by magnetic separation. The uranium(VI) sorption of POMNs achieved equilibrium in 5 min with a capacity of 141.4 mg g −1 in a single-element solution of uranium at pH 8.0 and 298.15 K.

Magnetic adsorbents in combination with magnetic separation techniques have received considerable attention in recent years due to their magnetically responsive nature for selective manipulation and rapid separation. Herein, we report a novel kind of magnetic hydrothermal carbon nanosheets loaded with magnesium ferrite as an efficient adsorbent for uranium uptake, in which the original ...

Moreover, the magnetic property of the as-prepared [email protected] 2 O 4 was measured and found to be used for magnetic separation. Therefore, the developed process using [email protected] 2 O 4 as …

Continuing interest in processes that will effect separations in the fine particle size range has prompted intense interest in the use of high gradient magnetic separation (HGMS) for beneficiation of uranium ores. Some of the uranium minerals are paramagnetic and hence are amenable to …

The contaminated nMAG is removed from the drinking water by either retention in a sand column, filter, or by magnetic separation. The uranium adsorption process was also utilized for the enhanced detection of uranium in environmental matrices. By relying on alpha-particle detection in well-formed and dense nMAG films, it was possible to improve ...

the paper industry.Magnetic separation of uranium from MgFz has shown potential in wet and dry systems. Aven et al. showed that for an OGMS system separation of Pu from graphite, bomb reduction, sand, slag, and crucible were possible obtaining Pu rich and lean fractions.

Uranium is a naturally occurring radionuclide found at low levels in rocks, sediments and soils. The average U concentration in the earth crust is between 2 and 4 ppm. However, it can ... magnetic separation and has been investigated in the processing of wastewater treatment and

With such coating, the chemical stability increases, with still good magnetic properties suitable for magnetic separation. ... Uranium standard solution of a concentration of 1000 ppm, prepared in 2–5% nitric acid, was obtained from Accustandard. 2.2. Synthesis of magnetic nanoparticles.

Uranium separation from magnesium fluoride has shown exceptionally good performance in both wet and dry systems and could be an important application of the technology. Keywords: magnetic …

Electromagnetic Isotope Separation Uranium Enrichment. ... that is located in a strong magnetic field. For the EMIS ion source, solid uranium tetrachloride (UCl 4 ) is electrically heated to ...

Using the paramagnetic character of uranium minerals, the preconcentration of uranium bearing ores and copper plant tailings of Singhbhum area have been investigated in a pilot plant scale wet high …

The magnetic adsorption material of polyaniline (PANI) with amino functional group combined with CuFe 2 O 4 (CuFe 2 O 4 /PANI nanocomposite) has been described in this work. It has been characterized by TEM, XRD, XPS, BET, FTIR, and VSM, respectively. Significantly, it exhibits extremely high maximum adsorption capacity (322.6 mg/g) for removal of uranyl ions from wastewater …

Wet high intensity magnetic separation of some uranium ores ..., Wet high intensity magnetic separation of some uranium ores of India * K. Viswamohan * S. R ... Read more which ores can be concentrated by magnetic separation

However, the magnetic separation technology is a kind of efficient, rapid and inexpensive separation method. Magnetic chitosan resins can be prepared via the combination of chitosan and magnetic particles, and easily removed from the reaction …

One-pot magnetic separation of uranium (U) in seawater and groundwater samples has been made possible by synthesizing phosphoramidate functionalized Ag coated citrate-Fe 3 O 4 nanoparticles (NPs). The magnetic saturation value of these functionalized NPs is 27.1 emu g −1.The synergistic extraction mechanism of U(VI) ion by the surface-modified phosphoramidate and citrate …

of the magnetic field and the mass, electrical charge, and speed of the ion. Lighter ions are more easily deflected by the magnetic field and consequently have a smaller diameter trajectory. For the separation of U-235 and U-238, the diameter of the 235U+ ion beam is about 0.6% smaller than that of the 238U+ ion. In an electromagnetic isotope ...

intensity magnetic separation wasfirstobserved during thecentralized research programme ontheextraction of uranium that wasinitiated attheGovernment Metallur-gicalLaboratory in194612.Noimportance wasattached totheobservation because, atthat time, high-intensity magnetic separation meant adryprocess, whichwasnot practicable forWitwatersrand ores.

of the magnetic field and the mass, electrical charge, and speed of the ion. Lighter ions are more easily deflected by the magnetic field and consequently have a smaller diameter trajectory. For the …

Then external magnetic field with magnetic intensity of 1.7 T at optimum condition of sorption process was applied to complete the separation of uranium. The final efficiency was 89.1 % that was a little less than sorption efficiency due to the relatively low applied external magnetic field intensity for separation of iron from solution.

10. (a) Triply charged uranium-235 and uranium-238 ions are being separated in a mass spectrometer. (The much rarer uranium-235 is used as reactor fuel.) The masses of the ions are 3.90 × 10 −25 kg and 3.95 × 10 −25 kg, respectively, and they travel at 3.00 × 10 5 m/s in a 0.250-T field. What is the separation between their paths when ...

After magnetic separation, the sorbent was recovered and the uranium concentration in the supernatant was determined using eqn (10). The metal-loaded sorbent (after being washed with demineralized water) was mixed with HNO 3 (0.02 M) for 45 min at 25 °C.

Magnetic measurements of CoFe 2 O 4 were investigated using the VSM technique and the result of magnetic hysteresis at room temperature shows that there is a small hysteresis in the hysteresis loops of CoFe 2 O 4, the remanence is 22.08 emu/g, and the coercivity is 619.18 G. The saturation magnetization of CoFe 2 O 4 is 71.70 emu/g. A large saturation magnetization makes this …

There are many methods of separation (concentration) of minerals: 1) Gravity separation. There are more than 12 types of gravity separation of minerals. It is used for the extraction of gold, coal, cassiterite, wolframite, rare earth mineral, niobium, zirconium, uranium minerals, and others. Read more. 2) Magnetic separation. There are more than 14 types of magnetic separation of minerals.

High Gradient Magnetic Separation of Uranium Ores. Continuing interest in processes that will effect separations in the fine particle size range has prompted intense interest in the use of high gradient magnetic separation (HGMS) for beneficiation of uranium ores. Some of the uranium minerals are paramagnetic and hence are amenable to ...

Selective magnetic separation of uranium and gold Abstract: Energetic and kinetic criteria for the selective magnetic separation of a useful mineral from a system containing several mineral species …

Magnetic and Electrical Separation | Discontinued in 2003. ... The rest of the uranium values were found to get enriched to 0.15% U3O8 in the –20 µm fraction of the non-magnetic material ...

Wet high intensity magnetic separation of some uranium ores of India * K. Viswamohan * S. R. Shivananda and * K. K. Dwivedy INTRODUCTION Wet High Intensity Magnetic Separation (WHIMS) or magnetic filtration is relatively a new process used in the mineral industry and it is generally being used for the removal of mag-

Request PDF | Magnetic separation of uranium by CoFe2O4 hollow spheres | Cobalt ferrite hollow spheres were prepared by a simple solvothermal method. The obtained CoFe2O4 was applied as …

Moreover, the magnetic property of the as-prepared [email protected] 2 O 4 was measured and found to be used for magnetic separation. Therefore, the developed process using [email protected] 2 O 4 as an adsorbent is promising to mitigate uranium pollution generated in a nuclear accident, and a pilot scale test for process optimization is ...

Herein, a strategy was developed for selective uranium separation from SLLWs and highly efficient regeneration by thermosensitive ion-imprinted magnetic microspheres ().Specifically, …

To obtain an adsorbent for uranium with superb adsorption capacity, a rapid adsorption rate and quick magnetic separation, magnetic calcium silicate hydrate (MCSH) is fabricated through in situ growth of calcium silicate hydrate (CSH) onto the surface of the magnetic silica microspheres via a sonochemical method. The chemical components, and structural and morphological properties of …

Magnetic assisted separation of uranium(VI) from aqueous phase using diethylenetriamine modified high capacity iron oxide adsorbent Author links open overlay panel P. Amesh a b A.S. Suneesh a B. Robert Selvan a K.A. Venkatesan a b Manish Chandra a

Providing adequate adsorption capacity and magnetic properties to facilitate adsorbent separation opens a new approach toward developing CS-based uranium adsorption materials. Dopamine It can easily oxidize to dopa-quinone and polymerize to yield polydopamine (PDA) under alkaline conditions, strongly adhering to the other substrate [ 107 ].

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