Concentration–Purification of Uranium from an Acid Leaching Solution

Guettaf, Hayet; Becis, A.; Ferhat, K.; Hanou, K.; Bouchiha, D.; Yakoubi, K.; Ferrad, F.

doi:10.1016/j.phpro.2009.11.023

Cited by 39 publications

(20 citation statements)

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“…McArthur River) and Russia (Skirrow et al, 2009;Fayek et al, 2011). Uranium ores mined in these deposits are normally processed via a hydrometallurgical route (leaching) and the technique is well documented (Guettaf et al, 2009). …”

Section: Uraniummentioning

confidence: 99%

Challenges and opportunities in the recovery/rejection of trace elements in copper flotation-a review

Agorhom

Lem

Skinner

et al. 2015

Minerals Engineering

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Section: Uraniummentioning

confidence: 99%

Challenges and opportunities in the recovery/rejection of trace elements in copper flotation-a review

Agorhom

Lem

Skinner

et al. 2015

Minerals Engineering

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“…The solution was then loaded on an anion exchange commercial resin (Amberlite IR400 (Merritt, 1971;Guettaf, et al, 2009), which is of lower cost than Dowex 1×8 at a flow rate of 1.3 ml/min. The resin column was preconditioned before loading by passing 100 ml of 5 % sulphuric acid.…”

Section: Recovery Of Uraniummentioning

confidence: 99%

“…Before elution process, the column was washed with distilled water to displace the pregnant solution. Uranium was then eluted from the resin using 0.9 N NH 4 NO 3 /0.1 N HNO 3 mixture at flow rate 1.09 ml/min (Guettaf, et al, 2009) instead of 1 M H 2 SO 4 because in a sulphuric acid medium, the uranium precipitate is pasty and difficult to filter. On the other hand, the sulphate concentration does not meet the yellow cake specification.…”

Section: Recovery Of Uraniummentioning

confidence: 99%

Uranium evaluation and its recovery from microgranite dike at G. El Sela area, South Eastern Desert, Egypt

2014

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The present work aims at integrating detailed field studies to prospect for uranium ores associated with microgranite dike. The investigated El Sela area is covered by two types of granitic intrusion comprising biotite granite and two-mica granite. They are cut by microgranite, dolerite, and bostonite dikes, and quartz and jasper veins. U mineralization is observed along an ENE-WSW shear zone where quartz and jasper veins bounded the microgranite dike which is affected by successive brecciation and fracturing. Ferrugination, silicification, kaolinization, illitization, and fluoritization affected microgranite dike having visible U mineralization. Different fractures in two-mica granite acted as good channels for the ascending hydrothermal fluids and the percolating meteoric water that leached uranium from its bearing minerals disseminated all over the host two-mica granite and redeposited them in microgranite dike along the main shear zone trending ENE-WSW. Uranium was determined in the collected samples spectrophotometrically using arzenaso III as complexing agent. Uranium concentrations measured by chemical analyses are higher than the "gamma radiometric" determinations of the same microgranite samples, which can be explained by a state of disequilibrium in the uranium decay series. Sulphuric acid was used, in the present work, for leaching uranium from a representative mineralized sample of highly ferruginated microgranite. Conditions were briefly studied to achieve uranium recovery under optimum conditions. The acid-leaching operating conditions allowed us to obtain a uranium recovery of about 90 %. Ion exchange resin was used for the concentration and purification of our pregnant solution. A 75 % dry uranium concentration in final yellow cake product has been achieved.

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“…Yellow cake is obtained from uranium ore. The ores are processed through several stages of process such as breaking, dissolution, alkaline or acid leaching, extraction or ion exchange resin and precipitation [1,2] .…”

Section: Introductionmentioning

confidence: 99%

Effect of Current, Time, Feed and Cathode Type on Electroplating Process of Uranium Solution

Sigit

Widodo²,

Wasito³

et al. 2017

urania

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EFFECT OF CURRENT, TIME, TYPE OF FEED AND CATHODE ON ELECTROPLATING PROCESS OF URANIUM SOLUTION.Electroplating of uranyl nitrate and process effluent has been carried out in order to collect uranium contained therein using Pt/Pt and Pt/SS electrodes at various current and time values. The materials used as electrode were Pt (platinum) and SS (Stainless Steel). Feed solution of 250 mL was entered into a beaker glass equipped with Pt anode -Pt cathode or Pt anode -SS cathode and connected to direct current source from DC power supply at various current values and for various time periods so that uranium precipitated and deposited onto the cathode. Upon deposition completion, the cathode was removed and weighed to determine weight of precipitates, while the solution was analyzed to determine uranium concentration decrease after electroplating process. The experiment shows that a relatively good time to acquire uranium deposit at the cathode was 1 hour at 7 ampere, with uranyl nitrate as feed and Pt (platinum) as cathode. In these conditions, uranium deposit attached to the cathode amounted to 74.96% of the original weight of uranium oxide in the feed or 206.5 mg by weight. The use of Pt cathode for uranyl nitrate feed, and SS and Pt cathodes for effluent feed resulted in uranium specific weight at the cathode of 12.99 mg/cm2, 2.4 mg/cm 2 and 5.37 mg/cm 2 respectively for 7 Ampere current for 1 hour electroplating time.Keywords: electroplating, uranyl nitrate, effluent process, Pt/Pt electrode, Pt/SS electrode.

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Concentration–Purification of Uranium from an Acid Leaching Solution

Cited by 39 publications

References 1 publication

Challenges and opportunities in the recovery/rejection of trace elements in copper flotation-a review

Challenges and opportunities in the recovery/rejection of trace elements in copper flotation-a review

Uranium evaluation and its recovery from microgranite dike at G. El Sela area, South Eastern Desert, Egypt

Effect of Current, Time, Feed and Cathode Type on Electroplating Process of Uranium Solution

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