Sorption of Uranium from Sulfuric Acid Leaching Solutions by Strongly Basic Anion Exchangers

Kolomiets, D. N.; Трошкина, И. Д.; Sheremet’ev, M. F.; Konopleva, L. V.

doi:10.1007/s11167-005-0379-8

Cited by 16 publications

(6 citation statements)

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“…Further growth of the NaCl content in the solution adversely affects the degree of uranium recovery. This is due to the formation of a neutral complex of UO2Cl2 and an anionic complex of UO2Cl3 -, which are extracted by anion exchangers [19].…”

Section: Regeneration In Static Modementioning

confidence: 99%

“…The presence of chloride ions suppresses the uranium recovery by anion exchangers [12][13][14]. The process of uranium sorption by ion exchange resin is the basis of a large amount of technological schemes for reprocessing productive solutions [15][16][17][18][19]. Therefore, in this paper, the processes of uranium sorption from ISL solutions with an increased content of chloride ions by using of industrial grade ion exchangers have been studied, and various options for the subsequent regeneration of saturated resins have been considered.…”

Section: ■ Introductionmentioning

confidence: 99%

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Processing of Chloride-Containing Productive Solutions after Uranium <i>in situ</i> Leaching by Ion Exchange Method

et al. 2019

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The uranium sorption from productive solutions containing chloride ions using anion-exchange resins was investigated. The VPAE ion exchanger had the highest values of the sorption capacity, which for the experiment in the static mode was 13 kg U m-3, and for the experiment in the dynamic mode, it was equal to 36 kg U m-3. The use of VPAE anion exchanger will make it possible for uranium recovery from productive solutions with an increased content of chloride without sacrificing the productivity of the sorption plant. The process of saturated resins regeneration by various reagents was investigated. The use of ammonium nitrate solution with sulfuric acid ensured maximum value of uranium recovery from the saturated resin phase (76–97%).

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Section: Regeneration In Static Modementioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Processing of Chloride-Containing Productive Solutions after Uranium <i>in situ</i> Leaching by Ion Exchange Method

et al. 2019

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“…The sorption of uranium from sulphuric acid solutions by strongly basic anion exchange resin is widely described in literature [12][13][14][15][16][17][18][19]. Strongly basic anionic exchangers were often utilized in uranium industry [20][21][22] and are even recognized as the most suitable ion exchangers for uranium recovery [23].…”

Section: Introductionmentioning

confidence: 99%

Ion exchange investigation for recovery of uranium from acidic pregnant leach solutions

et al. 2017

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Abstract.The article describes studies on the separation of uranium from acid pregnant leach solutions obtained from Polish uranium ores: dictyonema shales and sandstone rocks. Ion exchange chromatography was applied for uranium sorption, using commercially available, strongly basic anion exchanger, Dowex 1. In model experiments, the infl uence of degree of crosslinking of Dowex 1 on the effi ciency of uranium extraction was investigated. The effect of H 2 SO 4 concentration on the breakthrough curve of uranyl ions for the Dowex 1 resins, of different crosslinking: X4, X8 and X10, was examined. Unexpectedly high increase of exchange capacity of uranium was observed in case of Dowex 1X10. This gives potential opportunity of improving the effectiveness of uranium recovery process. Applying column packed with Dowex 1X10, 'yellow cake' with ca. 92% yield and high purity of recovered uranium was obtained. A block diagram of the procedure for uranium and lanthanides extraction from acidic leach liquor has been proposed.

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“…In this process, the majority of other elements remain in solution. The sorption of uranium from sulfuric acid leaching liquors using anionic sorbents can be described by reactions of complexation and ion exchange [4,5]. …”

Section: Introductionmentioning

confidence: 99%

Investigation of uranium sorption from acidic sulfate solution using organosilicate compound and Amberlite IRA 402

2014

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KEYWORDSSorption of uranium from 6 M free H2SO4 on two anionic sorbents containing different complexing groups, the synthetic Organosilicate compound (OSC) and the Amberlite IRA 402, were investigated. The sorption mechanisms of uranium on both sorbents were also studied. Experimental data indicated that the uranium sorption on either Amberlite IRA 402 or OSC is a function in pH, depending strongly on the aqueous uranyl species. Both sorbents reached a maximum at slightly acidic (pH = ~1) when uranium is exist in the form of negatively charged sulfate complexes. These sorption values were attributed to the ion exchange process between UO2 +2 species and interlayer anions on Amberlite IRA 402 and OSC in acidic solutions. Uranium sorbed on OSC through formation of ML3 complex and ML2 for Amberlite IRA 402. Also it was found that the uranium sorption capacity was 20 and 80 mg/g for Amberlite IRA 402 and OSC, respectively, and its elution were effective even with 5 mL of 1 mol/L KNO3. Sorption Uranium Investigation Sulfate solution Amberlite IRA 402 Organosilicate compound

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Sorption of Uranium from Sulfuric Acid Leaching Solutions by Strongly Basic Anion Exchangers

Abstract: The equilibrium and kinetic characteristics of uranium sorption from simulated sulfuric acid leaching solutions by AMP, Lewatit K 6367, Purolite A 500, Purolite A 600, and AM-p gel-like and porous strongly basic anion exchangers were studied.

Cited by 16 publications

References 1 publication

Processing of Chloride-Containing Productive Solutions after Uranium <i>in situ</i> Leaching by Ion Exchange Method

Processing of Chloride-Containing Productive Solutions after Uranium <i>in situ</i> Leaching by Ion Exchange Method

Ion exchange investigation for recovery of uranium from acidic pregnant leach solutions

Investigation of uranium sorption from acidic sulfate solution using organosilicate compound and Amberlite IRA 402

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