Hydrous oxides in the concentration and removal of fission products from alkaline solutions of uranium

Rodríguez, A. S.; López, Beatriz; Baca, Alfred J.; Gutiérrez, C.

doi:10.1007/bf02060320

Cited by 4 publications

(1 citation statement)

References 6 publications

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“…Considerable groundwater remediation research has been focused on the removal of contaminated water from the subsurface, but, while removal of pollutants is desirable from an environmental standpoint, the costs are often prohibitive, and contaminant concentrations are rarely lowered to the required levels. Several processes have been proposed and implemented for the removal of actinides from aqueous media [1][2][3][4][5]. These include precipitation and ion exchange as well as sorption on organic resins, natural zeolites, and clays.…”

Section: Introductionmentioning

confidence: 99%

Uranium Sorption on “Tezontle” Volcanic Rock

et al. 2019

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It is described a study that demonstrates that hexavalent uranium ions were sorbed by the naturally occurring mineral using a batch technique. This mineral is found in abundant quantities in Mexico. Our study focused on the separation of UVI from synthetic aqueous systems of both H2O-UO2(NO3)2.6H2O (acid) and H2ONa4[ UO2(CO3)3] (basic). The chemical speciation was performed by using high voltage electrophoresis, and the uranium content was determined by UV-Vis Spectroscopy. The quantified U(VI) sorption by tezontle from acidic and basic systems was 2.72 and 1.68 μmol/g, respectively, and the sorption behavior is discussed considering the surface charge of the tezontle at different pH values based on the point of zero charge characteristic of this material.

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Section: Introductionmentioning

confidence: 99%

Uranium Sorption on “Tezontle” Volcanic Rock

et al. 2019

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Trace concentrations of88Y,103Ru,134Cs, and141Ce in strongly alkaline aqueous solutions containing an excess of UO 2 2+

S¹,

M²,

G³

1998

J Radioanal Nucl Chem

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The electrophoretic mobility of some radionuclides has been measured to understand its attractive or repulsive tendencies towards other charged species in the medium. In this study, the chemical state of trace concentrations of 88y, 103Ru ' 134Cs ' and 14lee in the presence of UO 2+, as a dominant component, in strongly alkaline aqueous solutions (pH>13) was characterized. 88y and 141Ce settled almost completely as colloidal species; whereas l~ 134Cs, and uranium remained as ions. These results closely correlate a procedure for defining both the composition of the water in contact with the fuel and the practical applicability of modified sorbents.

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Sorption behavior of γ-irradiated α-Al2O3

Rodríguez¹,

López²

1998

J Radioanal Nucl Chem

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Irradiation of o~-A1203 (Corundum) was carried out in contact with acidic media and with different doses (100-to-2500 kGy) and dose-rates (0.9, 2.6 and 6.1 kGy.h 1) of y-rays. Simultaneously parallel experiments were carried out using the same procedure, but preheated at 150 ~ for two days and then irradiated without acidic media. The solid thus obtained was used to determine the effect of y-irradiation on the sorption capacities of microamounts of fission products from strongly alkaline aqueous solutions of uranium. The results revealed that the effect of y-irradiation of c~-A1203 and the acidic media in which it is immersed, is associated with a stable matrix resistant to significant changes in the composition of the surface layer; whilst it seems that the effect of y-irradiation of preheated c~-A1203, is connected with changes of surface OH groups strongly affected by heat treatment and irradiation dose.

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Hydrous oxides in the concentration and removal of fission products from alkaline solutions of uranium

Cited by 4 publications

References 6 publications

Uranium Sorption on “Tezontle” Volcanic Rock

Uranium Sorption on “Tezontle” Volcanic Rock

Trace concentrations of88Y,103Ru,134Cs, and141Ce in strongly alkaline aqueous solutions containing an excess of UO 2 2+

Sorption behavior of γ-irradiated α-Al2O3

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