Cesium sorption on UO2: systematic experimental and model studies for surface sites characterization.

被引：0

作者：

Rodriguez-Villagra, N. ^{[1
,2
]}

Alonso, U. ^{[1
]}

Cobos, J. ^{[1
]}

机构：

[1] Ctr Invest Energet Medioambientales & Tecnol CIEMA, Ave Complutense 40, Madrid 28040, Spain

[2] CSIC, Estn Biol Donana, Ave Americo Vespucio 26, Seville 41092, Spain

来源：

JOURNAL OF NUCLEAR MATERIALS | 2025年 / 606卷

关键词：

Surface sites density; Acid-base titration; Deep geological repository; Spent nuclear fuel; Geological disposal; UO2; URANIUM-OXIDES; ADSORPTION; DENSITIES;

D O I：

10.1016/j.jnucmat.2025.155614

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The maximum sorption capacity of Cs+ onto the powdered UO2 surface, obtained from experimental sorption isotherms (0.1 mol L- 1 NaClO4 at 25 degrees C and pH=6.3), was found to be 6.3 center dot 10- 5 mol center dot g- 1 . Potentiometric titration data, also in 0.1 mol L- 1 NaClO4, were modeled using the double diffuse layer model, yielding acidity constants of pKa1= 3.2 f 0.15 and pKa2=-10.8 f 0.15. The dissolution of UO2 at pH between 2 and 12 was measured at a solid-to-liquid ratio of 40 g center dot L-1 in 0.1 mol L- 1 NaClO4 and the determined solubility product obtained was pK s,U (OH)4 =-(3.2 f 0.2).

引用

页数：4

共 47 条

[31] WATER SORPTION FROM AIR BY CELITE-SUPPORTED CACL2 - MATHEMATICAL-MODEL EXPERIMENTAL STUDIES
HEITI, RV
THODOS, G
AICHE JOURNAL, 1986, 32 (07) : 1169 - 1175
[32] New cyclodiphosph(V)azane complexes of Fe(III), CO(II), Ni(II), Cu(II), Zn(II), and UO2 (II):: Preparation, characterization, and biological activity studies
Mohamed, GG
PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS, 2005, 180 (07) : 1569 - 1586
[33] Can redox sensitive radionuclides be immobilized on the surface of spent nuclear fuel? - A model study on the reduction of Se(IV)aq on Pd-doped UO2 under H2 atmosphere
Puranen, Anders
Trummer, Martin
Jonsson, Mats
JOURNAL OF NUCLEAR MATERIALS, 2009, 392 (03) : 505 - 509
[34] Restructuring in high burn-up pressurized water reactor UO2 fuel central parts: Experimental 3D characterization by focused ion beam-scanning electron microscopy
Noirot, Jean
Dowek, Rebecca
Zacharie-Aubrun, Isabelle
Blay, Thierry
Cabie, Martiane
Dumont, Myriam
JOURNAL OF APPLIED PHYSICS, 2022, 132 (19)
[35] Molten salt flux synthesis and crystal structure of a new open-framework uranyl phosphate Cs3(UO2)2(PO4)O2: Spectroscopic characterization and cationic mobility studies
Yagoubi, S.
Renard, C.
Abraham, F.
Obbade, S.
JOURNAL OF SOLID STATE CHEMISTRY, 2013, 200 : 13 - 21
[36] Synthesis, characterization, theoretical and molecular docking studies of mixed-ligand complexes of Cu(II), Ni(II), Co(II), Mn(II), Cr(III), UO2(II) and Cd(II)
El-Sonbati, A. Z.
Diab, M. A.
Morgan, Sh M.
Abou-Dobara, M., I
El-Ghettany, A. A.
JOURNAL OF MOLECULAR STRUCTURE, 2020, 1200
[37] Antibacterial, antifungal, DNA interactions, and antioxidant evaluation of Cu(II) Co(II), Ni(II), Mn(II) and UO2(II) mixed ligand metal complexes: Synthesis, characterization and molecular docking studies
El-Zahed, M. M.
Diab, M. A.
El-Sonbati, A. Z.
Nozha, S. G.
Issa, H. R.
El-Mogazy, M. A.
Morgan, Sh. M.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS, 2024, 299
[38] Synthesis, characterization, electrical and biological studies of Cr(III), Mn(III), Fe(III), Ti(III), VO(IV), Th(IV), Zr(IV) and UO2(VI) polychelates with bis-bidentate Schiff base
Aswar, AS
Bansod, AD
Aswale, SR
Mandlik, PR
INDIAN JOURNAL OF CHEMISTRY SECTION A-INORGANIC BIO-INORGANIC PHYSICAL THEORETICAL & ANALYTICAL CHEMISTRY, 2004, 43 (09): : 1892 - 1896
[39] Synthesis, characterization and antimicrobial studies of Co(II), Ni(II), Cu(II) Cr(III), Mn(III), Fe(III), VO(IV), Zr(IV) and UO2(VI) with tetradentate schiff base having N2O2 donor group
Kelode, S. R., 1600, Journal of Chemical and Pharmaceutical Research, 3/668 Malviya Nagar, Jaipur, Rajasthan, India (04):
[40] Adsorption and reaction of formic acid on a (2 x 2) NiO(111)/Ni(111) surface. 3. IRAS studies on the characterization of reaction sites using CO and the behavior of surface hydroxyl species
Matsumoto, T
Bandara, A
Kubota, J
Hirose, C
Domen, K
JOURNAL OF PHYSICAL CHEMISTRY B, 1998, 102 (16): : 2979 - 2984

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