The thermodynamics and kinetics of uranophane dissolution in bicarbonate test solutions

Geochimica et Cosmochimica Acta

Volumn 64, Issue 4, 2000, Pages 603-608

  Pérez, Isabel ^a   Casas, Ignasi ^a   Martín, Maria ^a   Bruno, Jordi ^b  

^a UNIVERSITAT POLITÈCNICA DE CATALUNYA   (Spain)

^b QuantiSci SL   (Spain)

Author keywords

[No Author keywords available]

Indexed keywords

DISSOLUTION; REACTION KINETICS; THERMODYNAMICS; URANINITE; URANIUM; WEATHERING;

EID: 0342657122     PISSN: 00167037     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0016-7037(99)00337-3     Document Type: Article

References (16)

1. Bruno J., Sandino A. The solubility of amorphous and crystalline schoepite in neutral to alkaline aqueous solutions. Mat. Res. Soc. Symp. Proc. 127:1989;871-878.
2. 2+x): Application of a continuous flow-through reactor. Geochim. Cosmochim. Acta. 55:1991;647-658.
3. Casas I., Bruno J., Cera E., Finch R. J., and Ewing R. C. (1994) Kinetic and thermodynamic studies of uranium minerals. Assessment of the long-term evolution of spent nuclear fuel. SKB Technical Report 94-16.
4. Casas I., Bruno J., Cera E., Finch R.J., Ewing R.C. Characterization and dissolution behavior of a becquerelite from Shinkolobwe, Zaire. Geochim. Cosmochim. Acta. 61:1997;3879-3884.
5. Casas I., Pérez I., Torrero E., Bruno J., Cera E., and Duro L. (1997) Dissolution studies of synthetic soddyite and uranophane. SKB Technical Report 97-15.
6. 2 and uraninite under nominally reducing conditions. Geochim. Cosmochim. Acta. 62:1998;2223-2231.
7. Chen F., Ewing R.C., Clark S.B. The Gibbs free energies and enthalpies of formation of uranium (VI) phases An empirical method of prediction . Amer. Mineral. 84:1999;650-664.
8. Grenthe I., Fuger J., Konings R. J. M., Lemire R. J., Muller A. B., Nguyen-Trung C., and Wanner H. (1992) In Chemical Thermodynamics of Uranium (ed. Hans Wanner and Isabelle Forest). Elsevier.
9. Lasaga A.C. Rate laws of chemical reactions. Lasaga A.C., Kirkpatrick R.J. Kinetics of Geochemical Processes. 1983;Mineralogical Society of America.
10. Nguyen N., Silva R.J., Weed H.C., Andrews J.E. Jr. Standard Gibbs free energies of formation at the temperature 303.15 K of four uranyl silicates Soddyite, uranophane, sodium boltwoodite, and sodium weeksite . J. Chem. Thermodynamics. 24:1992;359-376.
11. Pérez I., Casas I., Torrero M.E., Cera E., Duro L., Bruno J. Dissolution studies of soddyite as a long-term analogue of the oxidative alteration of the spent nuclear fuel matrix. Mat. Res. Soc. Symp. Proc. 465:1997;565-572.
12. Robbins J.C. Field techniques for the measurement of uranium in natural waters. Can. Inst. Mining Metall. Bull. 71:1978;61-67.
13. Robbins J. C., Castledine C., and Kostiak W. (1985) Analytical Procedures for UA-3 Uranium Analysis. SCINTREX Limited.
14. 2O system Transformation of schoepite into becquerelite and compreignacite . Radiochim. Acta. 66/67:1994;37-43.
15. Smith D.K. Jr. Uranium mineralogy. DeVivo B., Ippolito F., Capaldi G., Simpson P.R. Uranium Geochemistry, Mineralogy, Geology, Exploration and Resources. 1984;43-88 Institute of Mining and Metallurgy.
16. Wieland E., Wehrli B., Stumm W. The coordination chemistry of weathering III. A generalization on the dissolution rate of minerals . Geochim. Cosmochim. Acta. 52:1988;1969-1981.