THE THERMODYNAMICS AND KINETICS OF URANOPHANE DISSOLUTION IN BICARBONATE TEST SOLUTIONS
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dc.contributor.author | Perez I. | |
dc.contributor.author | Casas I. | |
dc.contributor.author | Martn M. | |
dc.contributor.author | Bruno J. | |
dc.date.accessioned | 2021-01-22T05:12:21Z | |
dc.date.available | 2021-01-22T05:12:21Z | |
dc.date.issued | 2000 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=207643 | |
dc.identifier.citation | Geochimica et Cosmochimica Acta, 2000, 64, 4, 603-608 | |
dc.identifier.issn | 0016-7037 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/23484 | |
dc.description.abstract | The thermodynamic and kinetic properties of a synthetic uranophane (Ca(H3O)2(UO2)2(SiO4)2 . 3H2O) have been determined from dissolution experiments in test solutions of different bicarbonate concentrations at 25°C. The experiments were performed using batch and continuously stirred tank flow-through reactors. From the experimental data obtained with the batch reactor the solubility constant for the reaction: Ca(H3O)2(UO2)2(SiO4)2 . 3H2O + 6H3O+ # Ca+2 + 2UO2+2 + 2H4SiO4 + 11H2O was determined to be log Ks00 = 11.7 +/- 0.6 and the rate equation for the dissolution process is log rdissol (mol s-1 m-2) = -8.3 (+/-0.6) + 0.7 (+/-0.3) log [HCO3-]. By using the continuously stirred tank flow-through reactor we obtained a rate equation in reasonably good agreement with that obtained in the batch reactor: log rdissol (mol s-1 m-2) = -9.2 (+/-0.4) + 0.7 (+/-0.2) log [HCO3-]. | |
dc.title | THE THERMODYNAMICS AND KINETICS OF URANOPHANE DISSOLUTION IN BICARBONATE TEST SOLUTIONS | |
dc.type | Статья |
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