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Secondary phase formation on UO2 in phosphate media
dc.contributor.author | Rey, A. |
dc.contributor.author | Giménez Izquierdo, Francisco Javier |
dc.contributor.author | Casas Pons, Ignasi |
dc.contributor.author | Clarens, F. |
dc.contributor.author | De Pablo Ribes, Joan |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament d'Enginyeria Química |
dc.date.accessioned | 2013-04-05T11:20:49Z |
dc.date.created | 2008-04-08 |
dc.date.issued | 2008-04-08 |
dc.identifier.citation | Rey, A. [et al.]. Secondary phase formation on UO2 in phosphate media. "Applied geochemistry", 08 Abril 2008, vol. 23, núm. 8, p. 2249-2255. |
dc.identifier.issn | 0883-2927 |
dc.identifier.uri | http://hdl.handle.net/2117/18643 |
dc.description.abstract | he dissolution of UO2 (a chemical analog of uraninite and of spent nuclear fuel) has been studied by using a flow-through reactor. The UO2 dissolution rates at total View the MathML source concentrations of 10−4, 10−5, and 10−6 mol dm−3 have been determined to be: 1.3 × 10−10 mol m−2 s−1, 6.7 × 10−11 mol m−2 s−1, and 2.0 × 10−11 mol m−2 s−1, respectively. The dissolution rates determined are found to be higher than the ones determined for similar carbonate concentrations. Moreover, the surface of the UO2 has been studied in static tests by means of the scanning force microscopy technique (SFM) in order to follow the formation of any secondary solid phase on its surface. The formation of chernikovite (H2(UO2)2(PO4)2 · 8H2O) has been observed at a 10−4 M total View the MathML source concentration, while no uranyl-phosphate secondary phases have been found at lower View the MathML source concentrations. In experiments performed in the presence of both carbonate and phosphate, no precipitation of secondary phases has been observed. It is postulated that this is due to the formation of the highly stable uranyl-carbonate complexes in solution. |
dc.format.extent | 7 p. |
dc.language.iso | eng |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Spain |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
dc.subject | Àrees temàtiques de la UPC::Enginyeria química |
dc.subject.lcsh | Geochemistry |
dc.title | Secondary phase formation on UO2 in phosphate media |
dc.type | Article |
dc.subject.lemac | geoquimica |
dc.contributor.group | Universitat Politècnica de Catalunya. SETRI - Grup de Tècniques de Separació i Tractament de Residus Industrials |
dc.identifier.doi | 10.1016/j.apgeochem.2008.03.008 |
dc.description.peerreviewed | Peer Reviewed |
dc.rights.access | Restricted access - publisher's policy |
local.identifier.drac | 11703624 |
dc.description.version | Postprint (published version) |
dc.date.lift | 10000-01-01 |
local.citation.author | Rey, A.; Gimenez, F.; Casas, I.; Clarens, F.; De Pablo, J. |
local.citation.publicationName | Applied geochemistry |
local.citation.volume | 23 |
local.citation.number | 8 |
local.citation.startingPage | 2249 |
local.citation.endingPage | 2255 |
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