Now showing items 1-20 of 30

    • Cadmium and lead removal from aqueous solution by grape stalk wastes: modeling of a fixed-bed column 

      Miralles Esteban, Núria; Valderrama Ángel, César Alberto; Casas Pons, Ignasi; Martínez Martínez, María del Rosario; Florido Pérez, Antonio (2010-09)
      Article
      Open Access
      Grape stalk wastes generated in the wine production process were used for the removal of cadmium and lead ions from aqueous solutions. The experimental breakthrough curves (BTC) were obtained from fixedbed columns. ...
    • Contribution of phases segregated from the UO2 matrix to the release of radionuclides from spent nuclear fuel and duration of the Instant Release Fraction (IRF) 

      Espriu Gascon, Alexandra; Martínez Torrents, Albert; Serrano Purroy, Daniel; Giménez Izquierdo, Francisco Javier; Pablo Ribas, Joan de; Casas Pons, Ignasi (Elsevier, 2020-04-15)
      Article
      Open Access
      During the dissolution of the spent nuclear fuel (SNF) some radionuclides are released to the solution simultaneously from different sources in the fuel. This is of particular importance to some radionuclides that contribute ...
    • Determination of the equilibrium formation constants of two U(VI)-peroxide complexes at alkaline pH 

      Meca, S.; Martínez Torrents, Albert; Martí Gregorio, Vicenç; Giménez Izquierdo, Francisco Javier; Casas Pons, Ignasi; Pablo Ribas, Joan de (2011)
      Article
      Open Access
      The formation of uranyl-peroxide complexes was studied at alkaline media by using UV-Visible spectrophotometry and the STAR code. Two different complexes were found at a H2O2/U(VI) ratio lower than 2. A graphical method ...
    • Dissolution experiments of commercial PWR (52 MWd/kgU) and BWR (53 MWd/kgU) spent nuclear fuel cladded segments in bicarbonate water under oxidizing conditions. Experimental determination of matrix and instant release fraction 

      Gonzalez Robles, E.; Serrano Purroy, D.; Sureda, R.; Casas Pons, Ignasi; Pablo Ribas, Joan de (Elsevier, 2015-10-01)
      Article
      Open Access
      The denominated instant release fraction (IRF) is considered in performance assessment (PA) exercises to govern the dose that could arise from the repository. A conservative definition of IRF comprises the total inventory ...
    • Dissolution of high burn-up spent nuclear fuel at high-pH 

      Iglesias Pérez, Luis; Kokinda, Jakub; Serrano Purroy, Daniel; Martínez Torrents, Albert; Casas Pons, Ignasi; Pablo Ribas, Joan de; Clarens Blanco, Frederic; Giménez Izquierdo, Francisco Javier (De Gruyter, 2023-10-09)
      Article
      Restricted access - publisher's policy
      The release of radionuclides from high-burnup spent nuclear fuel (SNF) segments was studied at pH = 13.2 as well as the effect of the presence of calcium and silicon. The aim was to ascertain the dissolution of SNF in ...
    • Dynamic leaching studies of 48 MWd/kgU UO2 commercial spent nuclear fuel under oxic conditions 

      Serrano Purroy, D.; Casas Pons, Ignasi; Gonzalez Robles, E.; Glatz, Jean Paul; Wegen, D.H.; Clarens Blanco, Frederic; Giménez Izquierdo, Francisco Javier; Pablo Ribas, Joan de; Martínez Esparza, A. (2013-03)
      Article
      Restricted access - publisher's policy
      The leaching of a high-burn-up spent nuclear fuel (48 MWd/KgU) has been studied in a carbonate-containing solution and under oxic conditions using a Continuously Stirred Tank Flow-Through Reactor (CSTR). Two samples of the ...
    • Equilibri iònic i cinètica : problemes 

      Aguilar Sanjuán, Manuel; Casas Pons, Ignasi; Cortina Pallás, José Luís; Farran Marsà, Adriana; Florido Pérez, Antonio; Giménez Izquierdo, Francisco Javier; Martínez Martínez, María del Rosario; Miralles Esteban, Núria; Pablo Ribas, Joan de; Sastre Requena, Ana María (Edicions UPC, 1996)
      Book
      Restricted access to the UPC academic community
      Aquest llibre s'adreça principalment als alumnes que cursen les assignatures Química I, de la titulació d'Enginyeria Industrial, i Equilibris iònics, de la titulació d'Enginyeria Química, ambdues impartides a l'Escola ...
    • Equilibri iònic i cinètica : problemes 

      Aguilar Sanjuán, Manuel; Casas Pons, Ignasi; Cortina Pallás, José Luís; Farran Marsà, Adriana; Florido Pérez, Antonio; Giménez Izquierdo, Francisco Javier; Martínez Martínez, María del Rosario; Miralles Esteban, Núria; Pablo Ribas, Joan de; Sastre Requena, Ana María (Edicions UPC, 2004)
      Book
      Restricted access to the UPC academic community
      Aquest llibre s'adreça principalment als alumnes que cursen les assignatures Química I, de la titulació d'Enginyeria Industrial, i Equilibris iònics, de la titulació d'Enginyeria Química, ambdues impartides a l'Escola ...
    • Equilibri iònic i cinètica : problemes 

      Aguilar Sanjuán, Manuel; Casas Pons, Ignasi; Cortina Pallás, José Luís; Farran Marsà, Adriana; Florido Pérez, Antonio; Giménez Izquierdo, Francisco Javier; Martínez Martínez, María del Rosario; Miralles Esteban, Núria; Pablo Ribas, Joan de; Sastre Requena, Ana María (Edicions UPC, 2003)
      Book
      Restricted access to the UPC academic community
      Aquest llibre s'adreça principalment als alumnes que cursen les assignatures Química I, de la titulació d'Enginyeria Industrial, i Equilibris iònics, de la titulació d'Enginyeria Química, ambdues impartides a l'Escola ...
    • Equilibris químics en dissolució 

      Aguilar Sanjuán, Manuel; Casas Pons, Ignasi; Cortina Pallás, José Luís; Farran Marsà, Adriana; Florido Pérez, Antonio; Giménez Izquierdo, Francisco Javier; Martínez Martínez, María del Rosario; Miralles Esteban, Núria; Pablo Ribas, Joan de; Sastre Requena, Ana María (Edicions UPC, 2005)
      Book
      Restricted access to the UPC academic community
      Aquest llibre s'adreça principalment als alumnes que cursen les assignatures Química I, de la titulació d'Enginyeria Industrial, i Equilibris iònics, de la titulació d'Enginyeria Química, ambdues impartides a l'Escola ...
    • Gd2O3 doped UO2(s) corrosion in the presence of silicate and calcium under alkaline conditions 

      García Gómez, Sonia; Giménez Izquierdo, Francisco Javier; Casas Pons, Ignasi; Llorca Piqué, Jordi; De Pablo Ribas, Joan (Multidisciplinary Digital Publishing Institute (MDPI), 2023-12-01)
      Article
      Open Access
      The anodic reactivity of UO2 and UO2 doped with Gd2O3 was investigated by electrochemical methods in slightly alkaline conditions in the presence of silicate and calcium. At the end of the experiments, the electrodes were ...
    • Incorporation of selenium(IV) and selenium(VI) on uranyl peroxide 

      Martínez Torrents, Albert; Giménez Izquierdo, Francisco Javier; Martínez Lledó, Xavier; Casas Pons, Ignasi; De pablo, J. (2015-01-01)
      Article
      Restricted access - publisher's policy
      © 2014, Akadémiai Kiadó, Budapest, Hungary. The sorption of Se(IV) and Se(VI) on uranium peroxide has been studied considering the sorption kinetics, the sorption isotherms and the effect of pH. Selenium sorption on studtite ...
    • Influence of the interpellet space to the Instant Release Fraction determination of a commercial UO2 Boiling Water Reactor Spent Nuclear Fuel 

      Martínez Torrents, Albert; Serrano Purroy, Daniel; Casas Pons, Ignasi; Pablo Ribas, Joan de (Elsevier, 2018-02)
      Article
      Open Access
      The contact of the coolant with the fuel pin during irradiation produces a gradient of temperature in the fuel pellet that segregates the radionuclides (RN) depending on its volatility and reactivity. This segregation ...
    • Instant release fraction corrosion studies of commercial UO2 BWR spent nuclear fuel 

      Martínez Torrents, Albert; Serrano Purroy, Daniel; Sureda, R.; Casas Pons, Ignasi; Pablo Ribas, Joan de (Elsevier, 2017-05-01)
      Article
      Open Access
      The instant release fraction of a spent nuclear fuel is a matter of concern in the performance assessment of a deep geological repository since it increases the radiological risk. Corrosion studies of two different spent ...
    • Molybdenum release from high burnup spent nuclear fuel at alkaline and hyperalkaline pH 

      García Gómez, Sonia; Giménez Izquierdo, Francisco Javier; Casas Pons, Ignasi; Llorca Piqué, Jordi; Pablo Ribas, Joan de; Martínez Torrents, Albert; Clarens Blanco, Frederic; Kokinda, Jakub; Iglesias Pérez, Luis; Serrano Purroy, Daniel (Elsevier, 2023-01-01)
      Article
      Open Access
      This work presents experimental data and modelling of the release of Mo from high-burnup spent nuclear fuel (63 MWd/kgU) at two different pH values, 8.4 and 13.2 in air. The release of Mo from SF to the solution is around ...
    • Oxidation by H2O(g) in the presence of H2(g) of UO2 doped with Pd nanoparticles 

      Espriu Gascon, Alexandra; Llorca Piqué, Jordi; Domínguez Escalante, Montserrat; Giménez Izquierdo, Francisco Javier; Casas Pons, Ignasi; Pablo Ribas, Joan de (2018-09-28)
      Article
      Open Access
      This work studies the influence of epsilon particles and metallic precipitates, simulated through the deposition of Pd nanoparticles on non-irradiated UO2, on the oxidation of the spent nuclear fuel (SNF). The presence of ...
    • Oxidative dissolution mechanism of both undoped and Gd2O3-doped UO2(s) at alkaline to hyperalkaline pH† 

      García Gómez, Sonia; Casas Pons, Ignasi; Llorca Piqué, Jordi; de Pablo, Joan; Giménez Izquierdo, Francisco Javier (Royal Society of Chemistry (RSC), 2023)
      Article
      Open Access
      The dissolution rates of unirradiated UO2 and unirradiated UO2 doped with Gd2O3 were determined as a function of pH using flow-through experiments in the presence of O2(g) and bicarbonate. The dissolution rate of non-doped ...
    • Preparation and characterisation of Pd nanoparticles doped UO2 samples 

      Espriu Gascon, Alexandra; Bastos Arrieta, Julio Alonso; Giménez Izquierdo, Francisco Javier; Casas Pons, Ignasi; Pablo Ribas, Joan de (2016-01-01)
      Article
      Open Access
      To assess the safety of the deep geological disposal that would store the spent nuclear fuel (SNF), studies are centred on the SNF behaviour under repository conditions. UO2, which is the most common compound of SNF matrix, ...
    • Retention of cesium and strontium by uranophane, Ca(UO2)2(SiO3OH)2·5H2O 

      Espriu Gascon, Alexandra; Giménez Izquierdo, Francisco Javier; Casas Pons, Ignasi; Pablo Ribas, Joan de (2018-07-05)
      Article
      Open Access
      This work determines the capacity of uranophane, one of the long-term uranyl secondary solid phases formed on the spent nuclear fuel (SNF), to retain radionuclides (cesium and strontium) released during the dissolution of ...
    • Secondary phase formation on UO2 in phosphate media 

      Rey, A.; Giménez Izquierdo, Francisco Javier; Casas Pons, Ignasi; Clarens, F.; De Pablo Ribes, Joan (2008-04-08)
      Article
      Restricted access - publisher's policy
      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 ...