Ara es mostren els items 20-30 de 30

    • 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
      Accés restringit per política de l'editorial
      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 ...
    • Solubility study and point of zero charge of studtite (UO2O2 center dot 4H(2)O) 

      Giménez Izquierdo, Francisco Javier; De Pablo, Joan; Casas Pons, Ignasi; Martínez Lladó, Xavier; Rovira Boixaderas, Miquel; Martinez Torrents, A (2014-10-01)
      Article
      Accés restringit per política de l'editorial
      The knowledge of the characteristics of the U(VI)-peroxide chemical system is of importance because of the relevance of the uranyl peroxide solid phases studtite (UO2O2 center dot 4H(2)O) or metastudtite (UO2O2 center dot ...
    • Sorption of strontium on uranyl peroxide: implications for a high-level nuclear waste repository 

      Sureda Pastor, Rosa María; Martínez Lladó, Xavier; Rovira Boixaderas, Miquel; Pablo Ribas, Joan de; Casas Pons, Ignasi; Giménez Izquierdo, Francisco Javier (Elsevier, 2010-09-15)
      Article
      Accés restringit per política de l'editorial
      Strontium-90 is considered the most important radioactive isotope in the environment and one of the most frequently occurring radionuclides in groundwaters at nuclear facilities. The uranyl peroxide studtite (UO2O2 center ...
    • Strategies for surface modification with Ag-shaped nanoparticles: electrocatalytic enhancement of screen-printed electrodes for the detection of heavy metals 

      Torres Rivero Andrade, Karina Victoria Alejandra; Torralba Cadena, Lourdes; Espriu Gascon, Alexandra; Casas Pons, Ignasi; Bastos Arrieta, Julio Alonso; Florido Pérez, Antonio (Multidisciplinary Digital Publishing Institute (MDPI), 2019-09-30)
      Article
      Accés obert
      Screen-printed carbon nanofiber electrodes (SPCNFEs) represent an alternative with great acceptance due to their results, as well as their low impact on the environment. In order to improve their performance, in the present ...
    • UO2 as new filling material for cesium retention in high-level nuclear waste repositories 

      Martínez Torrents, Albert; Gimenez, Javier; Pablo Ribas, Joan de; Casas Pons, Ignasi (2015-10-01)
      Article
      Accés obert
      Depleted uranium dioxide has been proposed as an inert material to fill spent nuclear fuel canisters in geological repositories. Sorption capacity of this material to retain radionuclides released from the fuel was determined. ...
    • UO2 surface oxidation by mixtures of water vapor and hydrogen as a function of temperature 

      Espriu Gascon, Alexandra; Llorca Piqué, Jordi; Domínguez Escalante, Montserrat; Giménez Izquierdo, Francisco Javier; Casas Pons, Ignasi; Pablo Ribas, Joan de (Elsevier, 2015-12-01)
      Article
      Accés obert
      In the present work, X-Ray Photoelectron Spectroscopy (XPS) was used to study the effect of water vapor on the UO2 surface as a function of temperature. The experiments were performed in situ inside a high pressure chamber ...
    • Uranium speciation in river sediments contaminated by phosphate ores 

      Meca, S.; Giménez Izquierdo, Francisco Javier; Casas Pons, Ignasi; Martí Gregorio, Vicenç; Pablo Ribas, Joan de (2012-03)
      Article
      Accés restringit per política de l'editorial
      Large amounts of phosphate ores with high concentrations of uranium were dumped by a phosphate plant into the Flix water reservoir in the Ebre River, Catalonia, NE Spain. These phosphate wastes have been mixed over the ...
    • Uranium speciation studies at alkaline pH and in the presence of hydrogen peroxide using time-resolved laser-induced fluorescence spectroscopy 

      Martínez Torrents, Albert; Meca, Sandra; Baumann, Nils; Martí Gregorio, Vicenç; Giménez Izquierdo, Francisco Javier; Pablo Ribas, Joan de; Casas Pons, Ignasi (2013-05)
      Article
      Accés restringit per política de l'editorial
      Time-resolved laser-induced fluorescence spectroscopy (TRLFS) was used to study the speciation of uranium(VI) at very alkaline pH (11–13), at room temperature and in the absence of CO2. In this case, at pH = 11, two different ...
    • Valorització de residus vegetals procedents de processos industrials com a biosorbents per a l'eliminació d'ions metàl•lics d'afluents aquosos 

      Villaescusa Gil, Isabel; Miralles Esteban, Núria; Martínez Martínez, María del Rosario; Florido Pérez, Antonio; Fiol Santaló, Núria; Casas Pons, Ignasi (Centre per a la Sostenibilitat, 2007-07-12)
      Text en actes de congrés
      Accés obert
      L’objectiu d’aquest projecte és la valorització de residus vegetals procedents de processos industrials, com són el pinyol d’oliva, rapa del raïm, suro, marro de cafè, etc.,com a biosorbents per a l’eliminació de diferents ...
    • VLAB3D a l'aprenentatge per la pràctica simulació virtual i interactiva en 3D d'un laboratori de química 

      Casas Pons, Ignasi; Aguilar Sanjuán, Manuel (2006-02)
      Text en actes de congrés
      Accés obert
      A partir de la idea inicial que teníem de millorar la simulació virtual el treball pràctic de laboratori de química dels alumnes, hem desenvolupat un programa informàtic en el que l´alumne se situa en un entorn virtual ...
    • X-ray photoelectron spectroscopy (XPS) study of surface oxidation of UO2 doped with Gd2O3 at different temperatures and atmospheres 

      García Gómez, Sonia; Giménez Izquierdo, Francisco Javier; Casas Pons, Ignasi; Llorca Piqué, Jordi; Pablo Ribas, Joan de (2023-08)
      Article
      Accés obert
      In this work, the influence of GdIII doping on the surface oxidation of UO2 has been investigated in situ by XPS. The samples were put in contact with either hydrogen, argon or synthetic air streams saturated with water ...