Exploració per autor "Pablo Ribas, Joan de"Més informacióMés informació

Ara es mostren els items 21-40 de 47

    • 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
      Accés obert
      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
      Accés obert
      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 ...

    • Investigation of the dielectric properties of nanofiltration membranes 

      Oatley, Darren Lee; Llenas Argelaguet, Laia; Aljohani, Nasser H M; Williams, Paul Melvyn; Martínez Lladó, Xavier; Rovira Boixaderas, Miquel; Pablo Ribas, Joan de (2013-04-15)
      Article
      Accés restringit per política de l'editorial
      Membrane nanofiltration is extremely complex and is dependent on the micro-hydrodynamics and interfacial events occurring at the membrane surface and within the membrane nanopores. There is significant debate as to the ...

    • Leaching behaviour of magnesium phosphate cements containing high quantities of heavy metals 

      Buj Corral, Irene; Torras Grané, Josep; Rovira Boixaderas, Miquel; Pablo Ribas, Joan de (Elsevier, 2009-10-30)
      Article
      Accés restringit per política de l'editorial
      Stabilization/solidification (S/S) is one of the most employed techniques for treating liquid wastes containing heavy metals. Magnesium potassium phosphate cements have been used in recent years as stabilizing agents with ...

    • Litoral Besós: sistema técnico y social como soporte inteligente y sostenible 

      Ramírez Agudelo, Nancy Andrea; Roca Bosch, Elisabet; Pablo Ribas, Joan de (Fundación Conama, 2018)
      Comunicació de congrés
      Accés obert
      Un argumento común en la regeneración urbana es abordar las presiones sobre los recursos y los desafíos de la urbanización a través del desarrollo tecnológico, mejorando la eficiencia y los problemas de optimización, tal ...

    • Modelling enhanced groundwater denitrification in batch micrococosm tests 

      Calderer, M.; Jubany, Irene; Pérez Magrané, Ramon; Martí Gregorio, Vicenç; Pablo Ribas, Joan de (2010)
      Article
      Accés restringit per política de l'editorial
      In the last few years, enhanced in situ denitrification has gained a lot of interest as a reliable bioremediation option to remove nitrate from groundwater. However, denitrification modelling in the subsurface environment ...

    • Modelling the release of Mo, Tc, Ru and Rh from high burnup spent nuclear fuel at alkaline and hyperalkaline pH 

      Giménez Izquierdo, Francisco Javier; Pablo Ribas, Joan de; García Gómez, Sonia; Serrano Purroy, Daniel; Iglesias Pérez, Luis; Clarens Blanco, Frederic; Martínez Torrents, Albert (Cambridge University Press, 2023-12-30)
      Article
      Accés obert
      The present work shows experimental data on the release of some radionuclides that are forming the so-called e particles in the spent nuclear fuel (SNF): Mo, Tc, Ru and Rh. The leaching experiments were carried out with a ...

    • 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
      Accés obert
      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
      Accés obert
      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 ...

    • Pilot plant comparison study of two commercial nanofiltration membranes in a drinking water treatment plant 

      Ribera, Gemma; Llenas Argelaguet, Laia; Rovira, Miquel; Pablo Ribas, Joan de; Martínez Lladó, Xavier (2012-08-06)
      Article
      Accés restringit per política de l'editorial
      A wide range of commercial membranes were tested and compared at laboratory scale in order to select the most appropriate for improving the final water quality of a real drinking water treatment plant (DWTP). Most of the ...

    • 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
      Accés obert
      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, ...

    • Removal of cadmium, copper, nickel, cobalt and mercury from water by Apatite IITM: column experiments 

      Oliva Moncunill, Josep; Pablo Ribas, Joan de; Cortina Pallás, José Luís; Cama, Jordi; Ayora Ibáñez, Carlos (Elsevier, 2011-10-30)
      Article
      Accés restringit per política de l'editorial

    • 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
      Accés obert
      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 ...

    • Se(IV) immobilization onto natural siderite: implications for high-level nuclear waste repositories 

      Pavón Regaña, Sandra; Pablo Ribas, Joan de (2021-07-01)
      Article
      Accés obert
      Sorption processes of metals and semimetals on siderite are studied because of its potential adequacy for removing contaminants from natural waters and its wide availability, as well as its capacity to reduce the oxidation ...

    • Semi-dynamic leaching tests of nickel containing wastes stabilized/solidified with magnesium potassium phosphate cements 

      Torras Grané, Josep; Buj Corral, Irene; Rovira Boixaderas, Miquel; Pablo Ribas, Joan de (Elsevier, 2011-02-28)
      Article
      Accés restringit per política de l'editorial
      Herein is presented a study on the long-term leaching behaviour of nickel containing wastes stabilized/solidified with magnesium potassium phosphate cements. Two different semi-dynamic leaching tests were carried out on ...

    • Sorption and mobility of Sb(V) in calcareous soils of Catalonia (NE Spain): Batch and column experiments 

      Martínez Lladó, Xavier; Valderrama Ángel, César Alberto; Rovira Boixaderas, Miquel; Martí Gregorio, Vicenç; Giménez Izquierdo, Francisco Javier; Pablo Ribas, Joan de (2011-01-15)
      Article
      Accés restringit per política de l'editorial
      The sorption of Sb(V) onto natural calcareous soils was studied in batch and column experiments as a function of physicochemical properties of the soil, namely: organic matter, the active fraction of Fe and Al and the pH ...

    • Sorption of antimony (V) onto synthetic goethite in carbonate medium 

      Martinez-Llado, X; Martínez Lladó, Xavier; Pablo Ribas, Joan de; Giménez Izquierdo, Francisco Javier; Ayora Ibáñez, Carlos; Martí Gregorio, Vicenç; Rovira Boixaderas, Miquel (2008-06)
      Article
      Accés restringit per política de l'editorial
      The sorption kinetics of antimony(V) on synthetic goethite is very fast compared to the sorption of other metals on goethite (e.g. arsenic and selenium) and depends on temperature, with an activation energy of 49+9 kJ . ...

    • Sorption of selenium(IV) and selenium(VI) onto natural iron oxides: Goethite and hematite 

      Rovira Boixaderas, Miquel; Giménez Izquierdo, Francisco Javier; Martínez Martínez, María del Rosario; Martí Gregorio, Vicenç; Pablo Ribas, Joan de; Martinez-Llado, X; Duro, L (Elsevier, 2008-01)
      Article
      Accés restringit per política de l'editorial
      Selenium is a toxic element with a relatively high mobility in the natural waters. Iron oxy-hydroxides might play an important role in the migration of this element as well as on its removal from contaminated water. In ...

    • 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 ...

    • Summary of the euratom collaborative project FIRST-nuclides and conclusions for the safety case 

      Kienzler, B.; Duro, L.; Lemmens, K.; Metz, V.; Pablo Ribas, Joan de; Valls, A.; Wegen, D.H.; Johnson, L.; Spahiu, K. (2017-06)
      Article
      Accés restringit per política de l'editorial
      A consortium of 10 partners from seven European countries and the European Commission collaborated in investigating the short-term release of radionuclides from disposed spent nuclear fuel upon canister failure. The ...