Exploració per autor "Pablo Ribas, Joan de"
Ara es mostren els items 29-47 de 47
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Oxidation by H2O(g) in the presence of H2(g) of UO2 doped with Pd nanoparticles
(2018-09-28)
Article
Accés obertThis 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
(2012-08-06)
Article
Accés restringit per política de l'editorialA 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
(2016-01-01)
Article
Accés obertTo 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
(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
(2018-07-05)
Article
Accés obertThis 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
(2021-07-01)
Article
Accés obertSorption 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
(Elsevier, 2011-02-28)
Article
Accés restringit per política de l'editorialHerein 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
(2011-01-15)
Article
Accés restringit per política de l'editorialThe 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
(2008-06)
Article
Accés restringit per política de l'editorialThe 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
(Elsevier, 2008-01)
Article
Accés restringit per política de l'editorialSelenium 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
(Elsevier, 2010-09-15)
Article
Accés restringit per política de l'editorialStrontium-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
(2017-06)
Article
Accés restringit per política de l'editorialA 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 ... -
The use of apatite II (TM) to remove divalent metal ions zinc (II), lead (II), manganese (II) and iron (II) from water in passive treatment systems: column experiments
(Elsevier, 2010-12-15)
Article
Accés obert -
UO2 as new filling material for cesium retention in high-level nuclear waste repositories
(2015-10-01)
Article
Accés obertDepleted 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
(Elsevier, 2015-12-01)
Article
Accés obertIn 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
(2012-03)
Article
Accés restringit per política de l'editorialLarge 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
(2013-05)
Article
Accés restringit per política de l'editorialTime-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 ... -
Water-air volatilization factors to determine volatile organic compound (VOC) reference levels in water
(2014-06-11)
Article
Accés obertThe goal of this work is the modeling and calculation of volatilization factors (VFs) from water to air for volatile organic compounds (VOCs) in order to perform human health risk - base d reference levels (RLs) ... -
X-ray photoelectron spectroscopy (XPS) study of surface oxidation of UO2 doped with Gd2O3 at different temperatures and atmospheres
(2023-08)
Article
Accés obertIn 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 ...
