title: Ionosilicas as efficient sorbents for anionic contaminants: Radiolytic stability and ion capacity.
abstract: Ammonium based hybrid ionosilicas were prepared from tetrasilylated ammonium precursors. The formed material exhibited high specific surface area together with mesoporosity. Our results indicate that ionosilicas display high exchange capacity for iodide. They were submitted to 10MeV electron irradiation at a total dose of 1.7MGy. Irradiation was shown not to alter the properties of ionosilica: the morphological, textural and surface properties of the material are hardly modified. The sorption properties (sorption capacity and cumulative displacement enthalpy) are similar before and after electron irradiation. This high radiolytical stability confirms that these innovative materials have therefore high potential as anion traps for future applications in decontamination processes or long term storage of radioactive waste.
authors: Institut Charles Gerhardt de Montpellier, UMR 5253 CNRS-UM-ENSCM, Université de Montpellier, Place Eugène Bataillon, 34095 Montpellier cedex 05, France. Electronic address: Ut-Dong.Thach@etud.univ-montp2.fr.
authors: Ut Dong
authors: UD
authors: Thach
authors: Institut Charles Gerhardt de Montpellier, UMR 5253 CNRS-UM-ENSCM, Université de Montpellier, Place Eugène Bataillon, 34095 Montpellier cedex 05, France. Electronic address: peter.hesemann@umontpellier.fr.
authors: Peter
authors: P
authors: Hesemann
authors: LIONS, NIMBE, UMR 3685, CEA, CNRS, Université Paris-Saclay, CEA Saclay Bât. 546, F-91191 Gif-sur-Yvette Cedex, France. Electronic address: guangze.yang@cea.fr.
authors: Guangze
authors: G
authors: Yang
authors: Institut Charles Gerhardt de Montpellier, UMR 5253 CNRS-UM-ENSCM, Université de Montpellier, Place Eugène Bataillon, 34095 Montpellier cedex 05, France. Electronic address: amine.geneste@um2.fr.
authors: Amine
authors: A
authors: Geneste
authors: LIONS, NIMBE, UMR 3685, CEA, CNRS, Université Paris-Saclay, CEA Saclay Bât. 546, F-91191 Gif-sur-Yvette Cedex, France. Electronic address: sophie.le-caer@cea.fr.
authors: Sophie
authors: S
authors: Le Caër
authors: Institut Charles Gerhardt de Montpellier, UMR 5253 CNRS-UM-ENSCM, Université de Montpellier, Place Eugène Bataillon, 34095 Montpellier cedex 05, France. Electronic address: benedicte.prelot@umontpellier.fr.
authors: Benedicte
authors: B
authors: Prelot
keywords: Calorimetry; Iodide sorption; Ionosilica; Pollution remediation; Radiolytic stability