title: Decontamination of spent ion-exchangers contaminated with cesium radionuclides using resorcinol-formaldehyde resins.
abstract: The origin of the emergence of radioactive contamination not removable in the process of acid-base regeneration of ion-exchange resins used in treatment of technological media and liquid radioactive waste streams has been determined. It has been shown that a majority of cesium radionuclides not removable by regeneration are bound to inorganic deposits on the surface and inside the ion-exchange resin beads. The nature of the above inorganic inclusions has been investigated by means of the methods of electron microscopy, IR spectrometry and X-ray diffraction. The method of decontamination of spent ion-exchange resins and zeolites contaminated with cesium radionuclides employing selective resorcinol-formaldehyde resins has been suggested. Good prospects of such an approach in deep decontamination of spent ion exchangers have been demonstrated.
authors.affiliation: Institute of Chemistry, Far-Eastern Branch, Russian Academy of Sciences, 159, prosp. 100-letiya Vladivostoka, Vladivostok 690022, Russia. Electronic address: marina_p@ich.dvo.ru.
authors.forename: Marina
authors.initials: M
authors.lastname: Palamarchuk
authors.affiliation: Institute of Chemistry, Far-Eastern Branch, Russian Academy of Sciences, 159, prosp. 100-letiya Vladivostoka, Vladivostok 690022, Russia.
authors.forename: Andrey
authors.initials: A
authors.lastname: Egorin
authors.affiliation: Institute of Chemistry, Far-Eastern Branch, Russian Academy of Sciences, 159, prosp. 100-letiya Vladivostoka, Vladivostok 690022, Russia.
authors.forename: Eduard
authors.initials: E
authors.lastname: Tokar
authors.affiliation: Institute of Chemistry, Far-Eastern Branch, Russian Academy of Sciences, 159, prosp. 100-letiya Vladivostoka, Vladivostok 690022, Russia.
authors.forename: Mikhail
authors.initials: M
authors.lastname: Tutov
authors.affiliation: Institute of Chemistry, Far-Eastern Branch, Russian Academy of Sciences, 159, prosp. 100-letiya Vladivostoka, Vladivostok 690022, Russia.
authors.forename: Dmitry
authors.initials: D
authors.lastname: Marinin
authors.affiliation: Institute of Chemistry, Far-Eastern Branch, Russian Academy of Sciences, 159, prosp. 100-letiya Vladivostoka, Vladivostok 690022, Russia.
authors.forename: Valentin
authors.initials: V
authors.lastname: Avramenko
keywords: Cesium; Radioactive waste; Resorcinol-formaldehyde resin; Spent ion-exchange resin; Spent zeolite