title: Colloid stable sorbents for cesium removal: preparation and application of latex particles functionalized with transition metals ferrocyanides.
abstract: In this paper we suggest a principally new approach to preparation of colloid stable selective sorbents for cesium uptake using immobilization of transition metals (cobalt, nickel, and copper) ferrocyanides in nanosized carboxylic latex emulsions. The effects of ferrocyanide composition, pH, and media salinity on the sorption properties of the colloid stable sorbents toward cesium ions were studied in solutions containing up to 200 g/L of sodium nitrate or potassium chloride. The sorption capacities of the colloid sorbents based on mixed potassium/transition metals ferrocyanides were in the range 1.3-1.5 mol Cs/mol ferrocyanide with the highest value found for the copper ferrocyanide. It was shown that the obtained colloid-stable sorbents were capable to penetrate through bulk materials without filtration that made them applicable for decontamination of solids, e.g. soils, zeolites, spent ion-exchange resins contaminated with cesium radionuclides. After decontamination of liquid or solid radioactive wastes the colloid-stable sorbents can be easily separated from solutions by precipitation with cationic flocculants providing localization of radionuclides in a small volume of the precipitates formed.
authors.affiliation: Institute of Chemistry, Far Eastern Branch, Russian Academy of Sciences, 159 ave 100-letiya Vladivostoka, Vladivostok 690022, Russia.
authors.forename: Valentin
authors.initials: V
authors.lastname: Avramenko
authors.forename: Svetlana
authors.initials: S
authors.lastname: Bratskaya
authors.forename: Veniamin
authors.initials: V
authors.lastname: Zheleznov
authors.forename: Irina
authors.initials: I
authors.lastname: Sheveleva
authors.forename: Oleg
authors.initials: O
authors.lastname: Voitenko
authors.forename: Valentin
authors.initials: V
authors.lastname: Sergienko
mesh_terms: D000327:Adsorption; D000465:Algorithms; D002586:Cesium / Q000302:isolation & purification*; D002588:Cesium Radioisotopes / Q000737:chemistry / Q000302:isolation & purification; D003035:Cobalt / Q000737:chemistry; D003102:Colloids / Q000737:chemistry*; D003188:Composite Resins; D003300:Copper / Q000737:chemistry; D004563:Electrochemistry; D004655:Emulsions; D005295:Ferrocyanides / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007840:Latex / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D053758:Nanoparticles / Q000737:chemistry; D009532:Nickel / Q000737:chemistry; D010316:Particle Size; D016062:Porosity; D012833:Siloxanes / Q000737:chemistry; D013816:Thermodynamics; D028561:Transition Elements / Q000737:chemistry*
chemical_list: D002588:Cesium Radioisotopes; D003102:Colloids; D003188:Composite Resins; D004655:Emulsions; D005295:Ferrocyanides; D007840:Latex; D012833:Siloxanes; D028561:Transition Elements; D002586:Cesium; D003035:Cobalt; D003300:Copper; D009532:Nickel