title: Effects of the different conditions of uranyl and hydrogen peroxide solutions on the behavior of the uranium peroxide precipitation.
abstract: The dynamic precipitation characteristics of UO(4) in different solution conditions (pH, ionic strength, uranium and H(2)O(2) concentrations) were characterized by measuring changes in the absorbance of the precipitation solution and by monitoring the change of particle size in a circulating particle size analyzer. The precipitation solution conditions affected the precipitation characteristics such as the induction time, precipitation rate, overall precipitation time, and particle size in a complex manner. With increases in both pH and ionic strength, the induction time was prolonged, and the individual particle size decreased, but the individual particles tended to grow by aggregation to form larger precipitates. The uranium concentration and the ionic strength of the solution affected the induction time and precipitation rate to the greatest extent.
authors.affiliation: Korea Atomic Energy Research Institute, 1045 Daedeok daero, Yuseong, Daejeon 305-353, Republic of Korea. nkwkim@kaeri.re.kr
authors.forename: Kwang-Wook
authors.initials: KW
authors.lastname: Kim
authors.forename: Jun-Taek
authors.initials: JT
authors.lastname: Hyun
authors.forename: Keun-Young
authors.initials: KY
authors.lastname: Lee
authors.forename: Eil-Hee
authors.initials: EH
authors.lastname: Lee
authors.forename: Kune-Woo
authors.initials: KW
authors.lastname: Lee
authors.forename: Kee-Chan
authors.initials: KC
authors.lastname: Song
authors.forename: Jei-Kwon
authors.initials: JK
authors.lastname: Moon
mesh_terms: D006861:Hydrogen Peroxide / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D010316:Particle Size; D012996:Solutions; D017974:Uranium Compounds / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D012996:Solutions; D017974:Uranium Compounds; C114698:uranium peroxide; D006861:Hydrogen Peroxide