title: Adsorption and separation behavior of yttrium and strontium in nitric acid solution by extraction chromatography using a macroporous silica-based adsorbent.
abstract: To separate (90)Y from the fission product (90)Sr-(90)Y group, a silica-based TODGA/SiO(2)-P adsorbent was prepared by impregnating N,N,N',N'-tetraoctyl-3-oxapentane-1,5-diamide (TODGA) extractant into the macroporous SiO(2)-P support with a mean diameter of 60 μm. The adsorption behavior of Sr(II) and Y(III) onto TODGA/SiO(2)-P adsorbent from HNO(3) solution and their mutual separation were investigated. Under the experimental conditions, this adsorbent showed high adsorption affinity to Y(III) and weak adsorption to Sr(II). It was found that the adsorption process of Y(III) could be expressed by both of Langmuir monomolecular layer adsorption mode and the pseudo-second order model. From the results of stability experiments, it became clear that TODGA/SiO(2)-P adsorbent is stable in 3M HNO(3) solution for 1 month contact time at 298 K. Using a column packed with TODGA/SiO(2)-P adsorbent, Sr(II) and Y(III) were eluted by distilled water and diethylenetriamine pentaacetic acid (DTPA) solution, respectively. The separation of Y(III) from Sr(II)-Y(III) group was achieved successfully.
authors.affiliation: Cyclotron and Radioisotope Center, Tohoku University, Aoba 6-3, Aramaki, Sendai, 980-8578, Japan.
authors.forename: Yuanlai
authors.initials: Y
authors.lastname: Xu
authors.forename: Seong-Yun
authors.initials: SY
authors.lastname: Kim
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Ito
authors.forename: Kasane
authors.initials: K
authors.lastname: Nakazawa
authors.forename: Yoshihito
authors.initials: Y
authors.lastname: Funaki
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Tada
authors.forename: Keitaro
authors.initials: K
authors.lastname: Hitomi
authors.forename: Keizo
authors.initials: K
authors.lastname: Ishii
mesh_terms: D000327:Adsorption; D008855:Microscopy, Electron, Scanning; D009569:Nitric Oxide / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D012996:Solutions; D013324:Strontium / Q000302:isolation & purification*; D015019:Yttrium / Q000302:isolation & purification*
chemical_list: D012996:Solutions; D009569:Nitric Oxide; D015019:Yttrium; D012822:Silicon Dioxide; D013324:Strontium