title: Removal of uranium(VI) from aqueous solution using iminodiacetic acid derivative functionalized SBA-15 as adsorbents.
abstract: Three different functional SBA-15 were prepared by a post-grafting method using three iminodiacetic acid derivatives of ethylenediaminetriacetic acid (ED3A), diethylenetriaminetetraacetic acid (DT4A), and 1,2-cyclohexylenedinitrilotriacetic acid (CyD3A), which were used as adsorbents for removal of uranium(vi) from aqueous solution. These materials were characterized by FT-IR, NMR, TEM, nitrogen adsorption/desorption experiments, and elemental analysis. The effect of pH, ionic strength, contact time, solid-liquid ratio, initial metal ion concentration, temperature, and coexisting ions on uranium(vi) sorption behaviors of the functionalized SBA-15 was studied. Typical sorption isotherms (Langmuir and Freundlich) were determined for the sorption process, and the maximum sorption capacity was calculated. The influence of functional groups on uranium(vi) sorption was also discussed. As a result, compared with other current U(vi) sorbents (granite, kaolin, attapulgite), SBA-15-1,2-cyclohexylenedinitrilotriacetic acid (SBA-15-CyD3A) possessed good selective sorption properties, which had potential application in separation of uranium(vi).
authors.affiliation: School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, PR China. chensuwen@lzu.edu.cn.
authors.forename: Yu-Long
authors.initials: YL
authors.lastname: Wang
authors.forename: Li-Juan
authors.initials: LJ
authors.lastname: Song
authors.forename: Lu
authors.initials: L
authors.lastname: Zhu
authors.forename: Bo-Long
authors.initials: BL
authors.lastname: Guo
authors.forename: Su-Wen
authors.initials: SW
authors.lastname: Chen
authors.forename: Wang-Suo
authors.initials: WS
authors.lastname: Wu