XPS Study of Pb(II) Adsorption on γ-Al_2O_3 Surface at High pH Conditions
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概要
- 論文の詳細を見る
Lead(II) adsorption on γ-Al2O3 at high pH condition (11<pH<13) was studied in NaNO3 solutions. With increasing pH from 11, Pb(II) uptake by γ-Al2O3 was decreased regardless to sodium concentration (0.1 and 1.0 M). XPS spectra showed no chemical shifts occurred in substrate Al (2s, 2p) and O (1s) binding energy by Pb(II) adsorption. Binding energy of adsorbed Pb (4f) had no dependence on pH and adsorption density and was higher than that of orthorhombic yellow PbO and Pb(NO3)2. Molecular orbital (MO) calculation revealed lowest unoccupied molecular orbital (LUMO) energy of Pb(OH)3− was about 6 eV higher than that of Pb(OH)2, and suggested Pb(OH)3− was less reactive than Pb(OH)2 with deprotonated surface hydroxyl ligand. These results suggest that Pb(II) is adsorbed on γ-Al2O3 as inner-sphere surface complex form at high pH condition. Although Pb(II) is adsorbed on γ-Al2O3 as inner-sphere surface complex, bonding between Pb(II) and γ-Al2O3 shows less covalent nature.
- 一般社団法人 日本原子力学会の論文
- 2003-09-25
著者
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IIDA Yoshihisa
Japan Atomic Energy Agency
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YAMAGUCHI Tetsuji
Japan Atomic Energy Agency
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YOSHIDA Takahiro
Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University
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NAKAYAMA Shinichi
Departments of Hospital Pharmacy Pediatrics
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YAMAGUCHI Tetsuji
Department of Fuel Cycle Safety Research, Japan Atomic Energy Research Institute
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IIDA Yoshihisa
Department of Fuel Cycle Safety Research, Japan Atomic Energy Research Institute
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Yoshida Takahiro
Department Of Fuel Cycle Safety Research Japan Atomic Energy Research Institute
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Yoshida Takahiro
Department Of Applied Chemistry Graduate School Of Engineering Nagoya University
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Nakayama Shinichi
Department Of Pediatrics Kakogawa City Hospital
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Nakayama S
Japan Atomic Energy Agency
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