Code: |
CLLLY94 |
Paper Type: |
Article |
Author(s): |
Chang KS, Lin CF, Lee DY, Lo SL, Yasunaga T |
Title: |
Kinetics of Cr(III) adsorption/desorption at the g-Al2O3/Water Interface by the Pressure-Jump Technique |
Journal: |
Journal of Colloid and Interface Science
Volume: 165 Year: 1994 Pages: 169-176
ISSN-Print: 0021-9797 |
Internal Storage: |
V1435 |
DOI: |
10.1006/jcis.1994.1218 |
Abstract: |
Mechanistic information regarding Cr(III) adsorption onto γ-Al2O3 was obtained using the triple layer model (TLM) in conjunction with experimental data gathered using the pressure-jump technique. Adsorption data and TLM simulation results suggest the formation of both mono- and bidentate inner-sphere Cr3+ or CrOH2+ complexes at the surface of γ-Al2O3. The mechanism of Cr(III) sorption was interpreted as proton release from surface hydroxyl group(s) followed by the attachment of Cr3+ or CrOH2+ to form bidentate (SO)2Cr+ and monodentate SOCrOH+. The binding constant of Cr3+ or CrOH2+ with deprotonated reacting site(s) simulated using the TLM and equilibrium sorption data was in excellent agreement with that determined from kinetic results, verifying the proposed reaction mechanisms. |
Surface Area
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Site Density / Protolysis
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Complex Formation
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Formatted Citation
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