Adsorption of H, OH and Background Electrolyte Ions on Alumina — Point of Zero Charge, Triple Layer Model (TLM) Parameters and Thermodynamic Parameters
The surface charge σ 0 on aqueous suspensions of alumina was measured as a function of pH in various NaNO 3 concentrations and at different temperatures. The values of the point of zero charge (p.z.c.), pK 1(int) , pK 2(int) , pK Na+(int) and pK NO3–(int) for alumina suspended in NaNO 3 solutions we...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SAGE Publications
1997-06-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1177/026361749701500606 |
| Summary: | The surface charge σ 0 on aqueous suspensions of alumina was measured as a function of pH in various NaNO 3 concentrations and at different temperatures. The values of the point of zero charge (p.z.c.), pK 1(int) , pK 2(int) , pK Na+(int) and pK NO3–(int) for alumina suspended in NaNO 3 solutions were obtained in the temperature range 17–45°C from potentiometrie titration data. The values of ΔS 0 and ΔH 0 of the dissociation equilibria and complexation equilibria were calculated from these equilibrium constants. Standard Gibbs energies, enthalpies and entropies for proton adsorption on alumina were also obtained. The surface charge σ 0 on aqueous suspensions of alumina was measured as a function of pH and concentration of Ca(NO 3 ) 2 or Na 2 SO 4 solution. |
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| ISSN: | 0263-6174 2048-4038 |