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Thermodynamic data for divalent cations onto new modified glycidoxy silica surface at solid/liquid interface
- Source :
- Journal of Thermal Analysis and Calorimetry; 2002, Vol. 70 Issue: 1 p135-141, 7p
- Publication Year :
- 2002
-
Abstract
- Abstract: Ethylenediamine molecule was chemically bonded on a silica gel surface previously anchored with 3-glycidoxypropyltrimethoxysilane. This new surface was employed to adsorb divalent cation from aqueous solutions at 298±1 K. The series of adsorption isotherms were adjusted to a modified Langmuir equation from data obtained by suspending the solid with MCl<subscript>2</subscript> (M=Cu, Ni, Zn and Co) solutions, which gave the maximum number of moles adsorbed as 1.54, 0.56, 0.45 and 0.36 mmol g<superscript>-1</superscript> for Cu, Ni, Co and Zn, respectively. Suspended aliquots of the chemically modified surface were calorimetrically titrated and the thermodynamic data showed the system is favored enthalpically and by free Gibbs energy.
Details
- Language :
- English
- ISSN :
- 13886150 and 15882926
- Volume :
- 70
- Issue :
- 1
- Database :
- Supplemental Index
- Journal :
- Journal of Thermal Analysis and Calorimetry
- Publication Type :
- Periodical
- Accession number :
- ejs15349729
- Full Text :
- https://doi.org/10.1023/A:1020657717833