A new way for calculating the adsorption capacity from surface excess isotherms

被引：22

作者：

Regdon, I

Dekany, I

Lagaly, G

机构：

[1] Attila Jozsef Univ, Dept Colloid Chem, H-6720 Szeged, Hungary

[2] Univ Kiel, Inst Inorgan Chem, D-24098 Kiel, Germany

来源：

COLLOID AND POLYMER SCIENCE | 1998年 / 276卷 / 06期

关键词：

adsorption; n-butanol; clay minerals; adsorption capacity; surface polarity; alkylammonium montmorillonite; hexadecyl-pyridinium montmorillonite;

D O I：

10.1007/s003960050273

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Adsorption of n-butanol and water from butanol-water mixtures is studied on adsorbents of different hydrophobicity (activated carbon and hydrophobized montmorillonites). The shape of the adsorption isotherms of the hydrophobized clay minerals does not indicate preferential adsorption of butanol. Therefore, the adsorption capacity cannot be determined on the basis of the Langmuir isotherm. A new equation for determining the adsorption capacity is derived by combining the free enthalpy of adsorption with the adsorption excess amount. Both collections of data are obtained from the surface excess isotherm. The reliability of the adsorption capacity is checked by X-ray diffraction measurements.

引用

页码：511 / 517

页数：7

共 24 条

[1] THERMODYNAMICS OF SOLUTION OF HOMOLOGOUS SERIES OF SOLUTES IN WATER [J].