Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
217113 | The Journal of Chemical Thermodynamics | 2008 | 5 Pages |
Abstract
Optical brighteners Tinopal UP and Leucophor AP are used in additional treatment of bleached softwood kraft pulp under different conditions. The present paper describes the applicability of Temkin adsorption isotherm to characterize the thermodynamic equilibrium reached in chemisorption of an optical brightener on pulp’s uniformly non-homogeneous surface. It is found that this is an endothermic process. The entropy factors dominate the developing non-homogeneity and hence the variation of the Gibbs’s free energy as well.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Greta Radeva, Stefka Veleva, Eva Valcheva,