Authors: GRETA RADEVA, EVA VALCHEVA, STEFKA VELEVA
Abstract: The present paper reports results of the thermodynamic study of adsorption of 2 optical brighteners (Tinopal UP and Leucophor AP) on pulp. The entropy non-homogeneity of the pulp surface was confirmed and the coefficients of entropy non-homogeneity were determined. The entropy effect on the variation of Gibbs free energy of the process studied was followed.
Keywords: Optical brighteners, pulp, adsorption, entropy non-homogeneity
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