Radeva G.Valcheva E.Veleva S.2024-07-102024-07-102024-07-102024-07-102009-09-211300-05271303-613010.3906/kim-0803-9SCOPUS_ID:70349089602https://rlib.uctm.edu/handle/123456789/169The 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. © Tübi̇ tak.enArticle