Temperature dependence of some benzene derivatives adsorption from water solutions onto hydrophobic and hydrophilic porous polymeric sorbents

The experimental data of adsorption of nitrobenzene, p-nitrophenol, phenol, p-nitroaniline, p-nitrobenzoic acid, p-chlorobenzene sulfonamide onto hydrophobic polysorb 60/100 and Wofatite Y-77 and hydrophilic polysorb G-5 are presented in the temperature region of 8-45°C. The change of Gibb's free energy, enthalpy and entropy of adsorption are calculated. It is ascertained that the change of free energy depends little upon temperature, and the change of entropy at adsorption in all cases has negative value, what points to ordering in system under action of an adsorbent field on adsorbate.