Examination of isotherms and kinetics of surfactant adsorption with modified poly (ethylene terephthalate) fibers

In this research, the graft copolymerization of 2-hydroxy propyl methacrylate-acrylic acid mixture onto poly (ethylene terephthalate) fibers, in the presence of benzoyl peroxide as an initiator was accomplished. The Modified fibers were used as a new adsorbent for removal of cetyl pyridinum bromide from aqueous solution. The adsorption data were best fitted by Freundlich isotherm and pseudo first order kinetic models, as well. Thermodynamic parameters like enthalpy, entropy and Gibbs free energy have been determined. The results were emphasized that, the adsorption process was unspontaneous and feasible.