Ghemati Djamila^1,, Aliouche Djamel¹, Amri Nedjla¹

The aim of this paper is to use poly (vinylalcohol) polymer membrane as an adsorbent for the removal of 2-nitrophenol, phenol, hydroquinone from aqueous solutions through the batch experiments. In order to obtain efficient adsorbent, cross-linked poly(vinyl alcohol)/glutaraldehyde-β-cyclodextrin membranes were prepared. Synthesized membranes were characterized by infrared spectroscopy and swelling measurements. Then, influence of pH, temperature on the adsorption process was investigated. As results, β-cyclodextrin is completely mixed into the PVA polymer without covalent bond formation. And absorption level of PVA/GA membranes is significantly improved by the presence of β-cyclodextrin. Adsorption capacity increases with increasing amount of cyclodextrin, and it reached the highest value at Ph < pKa; the change in adsorption capacities may be due to the structure effect, weight molecular of phenolic compounds. Therefore, results of adsorption isotherms indicated that the Freundlich isotherm model was more appropriate, the low temperature is favourable for adsorption and the negative value of free energy indicated the spontaneous nature process and easy regeneration of polymeric materials.

poly (vinyl alcohol), β-cyclodextrin, swelling, adsorption, 2-nitrophenol