Synthesis of a Useful and Economic Polymeric Material for Effective Removal of Bisphenol A

Abstract

A composite material containing polyacryl amide (PAA) and lignin (L) was developed and characterized for effective Bisphenol A (BPA) removal. Fundamentals of the proposed approach is based on adsorption of BPA molecules on PAA-L composite. Characterization of material was carried out by FTIR and PZC analysis. Adsorption of BPA ions from aqueous solution as a function of BPA concentration, pH, ionic strength, temperature, and reusability of adsorbent was investigated in detail. The adsorption data were analyzed by using the Langmuir, Freundlich and Dubinin-Radushkevich (DR) models. As a result of this analysis, r(2) values were found as 0.991, 0.984, and 0.873, respectively. Maximum adsorption capacity obtained from Langmuir model was calculated as 55.358 mg g(-1). Freundlich heterogeneity was found as 0.637 while EDR value obtained from DR model as 12.219. Experimental results showed that the adsorption of BPA is based on chemical binding, exothermic and spontaneous process. Reusability of PAA-L adsorbent was verified by recovery experiments for a lot of times and was not observed any change or deterioration on the material.