Adsorption of bisphenol A and phenoxyacetic acid onto new polymeric adsorbents

New quaternary amine-containing resins were prepared and used for adsorption of phenoxyacetic acid (PAC) and bisphenol A (BPA). For this purpose, crosslinked poly (glycidyl methacrylate (GMA)-co-ethylene glycol dimethacrylate (EGDMA)) beads (PGMA) were prepared and modified with N,N-diethylethylenediamine to obtain tertiary amine function carrying (BR) resin. Other quaternary amine function carrying resins were prepared starting from crosslinked poly (vinyl benzyl chloride (VBC)-co-EGDMA) (PVBC) resin. PVBC resin was reacted with imidazole and ethyl piperazine to obtain imidazole- and ethyl piperazine-modified resins, respectively. Then, these resins were reacted with chloroacetamide to prepare quaternary amine resins, PVBCIM (quaternized imidazole modified PVBC), PVBCEP (quaternized ethylpiperazine PVBC). The adsorption isotherm experiments of adsorbed pesticides on the new polymeric resins were performed at 25°C by using Freundlich and Langmuir models. The maximum BPA sorption capacities of the new polymeric adsorbents were obtained as BR>PVBCEP>PVBCIM, respectively. For PAC, the adsorption maximum capacities of the new polymeric adsorbents changed to PVBCEP>PVBCIM>BR. Characterization of adsorbents was performed by SEM and FTIR method before and after adsorption experiments. The adsorption kinetics of pesticides was studied depending on temperature (25^oC-40^oC) and also kinetic models were applied such as pseudo-first order, corrected-second order and intraparticle diffusion model.