Removal of anionic phenol red from water solution in the batch system by using N,N-dimethylacrylamide and 3-acrlylamidopropil-trimethyl ammonium chloride-based polymeric hydrogels

Abstract

p(DMAAm-co-APTMACl)-based hydrogels were synthesized with different molar ratios by the redox polymerization technique using N,N-Dimethylacrylamide (DMAAm) and 3acrlylamidopropil-trimethyl ammonium chloride (APTMACl) monomers and a crosslinker. In this study, the aim was to improve the swelling properties and dye sorption of the prepared hydrogels. The equilibrium swelling values of hydrogels were determined by the gravimetric method in deionized water and different pH values, and their structural characterizations were examined with Fourier transform infrared spectroscopy (FT-IR) and thermal gravimetric analysis (TGA) techniques. Sorption efficiencies and sorption capacities of the synthesized hydrogels were determined using aqueous solutions containing phenol red dye at 25 °C. In sorption studies, the effects of different concentrations (5-50 ppm) and different pH values (2-12) on sorption were examined. When the swelling analysis in deionized water was examined, there was a significant increase in the equilibrium swelling value of p(DMAAm-co-APTMACl)-based hydrogel as the mole ratio of APTMACl increased. In addition, the increase in the molar ratio of APTMACl was found to increase the phenol red dye sorption capacity and removal percentage. It was observed that p(DMAAm-co-APTMACl) (2:8) hydrogel had maximum sorption capacity in the range of 5-50 ppm and reached 122.2 mg/g. Experimental data showed that the synthesized p (DMAAm-co-APTMACl)-based hydrogels were effective in removing dye from wastewater and could obtain increased dyestuff removal by synthesis with different molar ratios.