“Removal of anionic dyes from aqueous solution by novel pyrrolidinium-based Polymeric Ionic Liquid (PIL) as adsorbent: Investigation of the adsorption kinetics, equilibrium isotherms and the adsorption mechanisms involved”

Publication date: Available online 17 May 2019Source: Journal of Environmental Chemical EngineeringAuthor(s): M. Makrygianni, Z.G. Lada, A. Manousou, C.A. Aggelopoulos, V. DeimedeAbstractA novel synthesized N-methyl pyrrolidinium-based Polymeric Ionic Liquid (PIL) was examined as adsorbent for the removal of the widely used in industries anionic dyes, Orange G (OG), Orange II (OII) and Sunset Yellow FCF (SY), from wastewater. The synthesis of the adsorbent was performed in 3 steps involving a free radical polymerization, an N-quaternization reaction and an ion exchange reaction. The final PIL and the precursor copolymers were characterized through 1HNMR, 19FNMR, TGA analysis and their molecular weights were determined by GPC chromatography. The adsorbent was characterized by Attenuated total reflection Fourier transform infrared (ATR-FTIR), N2 Adsorption, SEM, and XRD in order to explore the adsorption mechanisms. The ATR-FTIR spectroscopy acted as a key-role player for the chemical characterization of the adsorbent, but most importantly for investigating the nature of the adsorbent/dye interactions; interesting aspects concerning the adsorption mechanism for each dye were extracted. The effect of several experimental parameters such as pH, adsorbent dose, contact time and initial dye concentration were examined. The ranking of adsorption capacity concerning the three dyes was SY > OII > OG, over the whole concentration range (Cdye = 10-100 ...
Source: Journal of Environmental Chemical Engineering - Category: Chemistry Source Type: research