Synthesis of polyacrolein organic gel and its adsorption properties on acid fuchsin

In this paper, the organic gel polyacrolein (PA OG ) was prepared by NaOH-induced ionic polymerization with acrolein as raw material, which presented good adsorption performance on acid fuchsin (AF). It has been characterized using BET, FT-IR, zeta potential measurements, and XPS to determine the structural and physicochemical properties of PA OG . The adsorption performance was examined in relation to contact time, temperature, and pH value. According to the results, polyacrolein gel adsorbent had a fast adsorption rate, and the adsorption process basically reached equilibrium in the first thirty minutes, which agreed with the pseudo-second-order kinetics. It was determined that the adsorption isotherm conformed to the Langmuir model, which was the endothermic spontaneous reaction (ΔH > 0, ΔG < 0). The five executed adsorption–desorption cycles of AF suggested a good reusability of PA OG . These results can help us better understand the adsorption mechanism of PA OG on AF and provide useful treatment method for removing AF.