Synthesis, characterization and application of high adsorption performance of novel 1,4-polyketone
Marwa M. Sayed, Islam S. Abd El-Hamid, Haitham M. El‐Bery, Mostafa Farrag, Alaa K. Abdelhakiem, Kamal I. Aly
Abstract
Abstract This study aims to develop an alternating polyketone containing cationic groups in one and four alternating positions for increased functionality. A novel polyarylidene ketone was synthesized using simple condensation polymerization of terephthaldehyde and 2,5-hexane dione (PAK) The physicochemical properties of the resulting polymer were evaluated using Fourier-transform infrared spectroscopy, thermogravimetric analysis, X-ray diffraction, UV-Visible absorbance, fluorescence, and SEM investigations. The findings show that the polymer is amorphous, has good thermal stability, and emits red light. It can also be used as a dye adsorbent in aqueous solutions, with high selectivity for the cationic dye methylene blue (MB). The adsorbent efficiency of PAK was measured as a function of pH, dosage, and initial dye concentration; the greatest dye removal of 96 % was obtained at pH 10, 50 mg dosage, and initial dye concentration of 20 ppm. Kinetics and isotherms were studied, showing that the pseudo-second-order model described kinetic data better than Freundlich and Langmuir and revealed a satisfactory chemisorption process. This study suggests that PAK can purify MB dyeing wastewater, remove Zn 2+ , Cu 2+ , Ni 2+ , Co 2+ , Cd 2+ , Fe 3+ metal ions well, and is selective for Fe 3+ and Cu 2+ ; ion adsorption is chelating-based.