Aminated Covalent Organic Polymers for Anionic Dye Adsorption in Aqueous Systems

Aminated covalent organic polymer (ACOP) was synthesized through a catalyst-free Schiff base reaction involving terephthalaldehyde and melamine, the prepared ACOP used for adsorption of anionic dyes. The possessed high specific surface area (582.07 m2/g) with an average pore size 88.71 Å. Its point zero charge determined as pH 8.26. Anionic dye molecules, methyl orange (MO) G (OG), were to evaluate efficiency ACOP, it found that they adsorbed rapidly on within 1 min. maximum capacities (qm) MO OG 351.9 227.9 mg/g, respectively. Furthermore, results function initial presence/absence cationic (methylene blue; MB) revealed proceeded charge–charge π–π interactions. presence MB along enhanced capacity because synergistic effect positively charged quaternized nitrogen atoms in ACOP. mechanism further investigated using Fourier transform infrared (FT-IR) analysis X-ray photoelectron spectrometry (XPS). adsorbent herein facile offers rapid over wide range dye. For these reasons, can be environmental remediation, especially aqueous systems.