Eur. Phys. J. Plus (2022) 137: 544
https://doi.org/10.1140/epjp/s13360-022-02758-9

Regular Article

Facile synthesis of magnetic melamine-based covalent organic framework for removal of Amido Black 10B

¹ Faculty of Chemistry, Bu-Ali Sina University, Hamedan, Iran
² D-8 International University, Hamedan, Iran

^d afkhami@basu.ac.ir

Received: 2 December 2021
Accepted: 23 April 2022
Published online: 4 May 2022

Abstract

In this study, a magnetic covalent organic framework (MCOF) was synthesized using a novel and simple solution method to explore its potential as a magnetic adsorbent for dye removal. The synthesis of MCOF was confirmed using different techniques and data demonstrated that the as-prepared nanoparticles were 21–46 nm in diameter. The MCOF, before and after dye adsorption, was characterized using FT-IR and FE-SEM techniques. The prepared material was used to remove Amido Black 10B (AB10B) as an anionic model dye by magnetic solid-phase extraction from aqueous solutions. The substantial variables governing the removal efficiency were investigated and optimized. The results revealed that MCOF was adequate to remove 20 mg L⁻¹ of dye solution in 2 min. The dye adsorption behavior was well described by the modified Langmuir–Freundlich isotherm with the maximum adsorption capacity of 228.07 mg g⁻¹ due to high surface area (120 m² g⁻¹). The rate of the adsorption process was well explained by the Elovich model with the initial uptake rate of 920.20 mg g⁻¹ s⁻¹. Also, the synthesized adsorbent showed promising reuse potential. Moreover, the nature of AB10B-MCOF bonding was investigated based on the quantum theory of atoms in molecules (QTAIM) analysis. From this study, it was inferred that MCOF was an ideal adsorbent for wastewater treatment because of its advantages, including easy preparation, excellent adsorption capacity, fast adsorption rate, and good reuse potential.