efficient removal of anionic dyes from aqueous media using newly in situ synthesized triazine-based nitrogen-rich network-modified magnetic nanoparticles

In this research, a triazine-based polymeric network surface-modified magnetic nanoparticles (tpn/mnps) were synthesized for the adsorption of anionic compounds. to obtain tpn/mnps, melamine–terephthaldehyde polymeric network was synthesized in the presence of magnetic nanoparticles. after characterization by fourier transform infrared spectroscopy (ftir), x-ray diffraction (xrd) and transmission electron microscopy (tem), the adsorption behaviors of methyl orange (mo) as model anionic dye on tpn/mnps were investigated. obtained results showed mo removal efficiency has not been influenced by ph (5–9) and high salt concentration (up to 10% w/v) of the solution. the adsorption isotherm was described by langmuir model. the results indicated that tpn/mnps adsorbed mo effectively with a large capacity of 80.6 mg g−1. the adsorption reached the equilibrium within 10 min and the kinetics followed pseudo-second-order model. the magnetic separation after adsorption was easily achieved, and tpn/mnps could be quantitatively regenerated by washing with 1.0 ml of the mixture of methanol/0.1 mol l−1 hcl (50:50, v/v%) solution. the results confirmed that tpn/mnps have the potential superiority in removal of mo from aqueous solution.