Polydopamine coated magnetic nanoparticles: an effective sorbent for Safranin O removal

In the present work, Fe۳O۴ magnetic nanoparticles were prepared through a typical method. Dopamine molecules polymerized into polydopamine in an optimum pH and coated the surface of the Fe۳O۴ magnetic nanoparticles (polydopamine@Fe۳O۴). The as-prepared material was applied as a new sorbent for the removal of Safranin O from aqueous solutions. Chemical characterization of the prepared sorbent was studied by SEM, TEM and FT-IR spectroscopy. Factors affecting absorption like solutions pH, adsorbent dosage, initial concentration, contact time, ionic strength and temperature was studied. The sorption data were fitted with the Langmuir and Freundlich equations to describe the equilibrium isotherms. The maximum adsorption capacity of Safranin O on the prepared sorbent was ۱۵۹.۸ mg g-۱. The results obtained in this study illustrate that polydopamine@Fe۳O۴ is expected to be an effective adsorbent for removal of Safranin O from aqueous solutions.

کلیدواژه ها:

Fe۳O۴ magnetic nanoparticles ، Removal ، Safranin O ، Polydopamine