Adsorptive Removal of Reactive Orange ۱۲۲ from Aqueous Solutions by Ionic Liquid Coated Fe۳O۴ Magnetic Nanoparticles as an Efficient Adsorbent

In the present investigation, a novel adsorbent, ionic liquid modified magnetic nanoparticles (IL-Fe۳O۴), was successfully synthesized and characterized by FT-IR spectroscopy, ThermoGravimetric Analysis (TGA), XRD analysis, Scanning Electron Microscopy (SEM) and theory of Brunauer, Emmett, and Teller (BET) for removal of Reactive Orange ۱۲۲ (RO-۱۲۲) from aqueous solutions. The effects of various experimental parameters such as pH, contact time, nanoparticle dosage and ionic liquid amount were studied and optimized. Experimental results indicated that the IL-Fe۳O۴ nanoparticles had removed more than ۹۸% of proposed dye under the optimum conditions. Detection and quantification limits of the proposed method were ۱۴ and ۴۶µg/L, respectively. Desorption process of the adsorbed dye was also investigated using methanol, ethanol and propanol as the solvent. Both the adsorption and desorption of dye were quite fast. The adsorption process preferably followed the Freundlich isotherm and pseudo-second-order kinetic model. The RO-۱۲۲ was removed successfully from environmental water samples too.

کلیدواژه ها:

Reactive orange ۱۲۲ ، Magnetic nanoparticles ، Ionic liquid ، Adsorption