Adsorption of reactive red ۱۲۰ dye on modified Fe۳O۴/SiO۲ nanoparticles using (۳–Amino propyl) triethoxysilane

Adsorption of reactive red ۱۲۰ (RR–۱۲۰) on Fe۳O۴ magneticnanoparticles coated by silica which were modified by ۳–aminopropyl triethoxysilane is described. Results indicated that thenanoparticles were able to remove about ۹۸% of RR–۱۲۰ (۲۰.۰ mgL−۱) under the optimum conditions of ۱۵.۰ mg nanoparticles, pH=۳.۰,and contact time of ۷.۰ minutes. Adsorption equilibrium was best fitto the Langmuir adsorption isotherm. The maximum adsorptioncapacity of the adsorbent was ۲۳.۹۸ mg per gram dye. A pseudo–second order kinetic model exhibited the best fit to the experimentaldata.

Keywords:

۳–Aminopropyl triethoxysilane , Reactive red ۱۲۰ , UV– Vis spectrophotometery , Ferrous oxide magnetic nanoparticles , Removal dye