Fe₃O₄@SiO₂‐APTES@Isophthaloyl Dichloride/Montmorillonite Magnetic Nanoparticles for Efficient Removal of Pb²⁺ and Cd²⁺

Abstract

A novel magnetic nanocomposite for removing Cd 2+ and Pb 2+ was prepared by surface coating of Fe 3 O 4 nanoparticles with (3-aminopropyl)triethoxysilane (APTES), followed by functionalization with isophthaloyl dichloride and hybridization with nano montmorillonite (MMT). The structure of the resulting nanocomposite was determined. The Fe 3 O 4 @SiO 2 -APTES@isophthaloyl dichloride/ MMT nanocomposite was successfully used to remove Cd 2+ and Pb 2+ from aqueous solutions. Several tests were designed using response surface methodology and the variables were predicted by the reduced quartic model. Absorption parameters such as time, pH, and initial cation concentration were considered as independent variables. The effects of each on the removal of Cd 2+ and Pb 2+ ions were examined. The efficiency of the model was evaluated by analysis of variance.