Document Type : Research Paper

Authors

• Mohammad Eisapour Chanani
• Nader Bahramifar
• Habibollah Younesi

Department of Environmental Sciences, Faculty of Natural Resources and Marin Sciences, Tarbiat Modares University, P.O. Box 46414-356, Noor, Iran.

Abstract

The main objective of this study was to synthesize an environmentally friendly nano-structural adsorbent. These nano magnetic particles can be applied to remove heavy metal ions from industrial wastewater because the surface of the particles is covered with SiO₂, and the SiO₂ is inactive and can adsorb heavy metal ions. Tests were then conducted to study the adsorption of Cu(II) ions onto Fe₃O₄@SiO₂ from an aqueous solution for the effect of contact time, adsorbent dose, solution pH and concentration of metal ions in batch systems. The equilibrium data were analyzed using the Langmuir and Freundlich isotherm by nonlinear regression analysis and found that the adsorption isotherm data will better fit by Langmuir model. The maximum adsorption capacities of Cu (II) were 47 mg/g. Fe₃O₄@SiO₂ was regenerated and found to be suitable for reuse in successive adsorption-desorption cycles 5 times without significant loss of adsorption capacity.

Keywords

• Fe3O4
• Nano particles Heavy metal Adsorption Magnetic