Synthesis of Crosslinked Magnetic Chitosan to Removal of Trace Amounts of Some Heavy Metals from Aqueous Solutions

Document Type : Original Article

Authors

Department of Chemistry, Varamin (Pishva) Branch, Islamic Azad University, P.O. Box: 33817-74895, Varamin, Iran

Abstract

Trace amounts of Cu (II) and Pb (II) in the wastewater sample were removed with a new nano biosorbent based on cross-linked chitosan magnetic beads modified with methionine-glutaraldehyde Schiff's base (MG-Chi/Fe3O4) in wastewater samples. Fourier transform infrared spectra (FTIR), X-ray diffraction (XRD) analysis, and scanning electron microscope (SEM) have been applied to characterize nano biosorbent. Various parameters affecting the uptake behavior of the metal ions were examined and optimized, including pH, adsorbent dose, contact time, and initial concentration. Freundlich and Langmuir isotherm models were applied to estimate adsorption mode. The equilibrium data were well fitted with the Langmuir isotherm model. The maximum adsorption capacities for Cu (II) and Pb (II) were 172.4 and 175.4 mg g-1, respectively. The adsorption kinetics are better consistent with the pseudo-second-order model. It was concluded that this method was successfully applied for the simultaneous removal of Cu (II) and Pb (II) in industrial wastewater samples.

Keywords

Main Subjects

References

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Journal of Color Science and Technology
Volume 16, Issue 2 - Serial Number 60
September 2022
Pages 135-145

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