Preparation of crosslinked chitosan magnetic membrane for cations sorption from aqueous solution

Water Science and Technology : a Journal of the International Association on Water Pollution Research
Adnan KhanMaria Del Pilar Taboada Sotomayor

Abstract

A chitosan magnetic membrane was prepared in order to confer magnetic properties to the membrane, which could be used for the removal of cations from aqueous solution. The crosslinked magnetic membrane was compared with pristine chitosan membrane in term of stability, morphology and cation adsorption capacity. The fabricated magnetic materials are thermally stable as shown by thermogravimetric curves. The membrane containing nickel magnetic particles (CHNiF-G) shows high thermal stability compared to the other membranes. The Fourier transform infrared spectroscopy showed successful preparation of chitosan magnetic membrane. Scanning electron microscopy micrographs showed the rough surface of the membrane with increased porosity. The prepared chitosan membranes were applied to cations of copper, nickel and lead in dilute aqueous solution. The chitosan membrane showed the following adsorption order for metallic cations: Cu2+ > Ni2+ > Pb2+, while CHNiF-G showed higher capacity, 3.51 mmol g-1 for copper, reflecting the improvement in adsorption capacity, since the amount of copper on pristine chitosan gave 1.40 mmol g-1. The time required for adsorption to reach to the equilibrium was 6 h for the selected cations using different ch...Continue Reading

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Citations

Oct 14, 2020·Environmental Science and Pollution Research International·Waqar AhmadMuhammad Bilal
Nov 30, 2020·International Journal of Biological Macromolecules·Yong YangMuhammad Bilal

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