Selective Magnetic Removal of Pb(II) from Aqueous Solution by Porphyrin Linked-Magnetic Nanoparticles

Document Type : Research Paper

Authors

Research institute of petroleum industry, P.O. Box 14665-137, Tehran, Iran

10.7508/jns.2012.04.003

Abstract

The discharge of lead containing effluents into the environment and water bodies is harmful for the human, animals, aquatic flora and fauna. Herein, a novel surface engineered magnetic nanoparticle for removing Pb2+  ions was studied. After surface modification of the magnetite by 3-amino-propyltriethoxysilane (APTES) magnetic nanoparticles with covalently linked porphyrins were synthesized. Two atropisomers of  meso-tetrakis(2-carboxy-4-nonylphenyl) porphyrin (TCNP) were tested to analyze the atropisomeric effect on lead uptake. For characterize the synthesized nanosorbents methods like: Transform Infrared Spectroscopy, X-ray diffraction, Transmission Electron Microscopy and Thermo-Gravimetric Analysis were used. The effects of pH, contact time, sorbent dosage and some co-existing cations were investigated. Regeneration of lead adsorbed material could be possible and the modified magnetic nanoparticles exhibited good reusability. The use of such a system can provide fast and efficient removal of the lead ion by using an external magnetic field. The competitive adsorption tests showed good adsorption selectivity for lead ion.

Keywords

Journal of Nanostructures
Volume 2, Issue 4 - Serial Number 4
December 2012
Pages 417-426

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