Preparation of chitosan/magnetite composite beads and their application for removal of Pb(II) and Ni(II) from aqueous solution

Hoang Vinh Tran; Lam Dai Tran; Thinh Ngoc Nguyen

doi:10.1016/j.msec.2009.11.008

Preparation of chitosan/magnetite composite beads and their application for removal of Pb(II) and Ni(II) from aqueous solution

Mater Sci Eng C Mater Biol Appl. 2010 Jan 30;30(2):304-310. doi: 10.1016/j.msec.2009.11.008. Epub 2009 Nov 20.

Authors

Hoang Vinh Tran¹, Lam Dai Tran², Thinh Ngoc Nguyen¹

Affiliations

¹ Faculty of Chemical Technology, Hanoi University of Technology, 1, Dai Co Viet Road Hanoi, Vietnam.
² Institute of Materials Science, Vietnamese Academy of Science and Technology, 18, Hoang Quoc Viet Road, Hanoi, Vietnam. Electronic address: tdlam@vast.ac.vn.

PMID: 30011621
DOI: 10.1016/j.msec.2009.11.008

Abstract

A simple and effective process has been proposed to prepare chitosan/magnetite nanocomposite beads with saturation magnetization value as high as uncoated Fe₃O₄ nanoparticles (ca. 54emu/g). The reason was that the coating chitosan layer was so thin that it did not affect magnetic properties of these composite beads. Especially, chitosan on the surface of the magnetic Fe₃O₄ nanoparticles is available for coordinating with heavy metal ions, making those ions removed with the assistance of external magnets. Maximum adsorption capacities for Pb(II) and Ni(II), occurred at pH 6 and under room temperature were as high as 63.33 and 52.55mg/g respectively, according to Langmuir isotherm model. These results permitted to conclude that chitosan/magnetite nanocomposite beads could serve as a promising adsorbent not only for Pb(II) and Ni(II) (pH=4-6) but also for other heavy metal ions in wastewater treatment technology.

Keywords: Adsorption isotherm; Chitosan/magnetite composite beads; Fe(3)O(4) nanoparticles; Pb and Ni(II).