Adsorption studies of Cu (II), Pb (II) and Cr (VI) by chitosan/unitiol composite

Adsorption studies of Cu (II), Pb (II) and Cr (VI) by chitosan/unitiol composite

  • Ainur Nuralikyzy Imangaliyeva M.D.
  • Gulziya A. Seilkhanova
  • Asel Ondasheva
  • Madina Telkhozhayeva

Abstract

Chitosan-unithiol composite for the first time was synthesized by simple and short period procedure. The sorption process was carried out under static conditions at temperature 298 K and at pH=4.5. The concentration of ions of toxic metals before and after sorption was determined by the atomic absorption method. The removal characteristics such as the removal degree and equilibrium time of Cu2+, Pb2+ and Cr6+ were illustrated. The adsorption equilibrium for Cu2+ ions was best described by Langmuir model and for Pb2+ and Cr6+ ions by Freundlich model. It was found that adsorption of Cu2+ and Cr6+ by chitosan-unithiol followed first-order kinetics. Adsorption of Pb2+ was followed second-order kinetics. The sorption process was also investigated under co-presence of heavy metal ions. The obtained results indicate that the synthesized chitosan-unithiol composite is the effective sorbent for removing toxic metal ions.
Published
2018-08-23
How to Cite
IMANGALIYEVA, Ainur Nuralikyzy et al. Adsorption studies of Cu (II), Pb (II) and Cr (VI) by chitosan/unitiol composite. International Journal of Biology and Chemistry, [S.l.], v. 11, n. 1, p. 12-17, aug. 2018. ISSN 2409-370X. Available at: <http://ijbch.kaznu.kz/index.php/kaznu/article/view/289>. Date accessed: 11 dec. 2018. doi: https://doi.org/10.26577/ijbch-2018-1-289.