Removal of metal ions using a new magnetic chitosan nano-bio-adsorbent; A powerful approach in water treatment

Karimi F., Ayati A., Tanhaei B., Sanati A. L., Afshar S., Kardan A., ...More

Environmental Research, vol.203, 2022 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 203
  • Publication Date: 2022
  • Doi Number: 10.1016/j.envres.2021.111753
  • Journal Name: Environmental Research
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Applied Science & Technology Source, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), Artic & Antarctic Regions, BIOSIS, CAB Abstracts, Communication Abstracts, Computer & Applied Sciences, EMBASE, Environment Index, Geobase, Greenfile, MEDLINE, Metadex, Pollution Abstracts, Public Affairs Index, Veterinary Science Database, Civil Engineering Abstracts
  • Keywords: Removal, Magnetic adsorbent, Chitosan-base adsorbent, Metal ions, ADSORPTIVE REMOVAL, AQUEOUS-SOLUTION, KINETICS, NANOPARTICLES, CD(II), NI(II), EDTA, EQUILIBRIUM, PERFORMANCE, MECHANISM
  • Akdeniz University Affiliated: Yes

Abstract

© 2021 Elsevier Inc.In this study, a magnetic chitosan/Al2O3/Fe3O4 (M-Cs) nanocomposite was developed by ethylenediaminetetraacetic acid (EDTA) functionalization to enhance its adsorption behavior for the removal of Cd(II), Cu(II) and Zn(II) metal ions from aqueous solution. The results revealed that the EDTA functionalization of M-Cs increased its adsorption capacity ~9.1, ~5.6 and ~14.3 times toward Cu, Cd and Zn ions. The maximum adsorption capacity followed the order of Cd(II) > Cu(II) > Zn(II) and the maximum adsorption efficiency was achieved at pH of 5.3 with the removal percentage of 99.98, 93.69 and 83.81 %, respectively, for the removal of Cu, Cd and Zn ions. The metal ions adsorption kinetic obeyed pseudo-second-order equation and the Langmuir isothermal was found the most fitted model for their adsorption isothermal experimental data. In addition, the thermodynamic study illustrated that the adsorption process was exothermic and spontaneous in nature.