Enhanced adsorption behavior of amended EDTA–graphene oxide for methylene blue and heavy metal ions

  • S. M. Khadivi
  • L. EdjlaliEmail author
  • A. Akbarzadeh
  • K. Seyyedi
Original Paper


Here, edetic acid (EDTA) structure was chemically modified by aspartic acid and lysine (two α-amino acids) over covalent functionalization. The obtained modified EDTA (m-EDTA) was used to functionalize graphene oxide (GO) surface for effective removal of dyes from waste waters. The methylene blue dye was adsorbed on the hybrid sorbent through ππ interactions with GO conjugated surface and also electrostatic interactions with multivalent chelating m-EDTA sites. The synthesized hybrid sorbent has been characterized with X-ray powder diffraction, scanning electron microscope, Fourier transform infrared spectroscopy, and ultraviolet–visible spectroscopy. 0.03 g of synthesized hybrid sorbent has been used for treatment of 30 mL of pollutant (1 g/L). The results indicate high removal efficiency was obtained in first 20 min that verify the modification of the GO has a positive effect on removal efficiency.

Graphical abstract


Graphene oxide Surface functionalization Dye removal EDTA Methylene blue 



This work was supported by Tabriz branch Islamic Azad University. We thank our colleagues in Chemistry Department of Tabriz branch Islamic Azad University who provided insight and expertise which greatly assisted the research.


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Copyright information

© Islamic Azad University (IAU) 2019

Authors and Affiliations

  • S. M. Khadivi
    • 1
  • L. Edjlali
    • 1
    Email author
  • A. Akbarzadeh
    • 2
  • K. Seyyedi
    • 1
  1. 1.Department of Chemistry, Tabriz BranchIslamic Azad UniversityTabrizIran
  2. 2.Department of Medical Nanotechnology, Faculty of Advanced Medical ScienceTabriz University of Medical ScienceTabrizIran

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