Environmental application of amine functionalised magnetite nanoparticles grafted graphene oxide chelants

• Published in: Environmental science and pollution research international 2022-12, Vol.29 (57), p.86485-86498
• Main Authors: Sahu, Prateekshya Suman, Verma, Ravi Prakash, Tewari, Chetna, Sahoo, Nanda Gopal, Saha, Biswajit
• Format: Article
• Language: English
• Subjects: Adsorption; Advances in Chemical and Environmental Engineering; Aquatic Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; Chelating agents; Chelation; Earth and Environmental Science; Ecotoxicology; Edetic acid; Electron microscopes; Environment; Environmental Chemistry; Environmental Health; Environmental science; Ethylenediaminetetraacetic acids; Fourier transforms; Graphene; Heavy metals; Infrared spectra; Iron oxides; Isotherms; Magnetic properties; Magnetite; Metal ions; Nanocomposites; Nanoparticles; Raman spectroscopy; Scanning electron microscopy; Self-assembly; Spectrum analysis; Surface chemistry; Synergistic effect; Waste Water Technology; Wastewater treatment; Water Management; Water Pollution Control; X-ray diffraction
• ISSN: 0944-1344; 1614-7499
• DOI: 10.1007/s11356-022-21407-3

This study proposed a two-step method involving hydrothermal and electrostatic self-assembly processes for synthesising an amine-functionalised magnetic ligand graphene oxide–based nanocomposite (EDTA@Fe 3 O 4 @GO). The amine groups were successfully attached to the surface of iron (II, III) oxide (Fe 3 O 4 ), which were embedded on the surface of graphene oxide (GO) (Fe 3 O 4 @GO). This EDTA@ Fe 3 O 4 @GO nanocomposite was used as a chelating agent to bind the toxic heavy metal ions. EDTA@Fe 3 O 4 @GO demonstrated the synergistic effect between the large surface area and magnetic behaviour of Fe 3 O 4 @GO and the chelating effect of EDTA, and it showed higher efficiency than the individual GO and Fe 3 O 4 . The possible structural and compositional characteristics were proposed based on Fourier transform infrared spectra (FTIR), X-ray diffraction (XRD), scanning electron microscope (SEM), Brunauer–Emmett–Teller (BET) and Raman spectroscopy analysis. The outcomes revealed the mechanism behind the excellent As(V) adsorption onto EDTA@Fe 3 O 4 @GO. The adsorption process was studied by fitting the experimental data obtained into various kinetic and isotherm models. The pseudo-second-order (PSO) kinetic model and the Freundlich isotherm model (FIM) were found to be the best fit models for the removal of As(V) by EDTA@Fe 3 O 4 @GO. EDTA@Fe 3 O 4 @GO has the utmost adsorption capacity of 178.4 mg/g. Furthermore, the EDTA@Fe 3 O 4 @GO nanocomposite is reusable, and it showed excellent adsorption capacity up to 5 cycles. This study has provided insight into the potential of EDTA@Fe 3 O 4 @GO and its applications in large-scale wastewater treatment.