Synthesis of GO/Fe₃O₄-ZnO/CS nanocomposite as an ideal adsorbent for removal of tamoxifen from water

ABSTRACT

In the present study, Fe₃O₄ decorated with ZnO in the first stage and modified with chitosan in the second stage and then deposited on the GO as nanocomposites was utilised for adsorption of tamoxifen (TAM) from various water samples. The obtained nanocomposites (GO/Fe₃O₄-ZnO/CS nanocomposite) were checked through different methods like scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR), vibrating sample magnetometry (VSM), and X-ray diffraction spectrometry (XRD). Based on VSM the magnetisation of GO/Fe₃O₄-ZnO/CS nanocomposite was obtained to be around 22 emu g⁻¹. The removal efficiency of TAM by GO/Fe₃O₄-ZnO/CS nanocomposite is 98.9 at pH = 7.0, primary TAM concentration = 10 mg L⁻¹, GO/Fe₃O₄-ZnO/CS nanocomposite amount = 0.01 g, and equilibrium time = 50 min. Analytical models such as Langmuir (L), Freundlich (F), Temkin (T), Langmuir–Freundlich (L-F), Redlich–Peterson (R-P), pseudo-first-order (PFO), pseudo-second-order (PSO), Elovich (E), fractal-like pseudo-second-order (FL-PSO), and intraparticle diffusion (ID) were employed for modelling the isotherm and kinetic data. Using L-F and FL-PSO models, the outcomes of TAM adsorption onto GO/Fe₃O₄-ZnO/CS nanocomposite were shown to present extremely good adaptability with the empiric data. The maximum ability of TAM was 396.19 mg g⁻¹.

KEYWORDS:

• Adsorption
• GO/Fe₃O₄-ZnO/CS nanocomposite
• Langmuir–Freundlich
• tamoxifen

Disclosure statement

The authors declare that they have no conflict of interest regarding the publication of this article.

Additional information

Funding

No funding was received.