Superhydrophobic magnetic sorbent via surface modification of banded iron formation for oily water treatment

July 21, 2022

Title

Superhydrophobic magnetic sorbent via surface modification of banded iron formation for oily water treatment

Author

Mohsen Farahat, Ahmed Sobhy & Moustafa M. S. Sanad

Year

2022

Journal

Scientific Reports

Abstract

In the current study, a simple dry coating method was utilized to fabricate a super-hydrophobic super-magnetic powder ([email protected]) for oily water purification using zinc stearate (ZS) and banded iron formation (BIF). The produced composite was fully characterized as a magnetic sorbent for oily water treatment. The results of X-ray diffraction diffractometer (XRD), Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDS) and particle size analysis revealed the fabrication of homogenous hydrophobic-magnetic composite particles with core–shell structure. Contact angle and magnetic susceptibility results showed that 4 (BIF): 1 (Zs) was the ideal coverage ratio to render the core material superhydrophobic and preserve its ferromagnetic nature. The capability of the fabricated composite to sorb. n-butyl acetate, kerosene, and cyclohexane from oil–water system was evaluated. [email protected] composite showed a higher affinity to adsorb cyclohexane than n-butyl acetate and kerosene with a maximum adsorption capacity of about 22 g g−1 and 99.9% removal efficiency. Moreover, about 95% of the adsorbed oils could be successfully recovered (desorbed) by rotary evaporator and the regenerated [email protected] composite showed high recyclability over ten repeated cycles.

Instrument

FT/IR-6300

Keywords

water treatment, purification