Molecules (May 2023)

Preparation of Fe/Ni-MOFs for the Adsorption of Ciprofloxacin from Wastewater

  • Fuhua Wei,
  • Kui Wang,
  • Wenxiu Li,
  • Qinhui Ren,
  • Lan Qin,
  • Mengjie Yu,
  • Zhao Liang,
  • Meng Nie,
  • Siyuan Wang

DOI
https://doi.org/10.3390/molecules28114411
Journal volume & issue
Vol. 28, no. 11
p. 4411

Abstract

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This work studies the use of Fe/Ni-MOFs for the removal of ciprofloxacin (CIP) in wastewater. Fe/Ni-MOFs are prepared by the solvothermal method and characterized by X-ray diffraction (XRD), a scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR), and a thermal gravimetric analyzer (TG). Under the conditions of the concentration of 50 ppm, a mass of 30 mg, and a temperature of 30 °C, the maximum adsorption capacity of ciprofloxacin removal within 5 h was 232.1 mg/g. The maximum removal rate was 94.8% when 40 mg of the Fe/Ni-MOFs was added to the solution of 10 ppm ciprofloxacin. According to the pseudo-second-order (PSO) kinetic model, the R2 values were all greater than 0.99, which proved that the adsorption theory of ciprofloxacin by Fe/Ni-MOFs was consistent with the practice. The adsorption results were mainly affected by solution pH and static electricity, as well as other factors. The Freundlich isotherm model characterized the adsorption of ciprofloxacin by Fe/Ni-MOFs as multilayer adsorption. The above results indicated that Fe/Ni-MOFs were effective in the practical application of ciprofloxacin removal.

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