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Facile synthesis of Fe

Xiang Zheng1, Jinlin Wang1, Xiaolong Xue2

  • 1School of Environment and Natural Resources, Renmin University of China, Beijing, 100872, China.

Environmental Science and Pollution Research International
|September 14, 2018
PubMed
Summary

Fe3O4@MOF-100(Fe) magnetic microspheres effectively remove diclofenac sodium from water. This novel adsorbent shows high capacity and stability, offering a promising solution for pharmaceutical pollution control.

Keywords:
AdsorptionCore-shell structureDiclofenac sodiumFe3O4MOF-100(Fe)

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Area of Science:

  • Environmental Chemistry
  • Materials Science
  • Nanotechnology

Background:

  • Pharmaceuticals and personal care products (PPCPs) are emerging contaminants in aquatic environments.
  • Diclofenac sodium is a widely used non-steroidal anti-inflammatory drug (NSAID) and a common PPCP pollutant.
  • Effective removal of diclofenac sodium is crucial for water safety and environmental protection.

Purpose of the Study:

  • To investigate the adsorptive removal of diclofenac sodium using Fe3O4@MOF-100(Fe) magnetic microspheres.
  • To evaluate the adsorption capacity, kinetics, and isotherm of the novel adsorbent.
  • To explore the reusability and underlying adsorption mechanisms.

Main Methods:

  • Synthesis and characterization of Fe3O4@MOF-100(Fe) magnetic microspheres.
  • Batch adsorption experiments to study diclofenac sodium removal.
  • Analysis of adsorption kinetics using pseudo-second-order model.
  • Adsorption equilibrium modeling using Langmuir isotherm.
  • Cyclic adsorption experiments to assess material reusability.

Main Results:

  • Fe3O4@MOF-100(Fe) exhibited a core-shell structure with strong magnetism and stability.
  • The maximum adsorption capacity reached 377.36 mg/L, surpassing many reported adsorbents.
  • Adsorption followed pseudo-second-order kinetics and Langmuir isotherm.
  • High removal efficiency (80% after 5 cycles) was maintained for low-concentration diclofenac sodium without desorption.

Conclusions:

  • Fe3O4@MOF-100(Fe) magnetic microspheres are highly effective for diclofenac sodium removal.
  • The adsorbent's performance is attributed to electrostatic, H-bond, and π-π interactions.
  • This material presents a promising application for treating pharmaceutical-contaminated water.