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<p>Metal–organic frameworks (MOFs) have found a wide range of applications in the field of water treatment owing to their large specific surface area, well-developed cavities and abundant active centers. In this study, a magnetic MOF composite (Fe<sub>3</sub>O<sub>4</sub>/MIL-100(Fe)) was synthesized via a one-pot synthesis at room temperature, and its adsorption capacities towards diclofenac sodium (DS) and 2,4-dichlorophenoxyacetic acid (2, 4-D) were assessed. The maximum adsorption capacity of Fe<sub>3</sub>O<sub>4</sub>/MIL-100(Fe) was 249&#xa0;mg·g<sup>–1</sup> for DS (pH 6.8, 313&#xa0;K), whereas it was found to be 163&#xa0;mg·g<sup>–1</sup> for 2, 4-D (pH 3.0, 293&#xa0;K). Results from fitting isotherm models with the equilibrium data suggested that both the Langmuir and Koble–Corrigan models be suitable for describing the adsorption equilibrium data. Results from kinetic model analysis suggested that both the pseudo-second-order and double-constant model could describe the uptake of DS and 2, 4-D onto Fe<sub>3</sub>O<sub>4</sub>/MIL-100(Fe) well, respectively. The adsorption processes include both homogeneous physical and chemical adsorptions, such as electrostatic interaction, hydrogen bonding, and π–π interaction. Furthermore, Fe<sub>3</sub>O<sub>4</sub>/MIL-100(Fe) showed good regeneration and reusability, indicating that the synthesized adsorbent is highly efficient, relatively cost-effective, and stable.</p>

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Adsorption of Diclofenac Sodium and 2, 4-Dichlorophenoxyacetic on Magnetic MIL-100(Fe) Composite Obtained at Room Temperature

  • 期刊论文

  • 发表日期：

    2025年6月10日

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  • Yanfen Niu,
  • Yuwei Song,
  • Aaron Albert Aryee,
  • Rong Wang,
  • Runping Han

摘要

Metal–organic frameworks (MOFs) have found a wide range of applications in the field of water treatment owing to their large specific surface area, well-developed cavities and abundant active centers. In this study, a magnetic MOF composite (Fe3O4/MIL-100(Fe)) was synthesized via a one-pot synthesis at room temperature, and its adsorption capacities towards diclofenac sodium (DS) and 2,4-dichlorophenoxyacetic acid (2, 4-D) were assessed. The maximum adsorption capacity of Fe3O4/MIL-100(Fe) was 249 mg·g–1 for DS (pH 6.8, 313 K), whereas it was found to be 163 mg·g–1 for 2, 4-D (pH 3.0, 293 K). Results from fitting isotherm models with the equilibrium data suggested that both the Langmuir and Koble–Corrigan models be suitable for describing the adsorption equilibrium data. Results from kinetic model analysis suggested that both the pseudo-second-order and double-constant model could describe the uptake of DS and 2, 4-D onto Fe3O4/MIL-100(Fe) well, respectively. The adsorption processes include both homogeneous physical and chemical adsorptions, such as electrostatic interaction, hydrogen bonding, and π–π interaction. Furthermore, Fe3O4/MIL-100(Fe) showed good regeneration and reusability, indicating that the synthesized adsorbent is highly efficient, relatively cost-effective, and stable.