Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 25, Issue 31, Pages 31705-31717Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-018-3134-4
Keywords
MOF-100(Fe); Adsorption; Fe3O4; Core-shell structure; Diclofenac sodium
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Funding
- National Natural Science Foundation of China [51778618, 51478460, 51578037]
- Guangxi Province Technology Major Project [AA17202032]
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In this research, the adsorptive removal of diclofenac sodium, one of the representative pharmaceuticals and personal care products, from aqueous solution using Fe3O4@MOF-100(Fe) magnetic microspheres was studied for the first time. The Fe3O4@MOF-100(Fe) microspheres exhibit strong magnetism and stability, which were observed as a core-shell structure. The maximum adsorption capacity of Fe3O4@MOF-100(Fe) for diclofenac sodium can reach 377.36 mg L-1, which was higher than most of the adsorbents reported. The adsorption kinetics follows the pseudo-second-order kinetic equation. And the adsorption equilibrium of DCF can be described with Langmuir isotherm. In the cycle experiment, Fe3O4@MOF-100(Fe) material performed high adsorption efficiency for low-concentration diclofenac sodium solution, and the removal rate can still reach 80% after 5 cycles of adsorption without desorption. The mechanisms including electrostatic interaction, H-bond interaction, and pi-pi interaction that coexisted in the adsorption processes would be of benefit to enhance the adsorption capacity. The Fe3O4@MOF-100(Fe) magnetic microspheres offer exciting opportunities for further application.
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