Citation: WEI Yu, WEI Cuixiang, XIA Yan. Efficient adsorption and removal of diclofenac sodium from water with quaternary ammonium functionalized metal-organic frameworks[J]. Chinese Journal of Chromatography, ;2018, 36(3): 222-229. doi: 10.3724/SP.J.1123.2017.11038 shu

Efficient adsorption and removal of diclofenac sodium from water with quaternary ammonium functionalized metal-organic frameworks

WEI Yu ^1, ,
WEI Cuixiang ¹ ,
XIA Yan ^1,2

1.
College of Chemistry, Nankai University, Tianjin 300071, China;
2.
Key Laboratory of Biosensing and Molecular Recognition, Tianjin 300071, China

Received Date: 22 November 2017

Fund Project: Tianjin Research Program of Application Foundation and Advanced Technology (No. 15JCYBJC23800).

A quaternary ammonium functionalized MIL-101(Cr) named MIL-101(Cr)-NMe₃ was synthesized and explored as a novel adsorbent for the fast removal of diclofenac sodium (DCF) in water. The adsorption process of kinetics, adsorption isotherms, thermodynamics, and adsorbent regeneration were investigated. And the effects of key parameters such as pH value and ionic strength on the adsorption of DCF were also studied. The results showed that the adsorption of DCF on MIL-101(Cr)-NMe₃ was very fast. Most of DCF were adsorbed in the first 30 min. The adsorption kinetics of DCF on MIL-101(Cr)-NMe₃ obeyed pseudo-second-order kinetics. The adsorption isotherms of DCF on MIL-101(Cr)-NMe₃ fitted well to the Langmuir adsorption model. And the maximum adsorption capacity was 310.6 mg/g at 20℃. The analysis of the adsorption mechanism showed that the electrostatic interaction and π-π stacking interaction between DCF and MIL-101(Cr)-NMe₃ were responsible for the efficient adsorption. Regeneration experiments indicated that the used MIL-101(Cr)-NMe₃ was recycled at least five times without significant loss of adsorption capacity. The fast adsorption kinetics, high adsorption capacity, and excellent reusability made MIL-101(Cr)-NMe₃ attractive for removal DCF from aqueous solution.
- metal-organic frameworks (MOFs),
- diclofenac sodium,
- adsorption,
- removal
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沈阳化工大学材料科学与工程学院沈阳 110142