Adsorption Behavior of Metal-organic Framework NH2-MIL-53(Al) for Diclofenac Sodium in Aqueous Solution

作者：Wang Xiaobing; Shi Xiuyi; Zhou Xingjun; Qiu Xiuzhen; Lu Wenguan^*

来源：Chemical Journal of Chinese Universities, 2018, 39(2): 206-211.

DOI：10.7503/cjcu20170378

• NH2-MIL-53(Al)
• Diclofenac sodium
• Adsorption capacity
• Adsorption mechanism

The metal-organic framework(MOF) material of NH2-MIL-53(Al) was solvothermally synthesized, and characterized by powder X-ray diffraction(PXRD), scanning electron microscopy(SEM) and Fourier transform infrared spectroscopy(FTIR). The adsorption behavior of the as-prepared NH2-MIL-53(Al) for diclofenac sodium(DCF) was studied in aqueous solution. The experimental results showed that NH2-MIL-53(Al) had a high adsorption capacity on the target material and reach adsorption equilibrium in 40 min when the concentration of DCF was 5 mg/L. Furthermore, the adsorption kinetics of NH2-MIL-53(Al) for DCF conformed to the pseudo second-order kinetics model. Langmuir model and Freundlich model were used to fit the adsorption isotherms, and the Langmuir model showed a better fit. The experiment of cyclic adsorption showed that NH2-MIL-53(Al) had a good recycle performance. Moreover, the possible adsorption mechanism was demonstrated by the combination of zeta potential tests and adsorption effect experiments under different pH values.

• 出版日期2018-2-10
• 单位韶关学院; 湖南大学