Chem. J. Chinese Universities ›› 2018, Vol. 39 ›› Issue (2): 206.doi: 10.7503/cjcu20170378

• Articles: Inorganic Chemistry • Previous Articles     Next Articles

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

WANG Xiaobing1, SHI Xiuyi1, ZHOU Xingjun2, QIU Xiuzhen1, LU Wenguan1,*()   

  1. 1. College of Chemistry and Environmental Engineering, Shaoguan University, Shaoguan 512005, China
    2. College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
  • Received:2017-06-14 Online:2018-02-10 Published:2017-12-18
  • Contact: LU Wenguan E-mail:lwg@sgu.edu.cn
  • Supported by:
    † Supported by the Natural Science Foundation of Guangdong Province, China(Nos.2016A030307048, 2015A030313750), the Featured Innovation Projects in Colleges and Universities of Guangdong Province, China(Natural Science)(No.2014KTSCX169), the Science and Technology Projects of Shaoguan City, China(No.2105-72) and the Student “Climbing” Programs of Guangdong Province, China(No.pdjh2016b0458)

Abstract:

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 ζ potential tests and adsorption effect experiments under different pH values.

Key words: NH2-MIL-53(Al), Diclofenac sodium, Adsorption capacity, Adsorption mechanism

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