Chinese Journal of Applied Chemistry ›› 2016, Vol. 33 ›› Issue (9): 1040-1046.DOI: 10.11944/j.issn.1000-0518.2016.09.160211

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Adsorption Thermodynamics and Kinetics of Phenols on Metal-Organic Framework Aluminum Terephthalate in Water

YANG Chengxiong,WANG Shiwei,YAN Xiuping()   

  1. Research Center for Analytical Sciences,College of Chemistry,Nankai University,Tianjin 300071,China
  • Received:2016-05-20 Accepted:2016-06-27 Published:2016-08-23 Online:2016-08-23
  • Contact: YAN Xiuping
  • Supported by:
    Supported by 973 Program(No.2015CB932001), the National Natural Science Foundation of China(No.21305071)

Abstract:

Adsorption of phenols such as o-nitrophenol, phenol, and catechol on metal-organic framework aluminum terephthalate[MIL-53(Al), MIL:Materials of Institut Lavoisier] was investigated in detail in terms of adsorption isotherms, thermodynamics, and kinetics. The adsorption of the phenols on MIL-53(Al) follows a pseudo-second order kinetic model. Intraparticle diffusion model analysis reveals that the adsorption of the phenols on MIL-53(Al) proceeds by two phases, surface sorption and intraparticle/pore diffusion. The adsorption of phenols fits well with the Freundlich model. In addition, the results indicate that the adsorption of the phenols on MIL-53(Al) is a thermodynamically spontaneous process with positive enthalpy change and positive entropy change. The adsorption capacities for o-nitrophenol, phenol, and catechol at 40 ℃ are 78.6, 30.5, and 16.5 mg/g, respectively.

Key words: metal-organic framework, adsorption, phenols, aluminum terephthalate