应用化学 ›› 2016, Vol. 33 ›› Issue (9): 1040-1046.DOI: 10.11944/j.issn.1000-0518.2016.09.160211

• 研究论文 • 上一篇    下一篇

金属-有机骨架对苯二甲酸酯-铝吸附水中酚类化合物动力学和热力学

杨成雄,王士伟,严秀平()   

  1. 南开大学化学学院,分析科学研究中心 天津 300071
  • 收稿日期:2016-05-20 接受日期:2016-06-27 出版日期:2016-08-23 发布日期:2016-08-23
  • 通讯作者: 严秀平
  • 基金资助:
    973项目(2015CB932001)和国家自然科学基金项目(21305071)资助

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)

摘要:

以吸附等温线、动力学和热力学等方法研究了金属-有机骨架对苯二甲酸酯-铝[MIL-53(Al),MIL:Materials of Institut Lavoisier]对水中邻硝基苯酚、苯酚和邻苯二酚的吸附行为。 MIL-53(Al)对上述酚类化合物的吸附符合准二级吸附动力学模型,且包含表面吸附和孔内扩散两个过程。 吸附热力学结果表明,MIL-53(Al)对酚类化合物的吸附是自发的,且为吸热和熵增加过程。 在40 ℃条件下,MIL-53(Al)对邻硝基苯酚、苯酚和邻苯二酚的吸附量分别为78.6、30.5和16.5 mg/g。

关键词: 金属-有机骨架, 吸附, 酚类化合物, 对苯二甲酸酯-铝

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