SCI和EI收录∣中国化工学会会刊

›› 2017, Vol. 25 ›› Issue (6): 775-781.DOI: 10.1016/j.cjche.2016.10.014

• Separation Science and Engineering • Previous Articles     Next Articles

Adsorption removal of o-nitrophenol and p-nitrophenol from wastewater by metal-organic framework Cr-BDC

Jianhua Chen1,2, Xue Sun1, Lijing Lin1, Xinfei Dong1, Yasan He1   

  1. 1. College of Chemistry and Environmental, Minnan Normal University, Zhangzhou 363000, China;
    2. Fujian Province University Key Laboratory of Modern Analytical Science and Separation Technology, Minnan Normal University, Zhangzhou 363000, China
  • Received:2016-05-02 Revised:2016-10-10 Online:2017-08-02 Published:2017-06-28
  • Supported by:
    Supported by the National Natural Science Foundation of China (No. 21676133) and the Natural Science Foundation of Fujian Province (2014J01051).

Adsorption removal of o-nitrophenol and p-nitrophenol from wastewater by metal-organic framework Cr-BDC

Jianhua Chen1,2, Xue Sun1, Lijing Lin1, Xinfei Dong1, Yasan He1   

  1. 1. College of Chemistry and Environmental, Minnan Normal University, Zhangzhou 363000, China;
    2. Fujian Province University Key Laboratory of Modern Analytical Science and Separation Technology, Minnan Normal University, Zhangzhou 363000, China
  • 通讯作者: Jianhua Chen,Tel.:+86 596 2591445,Fax:+86 596 2520035.E-mail address:jhchen73@126.com
  • 基金资助:
    Supported by the National Natural Science Foundation of China (No. 21676133) and the Natural Science Foundation of Fujian Province (2014J01051).

Abstract: In the present paper, a metal-organic framework Cr-BDC was prepared and used as adsorbent for adsorption of o-nitrophenol (ONP) and p-nitrophenol (PNP) from aqueous solutions. Cr-BDC was characterized by scanning electron microscopy, transmission electron microscope, X-ray diffraction and BET methods. The results indicate that Cr-BDC gets a very large specific surface area of 4128 m2·g-1 and pore sizes are concentrated in 1 nm, which is a benefit for using for wastewater treatment. The influences of the adsorption conditions, such as temperature, solution concentration, adsorption time and reusability on adsorption performance were investigated. Cr-BDC exhibited an encouraging uptake capacity of 310.0 mg·g-1 for ONP, and adsorption capacity of Cr-BDC for ONP is significantly higher than that for PNP under suitable adsorption conditions. The characterizations of adsorption process were examined with the Lagergren pseudo-first-order, the pseudo-second-order kinetic model, and the intra-particular diffusion model. Kinetics experiments indicated that the pseudo-second-order model displayed the best correlation with adsorption kinetics data. Furthermore, our adsorption equilibrium data could be better described by the Freundlich equation. The results indicate that the as-prepared Cr-BDC is promising for use as an effective and economical adsorbent for ONP removal.

Key words: Metal-organic framework, o-Nitrophenol, p-Nitrophenol, Isomers, Adsorption

摘要: In the present paper, a metal-organic framework Cr-BDC was prepared and used as adsorbent for adsorption of o-nitrophenol (ONP) and p-nitrophenol (PNP) from aqueous solutions. Cr-BDC was characterized by scanning electron microscopy, transmission electron microscope, X-ray diffraction and BET methods. The results indicate that Cr-BDC gets a very large specific surface area of 4128 m2·g-1 and pore sizes are concentrated in 1 nm, which is a benefit for using for wastewater treatment. The influences of the adsorption conditions, such as temperature, solution concentration, adsorption time and reusability on adsorption performance were investigated. Cr-BDC exhibited an encouraging uptake capacity of 310.0 mg·g-1 for ONP, and adsorption capacity of Cr-BDC for ONP is significantly higher than that for PNP under suitable adsorption conditions. The characterizations of adsorption process were examined with the Lagergren pseudo-first-order, the pseudo-second-order kinetic model, and the intra-particular diffusion model. Kinetics experiments indicated that the pseudo-second-order model displayed the best correlation with adsorption kinetics data. Furthermore, our adsorption equilibrium data could be better described by the Freundlich equation. The results indicate that the as-prepared Cr-BDC is promising for use as an effective and economical adsorbent for ONP removal.

关键词: Metal-organic framework, o-Nitrophenol, p-Nitrophenol, Isomers, Adsorption