›› 2016, Vol. 24 ›› Issue (2): 323-329.DOI: 10.1016/j.cjche.2015.10.002

• Separation Science and Engineering • Previous Articles    

Relationship between breakthrough curve and adsorption isotherm of Ca(II) imprinted chitosan microspheres for metal adsorption

Yangcheng Lu1, Jing He1, LongwenWu2, Guangsheng Luo 1   

  1. 1 State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China;
    2 State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
  • Received:2015-03-18 Revised:2015-07-01 Online:2016-03-14 Published:2016-02-28
  • Supported by:
    Supported by the National Natural Science Foundation of China (21176136, 21422603) and the National Science and Technology Support Program of China (2011BAC06B01).

Abstract: In this work, an equilibrium-dispersion model was successfully established to describe the breakthrough performance of Ca(II) imprinted chitosan (Ca(II)-CS) microspheres packed column for metal adsorption, and the assumptions of Langmuir isotherms and axial dispersion controlled mass transfer process were confirmed. The axial dispersion coefficient in Ca(II)-CS microspheres packed column was found to be almost proportional to the linear velocity and fit for prediction through single breakthrough test. Sensitivity analysis for breakthrough curve indicated the axial dispersion coefficient as well as Langmuir coefficient was sensitive variable for deep removal requirement. The retrieval of the adsorption isotherms of Ca(II)-CS microspheres from breakthrough curve was fulfilled by modelling calibration. A strategy based on the correlation between adsorption isotherms and breakthrough performance was further proposed to simplify the column adsorption design using absorbents with small/uniformsize and fast adsorption kinetics like Ca(II)-CSmicrospheres to cut down the gap between lab and industry.

Key words: Correlation, Breakthrough curve, Adsorption isotherms, Metal adsorption, Ca(II)-imprinted chitosan microsphere