CRCU

Chemical Research in Chinese Universities ›› 2011, Vol. 27 ›› Issue (6): 1031-1034.

• Articles • Previous Articles     Next Articles

Removing Cd2+ by Composite Adsorbent Nano-Fe3O4/Bacterial Cellulose

LU Min1*, GUAN Xiao-hui1 and WEI De-zhou2   

  1. 1. School of Chemical Engineering, Northeast Dianli University, Jilin 132012, P. R. China;
    2. School of Resources & Civil Engineering, Northeastern University, Shenyang 110004, P. R. China
  • Received:2011-01-10 Revised:2011-07-20 Online:2011-11-25 Published:2011-11-07
  • Contact: LU Min E-mail:lumin19770919@yahoo.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.50174014).

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Abstract: A new composite adsorbent, nano-Fe3O4/bacterial cellulose(BC), was prepared through blending method. The process of adsorbing Cd2+ including its isotherm and kinetics measured was studied. The results show that the adsorption efficiency is improved because of huge surface area and surface coordination of nano-Fe3O4 particles. Its adsorption capacity is 27.97 mg/g and the maximum of Cd2+ removal is 74%. The adsorption kinetics can be described by pseudo-second rate model and the adsorption equilibrium by Langmuir type. The superparamagnetism of nano-Fe3O4 particles can help to solve the difficult separation of single BC adsorbent and lead to the quick separation of composite adsorbent from the liquid if a magnetic field was applied. Cd2+ can be desorbed effectively by EDTA and HCl from the composite adsorbent, which can make it be reused.

Key words: Nano-Fe3O4, Bacterial cellulose, Composite adsorbent, Cadmium ion