SCI和EI收录∣中国化工学会会刊

›› 2014, Vol. 22 ›› Issue (9): 984-990.DOI: 10.1016/j.cjche.2014.07.001

• SEPARATION SCIENCE AND ENGINEERING • Previous Articles     Next Articles

Porous Spherical Cellulose Carrier Modified with Polyethyleneimine and Its Adsorption for Cr(Ⅲ) and Fe(Ⅲ) from Aqueous Solutions

Zhijian He1,2, Hang Song2, Yannan Cui2, Weixia Zhu2, Kaifeng Du2, Shun Yao2   

  1. 1 School of Chemistry and Chemical Engineering, Mianyang Normal University, Mianyang 621000, China;
    2 Department of Pharmaceutical and Biological Engineering, Sichuan University, Chengdu 610065, China
  • Received:2014-04-26 Revised:2014-07-14 Online:2014-11-04 Published:2014-09-28
  • Supported by:
    Supported by the National Natural Science Foundation of China (81373284, 81102344), the Project of Education Department in Sichuan (14ZB0267) and the Bureau of Science and Technology of Mianyang City of China (10Y003-8).

Porous Spherical Cellulose Carrier Modified with Polyethyleneimine and Its Adsorption for Cr(Ⅲ) and Fe(Ⅲ) from Aqueous Solutions

Zhijian He1,2, Hang Song2, Yannan Cui2, Weixia Zhu2, Kaifeng Du2, Shun Yao2   

  1. 1 School of Chemistry and Chemical Engineering, Mianyang Normal University, Mianyang 621000, China;
    2 Department of Pharmaceutical and Biological Engineering, Sichuan University, Chengdu 610065, China
  • 通讯作者: Shun Yao
  • 基金资助:
    Supported by the National Natural Science Foundation of China (81373284, 81102344), the Project of Education Department in Sichuan (14ZB0267) and the Bureau of Science and Technology of Mianyang City of China (10Y003-8).

Abstract: An efficient porous spherical polyethyleneimine-cellulose (PEI-cell) absorbent was synthesized and characterized. The main influencing factors and adsorption mechanism for two typical metal ions, Cr3+ and Fe3+, were investigated. The adsorption performance primarily depends on the initial concentration of metal ions, pH value and temperature, and the chelation action between N atoms of PEI-cell and metal ions plays an important role. Under dynamic adsorption conditions, the saturation adsorption of polyethyleneimine-cellulose is 83.98 mg·g-1 for Cr(Ⅲ) and 377.19 mg·g-1 for Fe(Ⅲ), higher than reported data and that of unmodified cellulose. The adsorption can be well described with second-order kinetic equation and Freundlich adsorption model, and ΔH, ΔG and ΔS of the adsorption are all negative. With 5% HCl as eluent, the elution ratio of Cr(Ⅲ) and Fe(Ⅲ) achieved 99.88% and 97.74% at 313 K, respectively. After the porous PEI-cell was reused 6 times, it still presented satisfactory adsorption performance. Above results show the advantages such as easily-acquired raw material, high efficiency, stable recycling performance and biodegradability.

Key words: Polyethyleneimine, Cellulose particle, Adsorption, Cr(Ⅲ), Fe(Ⅲ)

摘要: An efficient porous spherical polyethyleneimine-cellulose (PEI-cell) absorbent was synthesized and characterized. The main influencing factors and adsorption mechanism for two typical metal ions, Cr3+ and Fe3+, were investigated. The adsorption performance primarily depends on the initial concentration of metal ions, pH value and temperature, and the chelation action between N atoms of PEI-cell and metal ions plays an important role. Under dynamic adsorption conditions, the saturation adsorption of polyethyleneimine-cellulose is 83.98 mg·g-1 for Cr(Ⅲ) and 377.19 mg·g-1 for Fe(Ⅲ), higher than reported data and that of unmodified cellulose. The adsorption can be well described with second-order kinetic equation and Freundlich adsorption model, and ΔH, ΔG and ΔS of the adsorption are all negative. With 5% HCl as eluent, the elution ratio of Cr(Ⅲ) and Fe(Ⅲ) achieved 99.88% and 97.74% at 313 K, respectively. After the porous PEI-cell was reused 6 times, it still presented satisfactory adsorption performance. Above results show the advantages such as easily-acquired raw material, high efficiency, stable recycling performance and biodegradability.

关键词: Polyethyleneimine, Cellulose particle, Adsorption, Cr(Ⅲ), Fe(Ⅲ)