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Acta Physico-Chimica Sinica  2009, Vol. 25 Issue (10): 1951-1957    DOI: 10.3866/PKU.WHXB20090938
Article     
Adsorption Kinetics of Chromium (VI) onto an Anion Exchange Fiber Containing Polyamine
SUN Xiao-Li, ZENG Qing-Xuan, FENG Chang-Gen
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, P. R. China
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Abstract  

An anion exchange fiber containing polyamine functional group was synthesized by chemical modification using polyacrylonitrile fiber as the raw material. The adsorption behavior of Cr(VI) using the self-made fiber was studied.Within the observed temperature and concentration range, equilibriumdata for the adsorption of Cr(VI) from aqueous solutions by the fiber were obtained and correlated with Langmuir-type and Freundlich-type isotherm equations. The adsorption is shown to be a favorable type and the polyamine functional group has a strong affinity for Cr(VI). We mainly studied the adsorption kinetics of Cr(VI) onto the self-made fiber and fitted the kinetic data to the Lagergren first-order equation, the pseudo second-order equation, the modified pseudo first-order equation, and the intra-particle diffusion model. The respective characteristic rate constants were calculated and analyzed. Results show that the adsorption process is fast and that it reaches equilibrium at about 20 min. The experimental data for the adsorption systems fit well to a pseudo second-order equation and chemical adsorption is the main adsorption process. The fiber can be regenerated and repeatedly used for the adsorption of Cr(VI).



Key wordsAdsorption kinetics      Anion exchange fiber      Polyamine      Cr(VI)      Rate constant     
Received: 04 May 2009      Published: 25 August 2009
MSC2000:  O642  
Corresponding Authors: FENG Chang-Gen     E-mail: cgfeng@wuma.com.cn
Cite this article:

SUN Xiao-Li, ZENG Qing-Xuan, FENG Chang-Gen. Adsorption Kinetics of Chromium (VI) onto an Anion Exchange Fiber Containing Polyamine. Acta Physico-Chimica Sinica, 2009, 25(10): 1951-1957.

URL:

http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/10.3866/PKU.WHXB20090938     OR     http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/Y2009/V25/I10/1951

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