Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (02): 367-372.doi: 10.3866/PKU.WHXB20100221

• CATALYSIS AND SURFACE STRUCTURE • Previous Articles     Next Articles

Adsorption of Naphthalene on a Viscose-Based Activated Carbon Fiber

ZHANG Tian-Yong, YANG Qiu-Sheng, SHI Hui-Xian, HAN Cong, LIU Xu   

  1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China; State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University Fuzhou 350002, P. R. China
  • Received:2009-06-30 Revised:2009-12-02 Published:2010-01-26
  • Contact: ZHANG Tian-Yong E-mail:tyzhang@tju.edu.cn

Abstract:

We studied the isothermal adsorption of naphthalene on a viscose-based activated carbon fiber (VACF) in aqueous solution. The adsorption experimental data were fitted to adsorption equations such as the Langmuir, Freundlich, Dubinin-Radushkevitch(D-R), Dubinin-Astalov(D-A), Langmuir-Freundlich(L-F), and Redlich-Peterson (R-P) equations. The effects of temperature, pH, and pre-loaded copper ions on the VACF on the adsorption of naphthalene were investigated. The fitting results show that the micropore volume filling theory fits better than the single-layer adsorption theory for naphthalene adsorption onto VACF. The adsorption of naphthalene occurs spontaneously between 20 and 40 ℃. The adsorption capacity of VACF for naphthalene decreases significantly above 30 ℃. A new mechanism is proposed to explain why the adsorption capacity increases significantly in lower pH aqueous solutions. The reduction of naphthalene takes place on the VACF with pre-loaded copper ions.

Key words: Adsorption, Activated carbon fiber, Naphthalene, Adsorption equation, Copper ion

MSC2000: 

  • O647