物理化学学报 >> 2010, Vol. 26 >> Issue (02): 367-372.doi: 10.3866/PKU.WHXB20100221

催化和表面结构 上一篇    下一篇

萘在粘胶基活性炭纤维上的吸附

张天永, 杨秋生, 史慧贤, 韩聪, 刘旭   

  1. 天津大学化工学院, 天津 300072; 福建省光催化重点实验室——省部共建国家重点实验室培育基地, 福州大学, 福州 350002
  • 收稿日期:2009-06-30 修回日期:2009-12-02 发布日期:2010-01-26
  • 通讯作者: 张天永 E-mail:tyzhang@tju.edu.cn

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

摘要:

研究了水溶液中萘在粘胶基活性炭纤维(VACF)吸附剂上的等温吸附. 用多种吸附方程(Langmuir、Freundlich、Dubinin-Radushkevitch (D-R)、Dubinin-Astalov (D-A)、Langmuir-Freundlich (L-F)、Redlich-Peterson (R-P))对吸附实验数据进行拟合, 考察了温度、pH和负载铜离子对萘吸附的影响. 方程拟合结果表明微孔吸附容积填充理论对VACF吸附萘有较好的适用性, 优于单层吸附理论. 在20-40 ℃之间, 萘的吸附是自发进行的, 30 ℃以上时, 萘的吸附量显著降低. 提出了新的机理来解释pH较低时吸附量显著上升的实验现象. 负载铜离子后VACF对萘吸附量降低.

关键词: 吸附, 活性炭纤维, 萘, 吸附方程, 铜离子

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