文献类型：期刊文献

英文题名：Kinetics and equilibriums for adsorption of poly(vinyl alcohol) from aqueous solution onto natural bentonite

作者：Wang, Weishan[1];Zheng, Baicun[1];Deng, Zuiliang[2];Feng, Zhongjun[2];Fu, Lefeng[2]

机构：[1]E China Univ Sci & Technol, Res & Dev Ctr Sports Mat, Shanghai 200237, Peoples R China;[2]Shanghai Sunrise Polymer Co Ltd, Shanghai 200232, Peoples R China

年份：2013

卷号：214

起止页码：343

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20130215899799);WOS:【SCI-EXPANDED(收录号:WOS:000315322700042)】；

基金：The financial support (11nm0501900, 10DZ2290600) from Science and Technology Commission of Shanghai Municipality was gratefully acknowledged. The research was also partially supported by the science and technology cooperation project between Yunnan Province and University/China Academy (2009AD008).

语种：英文

外文关键词：PVA; Bentonite; Adsorption; kinetics; Isotherm; Zeta potential

摘要：Kinetics and isotherms for the adsorption of poly(vinyl alcohol) (PVA) from aqueous solution onto natural bentonite were investigated systematically with respect to initial concentration, contact time and temperature. The kinetics of the adsorption process were discussed using three kinetic models, viz., pseudo-first-order, pseudo-second-order, and intraparticle diffusion kinetic model. The experimental data fitted well with pseudo-second-order kinetic model. The adsorption isotherms were also described by Langmuir, Freundlich and Dubinin-Radushkevich (D-R) isotherm model, respectively. It was found that the isotherms obeyed Langmuir model. FTIR results indicated the presence of PVA on the surface of bentonite/PVA complexes. XRD measurements showed that PVA molecules intercalated into the inter-layers of bentonite. Zeta potential of bentonite particles decreased with increasing PVA concentration. (C) 2012 Elsevier B.V. All rights reserved.