Removal of Cd2+ from aqueous solution with carbon modified aluminum-pillared montmorillonite

被引：31
作者：
Yu, Ranbo [2 ]
Wang, Shengdong [2 ]
Wang, Dan [1 ]
Ke, Jiajun [1 ]
Xing, Xianran [2 ]
Kumada, Nobuhiro [3 ]
Kinomura, Nobukazu [3 ]
机构：
[1] Chinese Acad Sci, Inst Proc Engn, State Key Lab Multi Phase & Complex Syst, Beijing 100190, Peoples R China
[2] Univ Sci & Technol, Dept Phys Chem, Beijing 100083, Peoples R China
[3] Yamanashi Univ, Fac Engn, Ctr Crystal Sci & Technol, Yamanashi 4008511, Japan
来源：
CATALYSIS TODAY | 2008年 / 139卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
Pillared montmorillonite; Carbon modification; Cd2+ removal; Kinetics;
D O I：
10.1016/j.cattod.2008.08.015
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
To clarify the effect and mechanism of pillared montmorillonite on Cd2+ adsorption in aqueous solution, carbon modified alumina-pillared montmorillonite has been prepared by incorporating hydroxyl-aluminum cations into the lamellar spaces of montmorillonite via ion-exchanging together with polyvinyl alcohol (PVA), followed by calcining in N-2 atmosphere. The pillared montmorillonites were characterized by XRD, FT-IR, TG-DTA and sorption isotherms. Uptake of Cd2+ from aqueous solution was analyzed by means of atomic absorption spectroscopy. The experimental results indicated that the pillared montmorillonites show better properties on both Cd2+ adsorption and desorption than the unpillared, which made them the promising recycling Cd2+ adsorbents. Moreover, adjusting the pH value of the solution could control the adsorbed amount of Cd2+. The adsorption process fitted the second-order kinetics well, and the two isotherm equations due to Freundlich and Langmuir showed good fits with the experimental data. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：135 / 139
页数：5
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