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

页码：135 / 139

页数：5

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