Adsorption properties and mechanism of mesoporous adsorbents prepared with fly ash for removal of Cu(II) in aqueous solution

被引：34
作者：
Wu, Xiu-Wen [1 ,2 ]
Ma, Hong-Wen [2 ]
Zhang, Lin-Tao [2 ]
Wang, Feng-Jiao [2 ]
机构：
[1] China Univ Geosci, Sch Sci, Beijing 100083, Peoples R China
[2] China Univ Geosci, Natl Lab Mineral Mat, Beijing 100083, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2012年 / 261卷
关键词：
Adsorption; Cu(II); Mesoporous materials; Fly ash; Adsorption mechanism; COPPER; IONS;
D O I：
10.1016/j.apsusc.2012.08.122
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Mesoporous materials were hydrothermally prepared from fly ash in an alkaline condition with cetyltrimethylammonium bromide as synthesis directing agent. The structural properties of the mesoporous materials were characterized by X-ray powder diffraction, high-resolution transmission electron microscope, and N-2 adsorption. The chemical contents of SiO2 in the mesoporous materials were determined by spectrometry of the silicone molybdenum and sulfosalicylic acid complexes, and A(l)2O(3) determined by complexometry with Ethylene Diamine Tetraacetic Acid in the presence of KF-Zn(Ac)(2) tests. The removal of Cu(II) was studied under equilibrium and dynamic conditions, and the influence of the Al:Si molar ratio were also considered. The equilibrium data were fitted to Freundlich and Langmuir models and the models parameters were evaluated. The adsorption mechanism was clarified with the Dubnin-Radushkevich isotherm. (C) 2012 Elsevier B. V. All rights reserved.
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收藏
页码：902 / 907
页数：6
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