Removal of acid dyes from aqueous media by adsorption onto amino-functionalized nanoporous silica SBA-3

被引：210

作者：

Anbia, Mansoor ^{[1
]}

Salehi, Samira ^{[1
]}

机构：

[1] Iran Univ Sci & Technol, Fac Chem, Res Lab Nanoporous Mat, Tehran 16846, Iran

来源：

DYES AND PIGMENTS | 2012年 / 94卷 / 01期

关键词：

Adsorption; Acid dyes; Amino-functionalized SBA-3; Mesoporous; Freundlich isotherm; Nano adsorbent; MESOPOROUS SILICA; ACTIVATED CARBON; SURFACTANT; ADSORBENTS; SEPARATION; COPOLYMER; TRIBLOCK; ION;

D O I：

10.1016/j.dyepig.2011.10.016

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Adsorption of acid dyes on SBA-3 ordered mesoporous silica, ethylenediamine functionalized SBA-3 (SBA-3/EDA), aminopropyl functionalized SBA-3 (SBA-3/APTES) and pentaethylene hexamine functionalized SBA-3 (SBA-3/PEHA) materials has been studied. The structural order and textural properties of the synthesized materials have been studied by XRD, FT-IR and nitrogen adsorption-desorption analysis. The adsorption capacity of the adsorbents varies in the following order: SBA-3/PEHA > SBA-3/APTES > SBA-3/EDA > SBA-3. The SBA-3/PEHA is found to have the highest adsorption capacity for all acid dyes. The adsorption mechanism which is based on electrostatic attraction and hydrogen bonding is described. Batch studies were performed to study the effect of various experimental parameters such as chemical modification, contact time, initial concentration, adsorbent dose, agitation speed, solution pH and reaction temperature on the adsorption process. The Langmuir and Freundlich isotherm models have been applied and the Freundlich model was found to be fit with the equilibrium isotherm data. Kinetics of adsorption follows the second-order rate equation. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：1 / 9

页数：9

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