Removal of arsenic(V) from aqueous solutions using 3-[2-(2-aminoethylamino)ethylamino]propyl-trimethoxysilane functionalized silica gel adsorbent

被引：56

作者：

Fan, Hong-Tao ^{[1
,2
]}

Sun, Ting ^{[1
]}

Xu, Hong-Bo ^{[3
]}

Yang, Yan-Jie ^{[2
]}

Tang, Qi ^{[2
]}

Sun, Yang ^{[2
]}

机构：

[1] Northeastern Univ, Dept Chem, Shenyang 110004, Peoples R China

[2] Shenyang Univ Chem Technol, Coll Appl Chem, Shenyang 110142, Peoples R China

[3] Univ Sci & Technol Liaoning, Coll Chem Engn, Anshan 114051, Peoples R China

来源：

DESALINATION | 2011年 / 278卷 / 1-3期

基金：

中国国家自然科学基金;

关键词：

Arsenic; 3-[2-(2-Aminoethylamino)ethylamino]propyl-trimethoxysilane Removal; Silica gel; ACTIVATED CARBONS; ADSORPTION; SORBENT; TOXICITY; WATER;

D O I：

10.1016/j.desal.2011.05.028

中图分类号：

TQ [化学工业];

学科分类号：

081705 [工业催化];

摘要：

The 3-[2-(2-aminoethylamino)ethylamino]propyl-trimethoxysilane(AAAPTS) functionalized silica gel (AAAPTS/SiO2) was synthesized and used as a potential adsorbent for the As(V) removal from aqueous solutions. AAAPTS/SiO2 was characterized by IR, nitrogen adsorption and point of zero charge (pH,) measurements. The adsorption behaviors of As(III) and As(V), adsorption isotherms and dynamics of As(V) on AAAPTS/SiO2 adsorbent were investigated. It was found that As(V) could be selectively adsorbed on AAAPTS/SiO2 adsorbent within pH of 2.7-9.2, while As(III) could not be absorbed in the studied pH range. Equilibrium data fitted perfectly with Langmuir isotherm model compared to Freundlich isotherm model, and the maximum adsorption capacity was 13.9 mg.g(-1) for the AAAPTS/SiO2 adsorbent. Kinetic studies indicated that sorption followed a pseudo-second-order model. The results showed that AAAPTS/SiO2 adsorbent could be employed as an effective material for the removal of As(V) from aqueous solutions. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：238 / 243

页数：6

共 35 条

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