Surface complexation modeling of Sr(II) and Eu(III) adsorption onto oxidized multiwall carbon nanotubes

被引：161

作者：

Chen, Changlun ^{[1
]}

Hu, Jun ^{[1
]}

Xu, Di ^{[1
]}

Tan, Xiaoli ^{[1
]}

Meng, Yuedong ^{[1
]}

Wang, Xiangke ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2008年 / 323卷 / 01期

基金：

中国国家自然科学基金;

关键词：

multiwall carbon nanotubes; adsorption; Sr(II); Eu(III); surface complexation;

D O I：

10.1016/j.jcis.2008.04.046

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：

Acid-base titrations of oxidized multiwall carbon nanotubes (MWCNTs), Sr(II) and Eu(III) adsorptions onto oxidized MWCNTs were conducted to investigate the Surface charge characteristics of oxidized MWCNTs and the surface complexation interactions between Sr(II)/Eu(III) and oxidized MWCNTs. The results suggested that Sr(II) and Eu(III) adsorptions onto oxidized MWCNTs increased with increasing pH, and decreased with increasing ionic strength, and the affinity of oxidized MWCNTs for Eu(III) was much higher than that for Sr(II). The diffuse layer model (DLM) fitted the experimental data of Sr(II) and Eu(III) adsorptions well with the aid of FITEQL 3.2. (C) 2008 Elsevier Inc. All rights reserved.

引用

页码：33 / 41

页数：9

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