Adsorption kinetics, isotherms and thermodynamics of atrazine on surface oxidized multiwalled carbon nanotubes

被引：135

作者：

Chen, Guang-Cai ^{[1
,2
]}

Shan, Xiao-Quan ^{[1
]}

Zhou, Yi-Quan ^{[2
]}

Shen, Xiu-e ^{[1
]}

Huang, Hong-Lin ^{[1
]}

Khan, Shahamat U. ^{[3
]}

机构：

[1] Chinese Acad Sci, Ecoenvironm Sci Res Ctr, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China

[2] Chinese Acad Forestry, Res Inst Subtrop Forestry, Fuyang 311400, Zhejiang, Peoples R China

[3] George Mason Univ, Dept Chem & Biochem, Fairfax, VA 22030 USA

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2009年 / 169卷 / 1-3期

基金：

中国国家自然科学基金;

关键词：

Adsorption; Atrazine; Carbon nanotubes; Kinetics; Thermodynamics; AQUEOUS-SOLUTIONS; DEGRADATION-PRODUCTS; SORPTION; WATER; DESORPTION; NONPOLAR; REMOVAL; CADMIUM; SOILS; POLAR;

D O I：

10.1016/j.jhazmat.2009.04.034

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The adsorption kinetics, isotherms and thermodynamic of atrazine on multiwalled carbon nanotubes (MWCNTs) containing 0.85%, 2.16%, and 7.07% oxygen was studied. Kinetic analyses were performed using pseudo-first-order, pseudo-second-order and intraparticle diffusion models. The regression results showed that the pseudo-second-order law fit the adsorption kinetics. The calculated thermodynamic parameters indicated that adsorption of atrazine on MWCNTs was spontaneous and exothermic. Standard free energy (Delta G(0)) became less negative when the oxygen content of MWCNTs increased from 0.85% to 7.07% which is consistent with the low adsorption affinity of MWCNTs for atrazine. (c) 2009 Elsevier B.V. All rights reserved.

引用

页码：912 / 918

页数：7

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