DBSA doped polyaniline/multi-walled carbon nanotubes composite for high efficiency removal of Cr(VI) from aqueous solution

被引：106

作者：

Kumar, Rajeev ^{[1
]}

Ansari, Mohd Omaish ^{[2
]}

Barakat, M. A. ^{[1
,3
]}

机构：

[1] King Abdulaziz Univ, Fac Meteorol Environm & Arid Land Agr, Dept Environm Sci, Jeddah 21589, Saudi Arabia

[2] Yeungnam Univ, Sch Chem Engn, Gyongsan 712749, Gyeongbuk, South Korea

[3] Cent Met R&D Inst, Cairo 11421, Egypt

来源：

CHEMICAL ENGINEERING JOURNAL | 2013年 / 228卷

关键词：

Polyaniline/MWCNTs composite; Adsorption; Chromium; Kinetics; Isotherm; Thermodynamics; HEXAVALENT CHROMIUM; MULTIWALL CARBON; ACTIVATED CARBON; ADSORPTION; EQUILIBRIUM; BIOSORPTION; ADSORBENTS; KINETICS; SORPTION; PB(II);

D O I：

10.1016/j.cej.2013.05.024

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Dodecyl-benzene-sulfonic-acid (DBSA) doped polyaniline/multi-walled carbon nanotubes (DP/MWCNTs) nanocomposite was prepared by in situ oxidative polymerization. DP/MWCNTs was found to be ideal adsorbent for the removal of Cr(VI) as compared to pristine and oxidized MWCNTs. The adsorption of Cr(VI) onto DP/MWCNTs was found to be strongly dependent on the solution pH. The rate of Cr(VI) adsorption increased with the increase in solution temperature and followed pseudo-second order kinetics. The adsorption isotherm of Cr(VI) onto DP/MWCNTs fitted the Freundlich isotherm model and maximum monolayer adsorption capacity was found to be 55.55 mg g(-1). The values of thermodynamic parameters suggested that adsorption was spontaneous and endothermic in nature. The desorption of Cr(VI) was found to increase with the increase in solution pH and temperature. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：748 / 755

页数：8

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