Removal of Methyl Orange by Modified Halloysite Nanotubes

被引：44
作者：
Liu, Ruichao [2 ]
Fu, Keming [1 ]
Zhang, Bing [1 ,2 ]
Mei, Dandan [2 ]
Zhang, Haoqin [2 ]
Liu, Jindun [2 ]
机构：
[1] Zhengzhou Univ, Sch Chem Engn, Zhengzhou 450001, Peoples R China
[2] JiaozuoUniv, Sch Chem Engn, Jiaozuo, Peoples R China
来源：
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY | 2012年 / 33卷 / 05期
基金：
中国国家自然科学基金; 国家高技术研究发展计划(863计划);
关键词：
Anionic dye; halloysite nanotubes; methyl orange; removal; CONTROLLED-RELEASE; AQUEOUS-SOLUTION; CLAY NANOTUBES; BASIC-DYES; FLY-ASH; ADSORPTION; EQUILIBRIUM; VIOLET; RED; ISOTHERMS;
D O I：
10.1080/01932691.2011.579855
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：
The halloysite nanotubes (HNTs) were modified with the surfactant of hexadecyltrimethylammonium bromide (HDTMA) to form a new adsorbent. The modified HNTs were characterized by the FTIR spectra and thermogravimetric analysis. The results showed that quaternary ammonium cations were grafted on the nanotubes surface successfully. The modified HNTs were used as adsorbent to remove anionic dye of methyl orange (MO) from aqueous solution. The effect of adsorbent dose, initial pH, contact time, initial concentration, ionic strength, and temperature were investigated. The adsorbent exhibited rapid adsorption rate and relatively high adsorption capacity of 91.74 mg/g for MO. The adsorption capacity of the adsorbent increased significantly with the increase of initial concentration, decreased with the increase of ionic strength, and varied little with temperature. Batch kinetic experiments showed that the adsorption fitted pseudo-second-order kinetic model well with correlation coefficients greater than 0.9999. The equilibrium isotherm data were well described by the Langmuir model. The regeneration of modified HNTs could be realized by eluents and the recovered adsorbent could be used again for MO removal. Due to its low cost, high adsorption capacity, and fast adsorption rate, HNTs could be used as an effective adsorbent for MO dye removal.
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页码：711 / 718
页数：8
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