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Journal of Nanomaterials
Volume 2014 (2014), Article ID 571745, 9 pages
http://dx.doi.org/10.1155/2014/571745
Research Article

Removal and Adsorption of p-Nitrophenol from Aqueous Solutions Using Carbon Nanotubes and Their Composites

1Research and Development Center, China Tobacco Hunan Industrial Corporation, Changsha, Hunan 410014, China
2College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China
3College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, China

Received 9 April 2014; Revised 1 June 2014; Accepted 11 June 2014; Published 2 July 2014

Academic Editor: Shadi A. Dayeh

Copyright © 2014 Yuan-Xiang Yao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In an attempt to explore the possibility of using carbon nanotubes (CNTs) as efficient adsorbents for removal of pollutants from the contaminated water, the adsorption of p-nitrophenol (PNP) on raw multiwalled carbon nanotubes (r.MWNTs) with different outer diameters, various functionalized multiwalled carbon nanotubes (f-MWNTs), raw single-walled carbon nanotubes (r.SWNTs) and oxidized single-walled carbon nanotubes (ox-SWNTs) has been investigated. The ox-SWNTs showed better adsorption ability for PNP with different concentrations, while lower uptake capacity was found for all of the r.MWNTs and f-MWNTs. The removal efficiency of PNP by ox-SWNTs was around 98%, indicating that ox-SWNTs possess a great potential application prospect for removing PNP from aqueous solutions.