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Bioinorganic Chemistry and Applications - Volume 2017 2017, Article ID 2853925, 11 pages - https:-doi.org-10.1155-2017-2853925

Research Article

Department of Chemical Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia

Department of Chemical Engineering, University of Engineering and Technology, Lahore 54890, Pakistan

Correspondence should be addressed to Basim Ahmed Abussaud

Received 1 January 2017; Accepted 15 February 2017; Published 12 March 2017

Academic Editor: Viktor Kochkodan

Copyright © 2017 Aamir Abbas 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

Multiwall carbon nanotubes CNTs and iron oxide impregnated carbon nanotubes CNTs-iron oxide were investigated for the adsorption of hazardous toluene and paraxylene p-xylene from aqueous solution. Pure CNTs were impregnated with iron oxides nanoparticles using wet impregnation technique. Various characterization techniques including thermogravimetric analysis, scanning electron microscopy, elemental dispersion spectroscopy, X-ray diffraction, and nitrogen adsorption analysis were used to study the thermal degradation, surface morphology, purity, and surface area of the materials. Batch adsorption experiments show that iron oxide impregnated CNTs have higher degree of removal of p-xylene i.e., 90% compared with toluene i.e., 70%, for soaking time 2 h, with pollutant initial concentration 100 ppm, at pH 6 and shaking speed of 200 rpm at 25°C. Pseudo-second-order model provides better fitting for the toluene and p-xylene adsorption. Langmuir and Freundlich isotherm models demonstrate good fitting for the adsorption data of toluene and p-xylene.





Autor: Aamir Abbas, Basim Ahmed Abussaud, Ihsanullah, Nadhir A. H. Al-Baghli, and Halim Hamid Redhwi

Fuente: https://www.hindawi.com/



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