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Benzene and Toluene Removal by Carbon Nanotubes Fromaqueous Solution



Bina B1 ; Amin MM1 ; Rashidi A2 ; Pourzamani H1
Authors
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Authors Affiliations
  1. 1. Environment Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
  2. 2. Gas Division, Research Institute of Petroleum Industry (RIPI), Teheran, Iran

Source: Archives of Environmental Protection Published:2012

Abstract

The removal of benzene (B) and toluene (T) from aqueous solution by multi walled, single walled, and hybrid carbon nanotubes (MWCNTs, SWCNTs, and HCNTs) was evaluated for a nanomaterial dose of 1 g/1, concentration of 10-100 mg/1, and pH 7. The equilibrium amount removed by SWCNTs (B: 9.98 mg/g and T: 9.96 mg/g) was higher than for MWCNTs and HCNTs. Toluene has a higher adsorption tendency on CNTs than benzene, which is related to the increasing water solubility and the decreasing molecular weight of the compounds. The SWCNTs performed better for B and T sorption than the MWCNTs and HCNTs. Isotherms study based on isofit program indicate that the Generalized Langmuir-Freundlich (GLF) isotherm expression provides the best fit for benzene sorption, and that Brunauer-Emmett-Teller (BET) isotherm is the best fit for toluene adsorption by SWCNT. SWCNTs are efficient B and T adsorbents and possess good potential applications to water and wastewater treatment and maintain water of high quality that could be used for cleaning up environmental pollution. ©Copyright by Polish Academy of Sciences and Institute of Environmental Engineering of the Polish Academy of Sciences, Zabrze,. Poland 2012.
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