Monoaromatic Pollutant Removal by Carbon Nanotubes from Aqueous Solution

Abstract:

The removal of monoaromatic (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/l, concentration of 10-100 mg/l, 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 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.

• Periodical: Advanced Materials Research (Volumes 488-489)
• Pages: 934-939
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.488-489.934
• Online since: March 2012
• Authors: Hamidreza Pourzamani, Bijan Bina, Mohammad Mehdi Amin, Alimorad Rashidi
• Keywords: Benzene, Carbon Nanotube (CN), Isofit, Toluene

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