Assessing of removal efficiency of Indigo carmine from wastewater using MWCNTs

Document Type : Regular Paper

Authors

1 Department of the Environment, College of Basic Sciences, Hamedan Branch, Islamic Azad University, Hamedan, Iran

2 Department of the Environment, Hamedan Branch, Islamic Azad University, Hamedan, Iran

3 Department of Chemistry, Hamedan Branch, Islamic Azad University, Hamedan, Iran

4 Young Researchers and Elite Club, Hamedan Branch, Islamic Azad University, Hamedan, Iran

Abstract

Multi-walled carbon nanotubes (MWCNTs) were oxidized for removal of indigo carmine (IC) from aqueous solution through batch experiment. The effects of contact time, temperature, pH and dosage of adsorbent on the removal of indigo carmine were investigated. The optimal pH for maximum dye adsorption was found to be 5.0. The adsorption kinetic of IC dye onto oxidized MWCNTs fitted the pseudo-second-order model and the equilibrium experimental results showed good correlation with Freundlich model. The maximum adsorption capacity for indigo carmine was obtained as 71.42 mg g-1.

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Iranian Journal of Science

Articles in Press, Accepted Manuscript
Available Online from 15 March 2016

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