Springer Iranian Journal of Science and Technology (Sciences) 1028-6276 Articles in Press 2016 03 15 Assessing of removal efficiency of Indigo carmine from wastewater using MWCNTs 3635 10.22099/ijsts.2016.3635 EN Soheil Sobhan Ardakani Department of the Environment, College of Basic Sciences, Hamedan Branch, Islamic Azad University, Hamedan, Iran Mehrnaz Ghoochian Department of the Environment, Hamedan Branch, Islamic Azad University, Hamedan, Iran Saeed Jamehbozorgi Department of Chemistry, Hamedan Branch, Islamic Azad University, Hamedan, Iran Raziyeh Zandipak Young Researchers and Elite Club, Hamedan Branch, Islamic Azad University, Hamedan, Iran Journal Article 2015 08 27 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.