Removal of V(V) ions from aqueous solutions using oxidized multi-walled carbon nanotubes

Abstract

Research Article| February 03 2015 Removal of V(V) ions from aqueous solutions using oxidized multi-walled carbon nanotubes S. Sobhanardakani; S. Sobhanardakani 1Department of the Environment, Hamedan Branch, Islamic Azad University, Hamedan, Iran Search for other works by this author on: This Site PubMed Google Scholar R. Zandipak; R. Zandipak 2Young Researchers & Elite Club, Hamedan Branch, Islamic Azad University, Hamedan, Iran Search for other works by this author on: This Site PubMed Google Scholar Z. Fili; Z. Fili 2Young Researchers & Elite Club, Hamedan Branch, Islamic Azad University, Hamedan, Iran Search for other works by this author on: This Site PubMed Google Scholar M. Ghoochian; M. Ghoochian 2Young Researchers & Elite Club, Hamedan Branch, Islamic Azad University, Hamedan, Iran Search for other works by this author on: This Site PubMed Google Scholar R. Sahraei; R. Sahraei 3Department of Chemistry, Ilam University, Ilam, Iran Search for other works by this author on: This Site PubMed Google Scholar A. Farmany A. Farmany 4Department of Chemistry, Hamedan Branch, Islamic Azad University, Hamedan, Iran E-mail: [email protected] Search for other works by this author on: This Site PubMed Google Scholar Journal of Water Supply: Research and Technology-Aqua (2015) 64 (4): 425–433. https://doi.org/10.2166/aqua.2015.053 Article history Received: April 16 2014 Accepted: December 16 2014 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Cite Icon Cite Permissions Search Site Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll JournalsThis Journal Search Advanced Search Citation S. Sobhanardakani, R. Zandipak, Z. Fili, M. Ghoochian, R. Sahraei, A. Farmany; Removal of V(V) ions from aqueous solutions using oxidized multi-walled carbon nanotubes. Journal of Water Supply: Research and Technology-Aqua 1 June 2015; 64 (4): 425–433. doi: https://doi.org/10.2166/aqua.2015.053 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex In this paper, multi-walled carbon nanotubes (MWCNTs) were oxidized and used as an adsorbent for the removal of vanadium (V(V)) ions from aqueous solution. Oxidized MWCNTs were characterized by scanning electron microscope and Brunauer–Emmett–Teller measurements. The effects of various parameters such as solution pH (1.0–8.0), adsorbent dose (0.001–0.08 g), contact time (7.0–150 min), and temperature (25–55 °C) were investigated. The results demonstrated that the maximum percentage of V(V) adsorption was found at pH 5.0 and 90 min contact time with 0.03 g oxidized MWCNTs. Kinetic adsorption data were analyzed using the first-order model and the pseudo-second-order model. The regression results showed that the adsorption kinetics were more accurately represented by the pseudo-second-order model. The equilibrium data in aqueous solutions were fitted to Langmuir, Freundlich, and Tempkin isotherms and the equilibrium adsorption of V(V) was best described by the Freundlich isotherm model. adsorption, oxidized multi-walled carbon nanotube, removal efficiency, vanadium © IWA Publishing 2015 You do not currently have access to this content.