Iranian Nanotechnology Society International Journal of Nanoscience and Nanotechnology 1735-7004 8 2 2012 06 01 Magnetic Multi-Walled Carbon Nanotube as an Adsorbent for Toluidine Blue O Removal from Aqueous Solution 79 86 3908 EN F. Hamidi Malayeri Department of Biophysics, Institute of Biochemistry and Biophysics, University of Tehran, Tehran, I. R. Iran Department of Chemistry, Islamic Azad University, North Tehran Branch, Tehran, I. R. Iran M. R. Sohrabi Department of Chemistry, Islamic Azad University, North Tehran Branch, Tehran, I. R. Iran H. Ghourchian - Department of Biophysics, Institute of Biochemistry and Biophysics, University of Tehran, Tehran, I. R. Iran Nanobiomedicine Center of Excellence, Nanoscience and Nanotechnology Research Center, University of Tehran, Tehran, I. R. Iran Journal Article 2012 04 01 Toluidine Blue O (TBO) is a cationic dye which is extensively used in the industries. In the present paper a simple and efficient wet chemical method was introduced for removal of TBO from waste aqueous solution. Magnetic multi-walled carbon nanotubes were synthesized using commercially available multi-wall carbon nanotubes and magnetic iron oxide nanoparticles which were examined for removal of TBO. The magnetic adsorbents were easily manipulated using an external magnetic field for desired separation, causing the removal of dyes from polluted water. The experimental results revealed that after 30 min, the separation process for TBO absorption reaches to equilibrium at pH 7.0. The optimum condition for removal of TBO was reported.  https://www.ijnnonline.net/article_3908_576d026223582a390cd323bef4bad026.pdf