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Magnetite decorated multi-walled carbon nanotubes for removal of toxic dyes from aqueous solutions

  • Özge KerkezEmail author
  • Şahika Sena Bayazit
Research Paper

Abstract

The removal of malachite green (MG) and rhodamine B (RB) from aqueous solutions was studied by batch adsorption technique using Fe3O4/MWCNT. Fe3O4/MWCNT adsorbent was synthesized by co-precipitation method and characterized by XRD, SEM, and TGA. 94 % MG removal and 98 % RB removal were achieved in 80 min using 10 mg adsorbent, at pH 6 and 298 K. The effects of adsorbent amount, pH, initial dye concentration, contact time, and temperature were investigated. Equilibrium data were well fitted by Langmuir adsorption model and pseudo-second-order kinetic model. MG adsorption on Fe3O4/MWCNT is exothermic and RB adsorption is endothermic in nature.

Keywords

Magnetic separation Carbon nanotubes Dye adsorption Health and environmental effects Remediation 

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Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  1. 1.Chemical Engineering Department, Faculty of Engineering and ArchitectureBeykent UniversityIstanbulTurkey

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