Membrane and Water Treatment

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Removal of Cd(II) from water using carbon, boron nitride and silicon carbide nanotubes

  • Azamat, Jafar (Department of Chemical Engineering, Ahar Branch, Islamic Azad University) ;
  • Hazizadeh, Behzad (Department of Chemical Engineering, Ahar Branch, Islamic Azad University)
  • Received : 2017.06.17
  • Accepted : 2017.11.13
  • Published : 2018.01.25
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Abstract

Molecular dynamics simulations were used to study the removal of Cd(II) as a heavy metal from wastewater using armchair carbon nanotube, boron nitride nanotube and silicon carbide nanotubes under applied electric field. The system contains an aqueous solution of $CdCl_2$ as a heavy metal and a (7,7) nanotube as a nanostructured membrane, embedded in a silicon nitride membrane. An external electric field was applied to the considered system for the removal of $Cd^{2+}$ through nanotubes. The simulation results show that in the same conditions, considered armchair nanotubes were capable to remove $Cd^{2+}$ from wastewater with different ratios. Our results reveal that the removal of heavy metals ions through armchair carbon, boron nitride and silicon carbide nanotubes was attributed to the applied electric field. The selective removal phenomenon is explained with the calculation of potential of mean force. Therefore, the investigated systems can be recommended as a model for the water treatment.

Keywords

Acknowledgement

Supported by : Ahar Branch Islamic Azad University, Iranian Nanotechnology Initiative Council

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