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Separation of a heavy metal from water through a membrane containing boron nitride nanotubes: molecular dynamics
Jafar Azamat1, Alireza Khataee, Sang Woo Joo
1Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-14766, Tabriz, Iran.
Abstract:
Molecular dynamics simulations were performed to investigate the separation of zinc ions as a heavy metal from water using boron nitride nanotubes. The studied systems included boron nitride (BN) nanotubes embedded in a silicon-nitride membrane immersed in an aqueous solution of ZnCl2. An external electric field was applied to the system along the axis of the BN nanotubes. The results show that the (7,7) and (8,8) BN nanotubes were exclusively selective of ions. The (7,7) BN nanotube selectively conducted Zn(2+) ions, while the (8,8) BN nanotube selectively conducted Cl(-) ions. The results were confirmed using additional simulated parameters. The results indicate that the passage of ions through nanotubes is related to the diameter of the BN nanotubes.
