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Water Desalination By A Designed Nanofilter Of Graphene-charged Carbon Nanotube: A Molecular Dynamics Study

S. Rikhtehgaran, A. Lohrasebi
Published 2015 · Materials Science

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Abstract Using molecular dynamics simulations, we show that a designed graphene-charged carbon nanotube (CNT) membrane can act as a nanofilter with the efficiency more than 90%, to separate Na + /Mg + 2 /Fe + 3 and Cl − ions from NaCl, MgCl 2 and FeCl 3 solutions. It is observed that there are two significant factors in ion separation process: the magnitude of charge density which covers the surface of the CNT and the velocity of the movable wall. The ion separation is improved by increasing the magnitude of surface charge density and decreasing the velocity of the movable wall. Also, it is found that, reducing the positive surface charge of the CNT will increase the percentage of passed water molecules through the CNT.
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