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Multilayer Graphene Oxide Membrane in Forward Osmosis: Molecular Insights

A. Gogoi,K. Anki Reddy,P. Mondal

Published 2018 in ACS Applied Nano Materials

ABSTRACT

We investigate the performance of layered graphene oxide (GO) membrane in forward osmosis (FO) process for seawater desalination via nonequilibrium molecular dynamics (MD) simulations. A 0.56 M NaCl solution is used as the feed solution and a mixture of 1.0 M MgCl2 and 0.05 M Al2(SO4)3 solution is used as a draw solution. The effect of internal structure of the layered GO membrane on its performance as a FO membrane is investigated by considering three different membrane configurations which differ in their pore offset distance W. The dynamics of the permeating water and ions through the layered GO membrane is also investigated. Increase in W reduces the water permeability of the layered GO membrane and increases its salt rejection. One of the reason for this could be the blockage of permeate pathways through the layered GO membrane due to the movement of the GO nanosheets. This becomes more prominent with increasing W. Increasing W also leads to increase in distance traversed by the permeating water mole...

PUBLICATION RECORD

  • Publication year

    2018

  • Venue

    ACS Applied Nano Materials

  • Publication date

    2018-08-21

  • Fields of study

    Materials Science, Chemistry, Engineering, Environmental Science

  • Identifiers
    DOI 10.1021/ACSANM.8B00709
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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