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Enhancing water desalination in graphene-based membranes via an oscillating electric field

Mortazavi, V ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1016/j.desal.2020.114672
  3. Publisher: Elsevier B.V , 2020
  4. Abstract:
  5. Water desalination methods on the basis of newly developed graphene-based membrane have been introduced as a more efficient alternative for the conventional water purification technologies such as classical thermal desalination and reverse osmosis (RO). However, the increase of water permeation rate and ion rejection are still the main subjects in this field. In this study, a new method based on using oscillating electric field is proposed to improve the performance of nanoporous graphene. The effects of the amplitude and oscillation frequency of the electric field and the pore size of the membrane on the water permeation and salt rejection are studied by conducting molecular dynamics simulations. The results of this research reveal that by applying oscillating electric field with proper amplitude and frequency, water flow rate will be increased by 59.6% with the ion rejection of 100% compared to the case with no electric field. © 2020 Elsevier B.V
  6. Keywords:
  7. Molecular dynamics simulation ; Nanoporous graphene ; Oscillating electric field ; Salt rejection ; Water desalination ; Electric field effects ; Flow of water ; Graphene ; Molecular dynamics ; Permeation ; Pore size ; Water filtration ; Molecular dynamics simulations ; Oscillation frequency ; Salt rejections ; Thermal desalination ; Water permeation ; Water permeation rate ; Water purification technologies ; Oscillating flow ; Desalination ; Electric field ; Membrane ; Purification ; Reverse osmosis ; Water flow
  8. Source: Desalination ; Volume 495 , December , 2020
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0011916420313503