Loading...

Investigation of the Graphene Oxide Membrane Performance in Industrial Wastewater Treatment Via Molecular Dynamics

Alizadeh Binazir, Iman | 2024

0 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 57025 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Firoozabadi, Bahar
  7. Abstract:
  8. Purification of water and industrial wastewater, especially wastewater containing toxic metals, is one of the challenges that developing societies face. Currently, nano membranes, including two-dimensional graphene-oxide nanomaterials, have become very important to replace polymer membranes. However, the performance of this type of membrane for heavy metals has received less attention from researchers. In this thesis, using molecular dynamics simulation, the performance of graphene oxide membrane in terms of water flux and removal of heavy ions of mercury and arsenic, with a concentration of 0.5 M, has been investigated by reverse osmosis method. By increasing the distance between the layers, it was found that the water flux increased due to more space for molecules to pass, but on the other hand, ion rejection decreased. Also, the mechanism of water molecules passing through the graphene oxide membrane using the image of the structure of water molecules between the layers, water density diagrams in the nanochannel and calculating the number of hydrogen bonds for different interlayer distances were investigated. The mechanism of water molecules passing through the graphene oxide membrane by using the image of the structure of water molecules between the layers, water density diagrams in the nanochannel were also investigated by calculating the number of Hydrogen bonds for different interlayer distances. With the increase of fluid temperature from 300 to 340 degrees Kelvin, it was observed that water flux increased and ion rejection decreased. Also, by increasing the concentration of mercury and arsenic ions from 0.5 to 1 M on the feed water side, it was found that the increase in concentration decreased the water flux, but it had little effect on ion rejection. In addition, one of the most important parameters affecting the amount of water passing through the membrane is the geometrical design of the membrane, which we also examined in this research, and the two conventional cross-flow and dead-end geometries were compared with each other and it has been determined that the cross-flow geometry shows a better performance than the dead-end geometry, both in terms of the flow of water and in terms of the removal of mercury and arsenic ions
  9. Keywords:
  10. Graphene Oxide ; Industrial Wastewaters ; Wastewater Treatment Plant ; Molecular Dynamics ; Heavy Ion ; Reverse Osmosis ; Water Treatment

 Digital Object List

 Bookmark

No TOC