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Rippled Graphene Is Better For Water Desalination

Iranian scientists have revealed Multi-Layer Rippled Graphene increases “Water Flux”  by 20%. A significant improvement over Non Rippled Graphene.

Water Desalination involves the use of reverse osmosis to remove salt from ocean water. It is one of the few rainfall independent fresh water sources. The UN expects 14% of the population to experience fresh water scarcity by 2025.

“Water flux” means the rate at which water can travel through the semi permeable membrane used to siphon out salt. The faster the water flux the sooner you get fresh-water and the cheaper it is to purify.

In order to prevent geopolitical tension arising from water scarcity in the future it’s important that we continue to improve desalination technology so that it does not remain cheaper to simply drain all of our freshwater lakes as the population expands. Affordable desalination could unlock our oceans  as an abundant source of drinkable water.

In an article published by the Journal of Molecular Liquids

Scientists from the University of Tehran used three layers of Graphene in the new membrane – all of which are split in two smaller pieces so that pistons (yellow) on the outside can push saltwater through these holes (B-A). Most stripping of salt ions (Cl-, Na) from water occurs in those two larger channels however (H)

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“The mixture of salty water consist of 2883 water molecules and 10 pairs of sodium and chloride ions which are located on the right side of the membrane. Water molecules are shown as transparent, sodium ion and chloride ion are represented by green balloons and red balloons respectively.

04/29/18 Multilayer graphene with a rippled structure for water desalination

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