Hydrophilic Disc Removes Salt from Seawater

Hydrophilic Disc Removes Salt from Seawater
A hydrophilic disc that attracts water while also resisting salt contamination could find its way into commercial desalination systems.

One of the disadvantages with current solar-powered desalination systems is that the extracted salt tends to accumulate on the material, hampering its performance. To overcome this obstacle, the team from Monash University created a solar steam generator made up of a disc of super-hydrophilic filter paper coated with light-absorbing carbon nanotubes. A cotton thread attached to the bottom draws water up into the disc, which traps the water while forcing the salt to the edges.

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