Graphene Oxide to be Used for Converting Salt Water into Fresh One

23.11.2016

Chinese scientists have developed a device for sea water desalination due to the energy of the sun. The use of graphene oxide would provide effective energy absorption and will allow avoid heat loss during evaporation.

Graphene Oxide to be Used for Converting Salt Water into Fresh One

The device is a tablet of the insulator (polystyrene) wrapped in cellulose, a plate of graphene oxide is placed on top, which absorbs the sun rays. Water penetrates into the cellulose layer due to capillary forces and comes to the heat absorber plate.

Efficiency of the still is kept at 80 percent, even if the volume of sea water increases. Heating is mainly localized in the graphene oxide plate. As a result, the salinity of desalinated water is even below the standard adopted for drinking water (200 milligrams per liter).

In other such devices, the heat sinks were in contact with a large volume of water, which energy was spent inefficiently.

A new type of desalination plants can be widely used in countries facing the shortage of drinking water.