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Australians invented a passive, self-cleaning seawater desalination plant


A huge number of people in the world, according to informationinternational organizations, up to 2 billion people are deprived of access to clean drinking water. Meanwhile, we are surrounded by oceans filled with salty water that is not suitable for human consumption. The solution to the problem of desalination of sea, salt water can be an invention of Australian scientists who have created a device using organometallic frameworks (MOF) and sunlight to obtain fresh water in just 30 minutes.

Research team from the Australian UniversityMonasha created a special MOF called PSP-MIL-53 by integrating MIL-53 (a material for the adsorption of water and carbon dioxide molecules) and spiropyranacrylate (PSP). One of the features of MOF's spongy structure is its enormous internal surface area. For example, if you take a PSP-MIL-53 with a volume of one teaspoon, then its inner surface area will be comparable in size to a football field.

The principle of operation of the desalination system PSP-MIL-53consists in the absorption of salt ions from seawater upon contact of the liquid with the surface of the "nano-sponge". In testing with 30 minutes water contact with MOF, purification was carried out from an initial level of dissolved solids (TDS) of 2233 ppm (foreign matter per million) to 500. The WHO drinking water rating is 600 ppm.

After just four minutes underby sunbeams MOF was ready to be reused. According to scientists, 1 kg of MOF PSP-MIL-53 is capable of desalinating 139.5 liters in one daylight. At the same time, renewable solar energy will be required to clean the installation, the surplus of which is observed precisely in the area where there is the most serious problem with the shortage of fresh water.

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