Freshwater from thin air

Read the full story from Wiley.

Hydrogels have an astonishing ability to swell and take on water. In daily life, they are used in dressings, nappies, and more to lock moisture away. A team of researchers has now found another use: quickly extracting large amounts of freshwater from air using a specially developed hydrogel containing a hygroscopic salt. The study shows that the salt enhances the moisture uptake of the gel, making it suitable for water harvesting in dry regions.

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