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karthikaqpt writes:

A simple device that can capture its own weight in water from fresh air and then release that water when warmed by sunlight could provide a secure new source of drinking water in remote arid regions, new research from KAUST suggests.

At the heart of the device is the cheap, stable, nontoxic salt, calcium chloride. This deliquescent salt has such a high affinity for water that it will absorb so much vapor from the surrounding air that eventually a pool of liquid forms.

https://www.rtoz.org/2018/12/07/drinking-water-sucked-from-the-dusty-desert-air-using-hybrid-hydrogel/ [rtoz.org]

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