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Window-sized device taps the air for safe drinking water | MIT engineers developed an atmospheric water harvester that produces fresh water anywhere — even Death Valley, California.
MIT engineers developed an atmospheric water harvester that captures water vapor and produces safe drinking water across a range of relative humidities, including dry desert air.
The new device is a black, window-sized vertical panel, made from a water-absorbent hydrogel material, enclosed in a glass chamber coated with a cooling layer. The team estimates that multiple vertical panels, set up in a small array, could passively supply a household with drinking water, even in arid desert environments. Within the hydrogel itself, they included an extra ingredient: glycerol, a liquid compound that naturally stabilizes salt, keeping it within the gel rather than letting it crystallize and leak out with the water.
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