Solar-Powered Moisture Harvester Collects and Cleans Water from Air


Access to clean water remains one of the biggest challenges facing humankind. 

Access to clean water remains one of the biggest challenges facing humankind. A breakthrough by engineers at The University of Texas at Austin may offer a new solution through solar-powered technology that absorbs moisture from the air and returns it as clean, usable water.

The breakthrough, described in a recent issue of the journal Advanced Materials, could be used in disaster situations, water crises or poverty-stricken areas and developing countries. The technology relies on hydrogels, gel-polymer hybrid materials designed to be “super sponges” that can retain large amounts of water.

A research team led by Guihua Yu in UT Austin’s Cockrell School of Engineering combined hydrogels that are both highly water absorbent and can release water upon heating. This unique combination has been successfully proved to work in humid and dry weather conditions and is crucial to enabling the production of clean, safe drinking water from the air.

With an estimated 50,000 cubic kilometers of water contained in the atmosphere, this new system could tap into those reserves and potentially lead to small, inexpensive and portable filtration systems.

Read more at University of Texas at Austin

Image: Fei Zhao (L), co author of the study, and Guihua Yu (R) of Yu Research Labs at UT Austin examining a sample of their newly-developed hydrogel. (Credit: Cockrell School of Engineering, The University of Texas at Austin)