Nanotech Lilypads
Published on by Water Network Research, Official research team of The Water Network in Technology
Powerful Solar Powered Devices that Can Slowly Clean Whole Ponds and Reduce River Pollution by Puralytics
The LilyPads, which are plastic, contain a mesh with a nano-tech coating. When sunlight hits the surface, it spurs a reaction that breaks down material in the water nearby. The process is sufficient to eliminate E. coli and salmonella, and also helps trap heavy metals, Owen says.
Owen, who lives in Oregon, started working on the mesh seven years ago. While in Japan, he saw a "smog-eating" building (probably covered with titanium dioxide) and wondered if he could adapt the idea for water treatment. His material is related to the photo-reactive coatings seen on a growing number of high-rise buildings.
His company,Puralytics, first developed the SolarBag, which includes the same mesh. Treating up to three liters of water at a time, it's since been sold in 60 countries. The LilyPad is still being trialled and doesn't yet have a release date or price.
One possible application is to clean up ponds that aren't worth dredging and refilling. The LilyPads could offer a speedier alternative to letting polluted water revive itself naturally. You can just leave the devices sitting on the surface for months at a time until they've done their thing.
Another potential application is in stormwater clean-up. Often, heavy rains in cities deliver a lot ofunwanted chemicalsand metals into streams and rivers.Puralyticsis looking at ways to purify contaminated water before it enters, working with a $53,000 grant fromOregon BEST, a nonprofit that funds early-stage cleantech in the state.
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