Scientists In Zurich Develop Titanium Mesh That Cleans Toxic Fog

Fog harvesting is a neat trick to collect water, and with just a bit of meshing, one can gather several hundred liters of water daily. But there’s a hiccup in the urban landscape – the water from fog can be tainted by atmospheric pollution, making it unfit for use.

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Enter a game-changing solution that not only harvests fog but also ensures the water you get is clean and drinkable. Plus, guess what? This innovation could also play a role in cleaning up emissions from power plants!

On August 16, as mentioned in Nature Sustainability, scientists unveiled a brilliant design: a tightly woven metal lattice, draped with a special mix of polymers and titanium dioxide. Here’s the magic – while the polymer part helps collect water efficiently, the titanium dioxide acts as a knight in shining armor, breaking down those nasty pollutant molecules.

When the team tested their invention in a Zurich lab, the results were promising. The mesh caught 8% of the moisture in the surrounding air and impressively neutralized about 94% of added pollutants, including diesel particles and BPA (you might know this one – it’s often found in plastics).

Ritwick Ghosh from the Max Planck Institute for Polymer Research, involved in the project, shared the good news: “Our system not only harvests fog but also purifies the collected water. Perfect for urban centers with Pollution!”

And here’s the cherry on top – this cool technology doesn’t need much upkeep or any artificial power. Thanks to a process called photocatalytic memory, a bit of UV light is all it takes to get the titanium oxide going. A mere 30-minute sunbath keeps it active for a whole day, which is pretty handy given that foggy areas don’t see much of the sun.

But wait, there’s more! This isn’t just for your backyard or rooftop. The research team, led by Thomas Schutzius, sees potential for using this in power plants’ cooling towers. Schutzius mentioned how in places like the U.S., vast amounts of fresh water are used for cooling. So, why not capture, purify, and reuse it? Their tests have already shown promising results in both small and large-scale settings, hinting at a brighter, cleaner future for all.

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