Nano implies small — and that’s great for use in medical devices, beauty products and smartphones — but it’s also a problem. All these tiny particles get into our water and are difficult to remove. Now, researchers Yoke Khin Yap and Dongyang Zhang have a novel and very simple way to take the nanomaterials out.
CREDIT
Michigan Tech, Sarah Bird
New method to purify contaminated water
Purifying water and greening nanotechnology could be as simple as shaking a vial of water and oil. At least that’s the case for a new method to clean contaminated water full of unwanted nanomaterials.
Nano implies small–and that’s great for use in medical devices, beauty products and smartphones–but it’s also a problem. The tiny nanoparticles, nanowires, nanotubes and other nanomaterials that make up our technology eventually find their way into water. The Environmental Protection Agency says more 1,300 commercial products use some kind of nanomaterial. And we just don’t know the full impact on health and the environment.
“These materials are very, very tiny and that means if you try to remove them and clean them out of contaminated water, that it’s quite difficult,” says Dongyan Zhang, a research scientist at Michigan Technological University. She adds that techniques like filter paper or meshes often don’t work.
Instead, shaking up oil and water traps the nanomaterials, which can be easily removed. The process clears out nearly 100 percent of nanowires, nanosheets, nanotubes and other one- and two-dimensional nanomaterials. Only zero-dimensional nanospheres are still too small to grab.
Read more: Shaking the nanomaterials out
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