Swarms of Tiny Robots Remove Microplastics From Soil and Water (phys.org)
- Reference: 0184934596
- News link: https://hardware.slashdot.org/story/26/08/12/0547231/swarms-of-tiny-robots-remove-microplastics-from-soil-and-water
- Source link: https://phys.org/news/2026-08-swarms-tiny-robots-microplastics-soil.html
> Scientists from the Czech Republic have created microscopic cleanup robots that [2]successfully removed microplastics from both soil and aquatic environments in the lab . Details of their work are [3]published in the journal npg Asia Materials . To build the robots, researchers started with microscopic MXene particles made of ultrathin, stacked layers. The material has a large surface area and surface chemistry that help it attract and hold plastic. They then coated the particles with magnetic nickel nanoparticles so rotating magnetic fields could drive the tiny robots.
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> Then came the testing phase. The team placed swarms of these microbots into water and soil samples contaminated with plastic. The externally generated magnetic fields made the robots spin and tumble through the liquid and squeeze through tiny water-filled gaps in the soil. "In soil environments, the microrobots can navigate through water-permeated soil microenvironments, actively disrupt microplastic entrapment within soil matrices, and extract them," the study authors commented in their paper. As they moved, their sticky surfaces collided with microplastics, binding to them and dragging them along. The researchers then used a magnet to pull the microrobots, along with their trapped plastic cargo, out of the samples.
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> They performed well. In water, they removed about 94% of test polystyrene particles and 89% of PET (polyethylene terephthalate) in around an hour. In the model soil, they removed about 81% of the polystyrene and 72% of PET. This outperformed the same MXene material used without magnetic motion, which relied on passive adsorption rather than actively moving through soil and water.
[1] https://slashdot.org/~alternative_right
[2] https://phys.org/news/2026-08-swarms-tiny-robots-microplastics-soil.html
[3] https://www.nature.com/articles/s41427-026-00670-7
Ingested? (Score:2)
So what do these things do if ingested by animals, like humans?
Re: (Score:2)
Make you invincible to micro-plastics. Meet Nano-Man, able to swallow an entire McDonald's Big Mac and NOT die.
Re: (Score:3)
Exactly. What percentage of the robots did they recover? What happens to the ones left behind? Are they extracting anything else from the soil?
Re: (Score:2)
They cause [1]Koro. [wikipedia.org] A truly deadly disease if you can convince large parts of the population that some sort of witchcraft is the cause and they attack and kill the accused group.
[1] https://en.wikipedia.org/wiki/Koro_(disease)
Re: (Score:2)
Difficult to tell given we can't find a person without detectable levels.
Removing it will never be (Score:2)
Better or cheaper than not putting it there in the first place. When you see stuff like this it's greenwashing. Like how recycling does basically fuck all but we all get told as kids to do it because the plastic industry pays to have you told that bullshit.
Re: (Score:3)
Crap to call this greenwashing.
The problem of microplastics already exists around the world, including in the snow on Antarctica and mother's milk.
When this would lead to an affordable way to catch and remove the existing microplastics this would be great news.
Re: (Score:2)
It's also robotwashing. These fundamentally aren't robots, both because they're remotely motivated and because they make no decisions on their own.
Re: (Score:2)
You must be an engineer to have figured that out!
Re: Removing it will never be (Score:2)
It doesn't take an engineer to figure out it's bullshit which isn't necessary to drum up interest on a site for nerds
Re: (Score:3)
No, but since bells can't be unrung and we don't have time machines, cleaning up what's already there seems a bit more reasonable than you're making it out to be.
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Recycling is effective when done right. While we do need to stop putting more microplastics into the environment, being able to remove them will be very useful because there are already vast quantities there. The key will be doing it cheaply.
Re: (Score:2)
You don't have to complain about everything. Removing plastic from the water is a good thing.
A Clockwork Origin (Score:2)
I remember that episode of Futurama. It didn't end great for the humans.
What else are the pulling in from the environment (Score:2)
This may be a case of the best of bad choices. I have to imagine plastics are not the only thing they are removing from the water and soil. But the with how contaminated everything seems to be, maybe it is still worth it. Though other than being alarmed, if plastics are as bad as the for us as we imagine wouldn't more people be suffering from the contamination?
I guess, as with everything, the devil is in the details.
Not robots? (Score:2)
If you have a machine that moves balls around according to some scheme, the machine itself might be a robot, but the balls that it moves are not robots. The "robots" in this article are not capable of independent motion, they are moved by an external magnetic field, and their only interaction with their environment is through passive chemical reactions. They are particles. They are as much robots as iron filings are, IMHO. The "robot" / "microrobot" term seems like just clickbait.
Re: (Score:2)
I looked it up briefly, and it seems their use case does conform to definitions of "microbot" and "microrobot" as used elsewhere. External power and guidance of small constructed are apparently expected at this scale.
Definitely Interesting (Score:2)
How much power is needed to drive them? They remove a high percentage of the target material, does this scale and how much none target material comes along with the target material?
What happens when fish eat these robots? (Score:2)
What happens when fish and other wildlife eat these? Eventually, that food chain goes to humans.
In a related news... (Score:3)
...swarms of robots remove pieces of tiny robots that collided each other, and microplastics.
Re:In related news... (Score:3)
...swarms of robots remove pieces of swarms of robots that were removing pieces of tiny robots that collided with each other, that collided with each other, and microplastics.