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The mysterious black fungus from Chernobyl that may eat radiation

bbc.com

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Re: The mysterious black fungus from Chernobyl that may eat radiation

#21
post #2

I wonder if you could power something of this? If the fungus have some type of melanin that will turn ionized radiation into energy, could we then use that to power something of background radiation? Also interesting to see how close this fungi will grow to the radiation source, or will it be able to mutate to completely envelop the radiation source.

I had the same thought, I wonder if we could make better solar cells?

Re: The mysterious black fungus from Chernobyl that may eat radiation

#23

I did some basic calculations to compare the energy in the radiation vs the energy required to grow 10% extra. - If we assume they are working in the reactor we get radiation levels of something like 1 mGy/hour. But we can prop this up to mabye 500 mGy/hour since i dont know how they grew their culture - That leads to 0.05 J of extra energy per gram of microbial bio material. - Energy needed to grow 1g of microbial b…

Add in some evolutionary strategies, and you have the recipe for a good sci-fi book: a fungus in Chernobyl rapidly outpaces its competitors due to its ability to absorb radiation. Each iteration grows and reproduces faster, until it is so blindingingly fast that it begins to outpace the output the fuel rods produce. The world rejoices as this fungus is perfect for cleaning up nuclear waste products, until we realize…

This lines up with a book idea I've had for like 20 years. Crazy!

Don't wait to write sci-fi I suppose! Life may catch up, haha.

Re: The mysterious black fungus from Chernobyl that may eat radiation

#24

This would be a cool origin story for astrophage (from Project Hail Mary, a fun & light sci fi read by the Martian guy)

There is a movie coming with Ryan Gosling, I sure hope they keep the spirit of the book and don't turn that into some bizarre hollywoodish cash grab

Re: The mysterious black fungus from Chernobyl that may eat radiation

#25

I did some basic calculations to compare the energy in the radiation vs the energy required to grow 10% extra. - If we assume they are working in the reactor we get radiation levels of something like 1 mGy/hour. But we can prop this up to mabye 500 mGy/hour since i dont know how they grew their culture - That leads to 0.05 J of extra energy per gram of microbial bio material. - Energy needed to grow 1g of microbial b…

Add in some evolutionary strategies, and you have the recipe for a good sci-fi book: a fungus in Chernobyl rapidly outpaces its competitors due to its ability to absorb radiation. Each iteration grows and reproduces faster, until it is so blindingingly fast that it begins to outpace the output the fuel rods produce. The world rejoices as this fungus is perfect for cleaning up nuclear waste products, until we realize…

Aside from the Chernobyl part, that's basically Andromeda strain

Re: The mysterious black fungus from Chernobyl that may eat radiation

#26
I was immediately reminded of Hayao Miyazaki's post-apocalyptic manga and anime film, "Nausicaa of the valley of the winds", where the fungus-and-spore-filled jungle, toxic and lethal to humans, actually serves as a sequestering and purification agent for the ecosystems affected by some apocalyptic, possibly nuclear, catastrophe.

http://www.nausicaa.net/wiki/Nausica%C3%A4_of_the_Valley_of_...

https://ghibli.fandom.com/wiki/Nausicaä_of_the_Valley_of_the...

Re: The mysterious black fungus from Chernobyl that may eat radiation

#27

I did some basic calculations to compare the energy in the radiation vs the energy required to grow 10% extra. - If we assume they are working in the reactor we get radiation levels of something like 1 mGy/hour. But we can prop this up to mabye 500 mGy/hour since i dont know how they grew their culture - That leads to 0.05 J of extra energy per gram of microbial bio material. - Energy needed to grow 1g of microbial b…

Add in some evolutionary strategies, and you have the recipe for a good sci-fi book: a fungus in Chernobyl rapidly outpaces its competitors due to its ability to absorb radiation. Each iteration grows and reproduces faster, until it is so blindingingly fast that it begins to outpace the output the fuel rods produce. The world rejoices as this fungus is perfect for cleaning up nuclear waste products, until we realize…

A variation on the Gray Goo scenario.

https://en.wikipedia.org/wiki/Gray_goo

Re: The mysterious black fungus from Chernobyl that may eat radiation

#28

I feel like I'm taking crazy pills every time I read about this fungus. Let us grant the premise of a fungus somehow harnessing ionizing radiation using melanin; such a fungus could in principle be used to shield radioactive sources, but it won't "eat it up"; the radioactive isotopes emitting that radiation won't be disposed of in any way by the fungus. They don't eat those, and even if they did it wouldn't get rid o…

>the radioactive isotopes emitting that radiation won't be disposed of in any way by the fungus. They don't eat those, and even if they did it wouldn't get rid of them

Please excuse the novice question but I am confused, where does the energy come from then?

Re: The mysterious black fungus from Chernobyl that may eat radiation

#29

I did some basic calculations to compare the energy in the radiation vs the energy required to grow 10% extra. - If we assume they are working in the reactor we get radiation levels of something like 1 mGy/hour. But we can prop this up to mabye 500 mGy/hour since i dont know how they grew their culture - That leads to 0.05 J of extra energy per gram of microbial bio material. - Energy needed to grow 1g of microbial b…

I also did some back of the envelope calculations. Here's what I got: the radiation level just 1 meter away from the "elephant foot" (the solidified molten core), at the time of the accident was about 1000 times lower than the solar irradiation. At 100 meters it was 10 million times lower (because of the inverse square law). Now, the radiation from the elephant foot has decreased significantly. I couldn't find a recent estimate, but I would expect it to be at least 100 times lower. So at 100 meters from the elephant foot, the radiation level is a billion times lower than what you get from the sun. There's no way any organism can "feed" on that.

Re: The mysterious black fungus from Chernobyl that may eat radiation

#30

I feel like I'm taking crazy pills every time I read about this fungus. Let us grant the premise of a fungus somehow harnessing ionizing radiation using melanin; such a fungus could in principle be used to shield radioactive sources, but it won't "eat it up"; the radioactive isotopes emitting that radiation won't be disposed of in any way by the fungus. They don't eat those, and even if they did it wouldn't get rid o…

In regards of NASA taking it seriously, my null hypothesis would be that reporters misunderstand NASA just as much as everything else about fungi.

If I understand the linked NASA press releases correctly, they are talking about using a mix of regolith, cyanobacteria and fungi as part of the outer shell of a habitat. The mycelian network of the fungi binds the loose regolith together, forming a strong and somewhat flexible material, with the fungus working a bit like the cement in a concrete mix. And because fungi don't form from nothing you add cyanobacteria that create "fungus food" (presumably some sugar) from water and CO2 (I'm sure you need to add a bit more than that, but that might be beyond the scope of a press release)

This really has nothing to do with radiation-absorbing fungi at all, except for one remark how the melanin in radiation-eating fungi could provide further shielding.

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