Bacteria Used To Make Radioactive Metals Inert 237
Serenissima writes "Researcher Judy Wall is experimenting with bacteria that can cleanse the radioactivity from toxic areas by rendering the heavy metals into non-toxic, inert versions. The technology is not without its flaws (the bacteria can't exist in an oxygenated environment yet), but it does have the potential to cleanse some of the world's hazardous sites. From the article: 'The bacteria Wall is studying are bio-corrosives and can change the solubility of heavy metals. They can take uranium and convert it to uraninite, a nearly insoluble substance.'"
For those who don't RTFA... (Score:5, Informative)
Of course they are not actually changing radioactive materials to non-radioactive materials - they change the compounds containing uranium to compunds that are very weakly soluble in water (instead of highly soluble), so they don't migrate easily. Very useful, but a little different from the impression I got from the summary.
Brett
Re:Non-Toxic inert? (Score:5, Informative)
If a bacterial process can economically neutralize the material and induce it to stay where it is, rather than dissolving and floating around, that would make the problem smaller.
Re:Non-Toxic inert? (Score:5, Informative)
In other words, that really nasty stuff likes to dissolve in water and spread everywhere, especially into the water table.
They want to make it not do that, so it's in a contained area, and might even be possible to extract it, or at least stopping it from making everything within a huge area into Chernobyl Nitelights.
I actually worked at a place that had to monitor this kind of stuff.
Previous owners had 'disposed' of contaminated materials by buying them.
Ironically, it wasn't the buried stuff that was the greatest risk factor to us.
I'm sure most of you, including icebike, probably understand this, but it seemed the perfect chunk of thread to post this.
Re:Change the solubility of heavy metals (Score:5, Informative)
Other way around... they want to make the metals insoluble so they won't contaminate water sources.
Re:Chemically inert, they mean (Score:5, Informative)
Yup, doesn't change radioactivity at all. Despite heavy metal toxicity being a far bigger problem in terms of actual, real-world pollution, it just doesn't have the attention-grabbing aspects that radiation does.
Re:Bad summary (Score:4, Informative)
Re:Misleading (Score:3, Informative)
The problem is the submitter and editor thought folks at slashdot would know what "inert" [wikipedia.org] means. Obviously, you and a few others didn't.
"Inert" has absolutely nothing whatever to do with radioactivity, even though radioactive materials may or may not be inert.
Re:Change the solubility of heavy metals (Score:2, Informative)
Re:Evil scientist picture (Score:1, Informative)
Re:Chemically inert, they mean (Score:5, Informative)
Researchers should either write their own press releases or else not bother talking to the press at all.
I don't think you understand how this works at all. The researchers do research. The University has people on staff that are paid to publicize research. They try to understand the research as best they can. Then, they publicize it, trying to get the research all over the place, and THEY contact the press. If you are lucky (or unlucky, actually - it is a waste of time) the press may talk to you. The researchers are often several steps away from the reporters that report on it. I say this as a researcher who had research that I did at the University of Missouri (the university in question here) publicized, so I know how this works.
The process is pretty much completely beyond your control as a researcher. If the University wants to publicize your research, and they're going to do it regardless of what you say. You can't just not talk to your own university about your research.
Re:radioactive bacteria (Score:4, Informative)
Sorry, no, those examples aren't what I asked for.
To begin with, animals that reproduce sexually get an overwhelming majority of their genetic diversity from recombining genes from both parents. Random mutation, while present, is a minor factor in their evolution (how minor is a source of continued debate). All of your examples fall into this category.
Further, while they did likely mutate due to radiation at some point (you're quite right that the rate of radiation induced mutation is not zero), they don't meet the criteria of "harmless before, was mutated, now dangerous". Specifically, all of the examples you gave were apex predators, descended from a long line of large predatory animals, all of them likely dangerous.
In the case of the T-Rex, it's entirely possibly the species' ancestors were more dangerous, since Tyrannosaurs are generally thought to have been more opportunists than hunters - evolution made them less deadly, even as they got larger.
Anyway, I get your point that every extant species has at least some traits imparted by radiation induced mutation, and wasn't arguing otherwise. I merely wished to show that radiation isn't a relevant force in making otherwise harmless bacteria into pathogens, despite what Hollywood science has to say.