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#1
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Why do some plants concetrate unstable isotopes?
Bananas and Brazil nuts concentrate radioactive Potassium (and
Polomium in the case of Brazil nuts). Why? |
#2
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In article , Michael
Green writes Bananas and Brazil nuts concentrate radioactive Potassium (and Polomium in the case of Brazil nuts). Why? According to sites on the web its Radium that Brazil Nuts concentrate. That would make sense - Brazil Nuts are known for concentrating Strontium and Barium, and Radium is chemically similar to those elements. Brazil Nuts are high in Selenium. I don't recall anything about the chemistry of Polonium, but from its position in the periodic table I'd expect similarities to that of Selenium. Bananas concentrate Potassium. From the point of view of a Banana's metabolism the differences between radioactive and other isotopes of Potassium is negligible. So it seems likely that the concentration of Radium and Polonium by Brazil Nuts is a side effect of the concentration of Barium, Strontium and Selenium, and the concentration of radioactive Potassium by bananas is a side effect of the concentration of Potassium in general. -- Stewart Robert Hinsley |
#3
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That's nothing. Once I read in a book that some seaweeds concentrate GOLD
from seawater; there're something like floating ion-exchange systems. I can't remember the name though. "Michael Green" wrote in message om... Bananas and Brazil nuts concentrate radioactive Potassium (and Polomium in the case of Brazil nuts). Why? |
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