Earl Wagner posted Sat, 25 May 2013 10:38:50 +0000 (UTC)
>
> Poutnik wrote:
> > Klaus G�nter posted Fri, 24 May 2013 16:04:27 +0000 (UTC)
The point is, the uranium collection from sea water
is based on its physical and chemical properties as chemical element.
Uranium physion products are different elements
with very different properties,
having in common with uranium just radioactivity.
And quality and lasting of this radioactivity
differs very much as well.
Unanium-235 has hald half time 700 millions years.
http://en.wikipedia.org/wiki/Uranium-235
E.g. One of the most scared is 131-Iodine with short half-life (8 days),
http://en.wikipedia.org/wiki/131I
that is volatile and created contamination of atmosphere
during Cernobyl accident.
Another scared Stroncium-90 and Caesium-137,
http://en.wikipedia.org/wiki/Caesium-137
http://en.wikipedia.org/wiki/Strontium-90
with longer half life ( about 30 year for caesium, 29 for stroncium )
that are reactive metals and create soluble salts,
contaminating soil and water.
90Sr was well known in the accident of exposure of japanese fisherman
during some early nuclear weapon tests.
--
Poutnik