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AW: Prussian Blue as Tmt for Exposure to Radioactive Exposures
The ICP report compiled by the United
Nations and the IAEA for the Chernobyl Project contains information of
interest regarding the effectiveness of Prussian Blue. Their data implied
however, that the country of origin was a very significant factor in the
effectiveness of the dye in on Cesium elimination. The three countries whose
product was tested were Germany, the USA and Great Briain with the German
make having the greateest apparent effectiveness and the British the least.
No explanation was offered for this and I have heard little of this finding
in the current discussions. Was it ever discounted?
[----------------------------------------------------------
I do not know the "ICP report", but reading your summary it
must be a very faulty, incomplete and wrong report - or (what I would rather
be inclined to believe) your interpretation is totally wrong. The country of
origin cannot be decisive for effectiveness. Any differences must be due to
the chemical composition and there it is really of no importance, where the
chemical comes from!!!!
Hexacyanoferrates have been known since decades to adsorb Caesium and
they have been used for analytical purposes. Prof. Giese from Germany has
long before the Chernobyl accident investigated the use of different
hexacyanoferrates and he found one compound, which to my memory is an
ammonium-hexacyanoferrat to be most effective and this compound has actually
been "baptized" as "Giese-Salt", under which name it is
well known in Europe. Hexacyanoferrates have been used extensively in Norway
and in Cumbria (Great Britain) to reduce the Cs-137 concentration in sheep.
I do not know, where in the USA hexacyanoferrates would have been used
because of no contamionation from Chernobyl - or please enlighten me, where
US made hexacyanoferrates have been tested. Hexacyanoferrates have been
tested and actually used to decrease Cs-contamination of milk in Austria in
order to be able to export dried milk and we even had a small research
program on wild animals like roe deer. We decided that the decrease of
Cs-137 in roe deer was not worth the effort, because the reduction in Cs-137
and especially the reduction of the dose when eating the Austrian average of
about 200 g of roe deer meat per year was really negligible.
I have not followed this thread, but would now ask, where I can find
that ICP report on the net, because I simply cannot believe that
international organizations would distribute such nonsense, that the country
of origin would be responsible of the effect of a
chemical!
[Christian Schönhofer] Franz