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Reply #29: Manieri's critique on the elemental aluminum topic looks pretty weak. [View All]

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eomer Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Sep-19-10 04:32 PM
Response to Reply #28
29. Manieri's critique on the elemental aluminum topic looks pretty weak.
He's a forensic ballistics expert, not a chemist, and it looks like he has based his conclusion on a product warning label that he found by googling, basically.

And the statement he found does not really support his conclusion, does it? Does MEK really separate aluminum out of alumino-silicate? Manieri takes a generic statement about potential reactivity between MEK and aluminum (under unspecified conditions) and stops there without considering whether MEK will actually separate out aluminum when it is chemically bound in a specific compound and under the specific conditions of the test. He found the answer he liked, essentially, so that was the point at which he chose to stop.

In response Prof. Jones says that, no, MEK will not separate aluminum from alumino-silicate:

More responses... Tuesday morning 7 April 2009


2. In the section of MEK results in the paper, we state:
" Focusing the electron beam on a region rich in silicon,
located in Fig. (15e), we find silicon and oxygen and very
little else (Fig. 16). Evidently the solvent has disrupted the
matrix holding the various particles, allowing some migra-
tion and separation of the components. This is a significant
result for it means that the aluminum and silicon are not
bound chemically."

In kaolin and other substances which incorporate Al and Si, the Al and Si are bound chemically -- that is, they will NOT separate under the action of a solvent such as MEK. That is why these MEK tests are so significant! WE thought of the possibility of an alumino-silicate early on of course, but then we did the MEK tests and were observed a separation of Al from other elements with this solvent - and this test RULES OUT strictly the notion that the aluminum which migrated is bound in an aluminosilicate.

I've looked and couldn't find (so far) any paper that answers the question specifically. Do you have any?

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