Originally posted by dizTheWiz
www.geopolymer.org...
think i may have found something...sorry if link was already postededit on 22-4-2011 by dizTheWiz because: (no reason given)
check it out may be what every one is loooking foredit on 22-4-2011 by dizTheWiz because: (no reason given)
I have just got around to reading the above document that was posted by dizTheWiz and it is clear from the start that we are not just talking about
limestone, which we know can be dissolved by acid. I am posting a short paragraph from the start of the document to show what it is about and to make
clearer the findings of the research done by Joseph Davidovits and Fransisco Al Iaga.
The organo-mineral complexes are obtained through the intermediary of oxalates, tartrates, succinates, fulvates, etc. .(3) It is known also that
the organo-mineral complexes have a very strong dissolving action on the natural silico-aluminates (feldspar, hornblende, laterite,
clorite,...) their dissoving action being 2 3 times greater than that of sulphuric acid or hydrochloric acid (4). The most highly acctive
organo-mineral complexes are those obtained with oxalic acid, which is found in large quantities in numerous plants (5).
Quote is from the above link, emphasis is mine.
So we are definitely talking about minerals other than limestone, and the article does appear to confirm that the main active ingredient is oxalic
acid. Lots of plants produce oxalic acid, including the large number of species in the Dock family. I'm not a scientist, so some of the language in
the piece is quite difficult for me and it is only an abstract - not the whole paper that was presented, but hopefully I'll be able to post up a few
more points when I've done.
Ok, a few more points from the above article.
The experimental findings that are presented are, despite the initial statement, from working with calcium carbonate. They tested the actions of
acetic acid, oxalic acid and citric acid. They found that higher concentrations of acid did not assist the process because of reduced dissociation of
the acid, I am not sure exactly what that last bit means so I'm taking their word for it. They found, from what I can gather, that a maximum rate of
dissolution was obtained by a mixture of oxalic acid with vingar (acetic acid), but, they also found that alone or with the vinegar, oxalic acid
tended to produce a precipitate of calcium oxalate which was very hard and insoluble and hindered the process. This precipitate, however, was found
to be rendered soluble with the addition of citric acid to the mixture, which also added its own dissolving action to the process overall.
There is also a table showing the identification of carboxylic acids in various plants, and an illustration of a bas-relief from Egypt showing the use
of a liquid to hollow out an alabaster vase that are quite interesting if anyone wants to take a look.
peace
J

edit on 24-4-2011 by skjalddis because: added further stuff