Greetings, micro community. I wonder if someone can give me a
tip on the synthesis of amorphous ferric oxyhydroxide, for the
purpose of serving as an electron acceptor for dissimilatory
iron reduction. I have whipped up a batch of brown, mucky
iron compound by bringing a solution of 400 mM ferric chloride
up to pH 7 by adding NaOH. Then I rinsed and centrifuged several
times, and finally filtered to get rid of most of the water. Then
I let the filtered compound sit in an evacuated dessicator jar
overnight.
The stuff is clearly still holding a fair amount of water. I know
that heating it will result in crystallization, which would defeat
the purpose of the synthesis. Does anyone know of a reliable way
to dry this stuff, without causing it to assume a crystalline
structure? Most FRBs won't breath it if its crystalline.
Thanks.
Nick Landau
Dept. Biochemistry and Microbiology
Rutgers University
New Brunswick, NJ USA
