Saturday, September 11, 2010

Gold bugs

An Australian study in Geology of biofilms on gold finds that the bacteria-driven "dissolution, precipitation, and aggregation lead to the formation of bacterioform Au and contribute to the growth of Au grains under supergene conditions..." [right, credit USGS]

It sounds like the bacterial bio-films dissolve the gold into nanoparticles and redeposit them as grains that can be purer than the original source. News reports describe it as a way of growing nuggets.

Ref: Nanoparticle factories: Biofilms hold the key to gold dispersion and nugget formation, doi: 10.1130/G31052.1 v. 38 no. 9 p. 843-846

1 comment:

  1. We were just talking about this at

    Thanks for the writeup!

    Cheers -- Pete Tillman