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Biorecovery of Gold from Jewellery Wastes by Escherichia Coli and Biomanufacture of Active Au-Nanomaterial

Authors :
Lynne E. Macaskie
Kevin Deplanche
Gary Anthony Attard
Source :
Advanced Materials Research. :647-650
Publication Year :
2007
Publisher :
Trans Tech Publications, Ltd., 2007.

Abstract

Microbial reduction of Au(III) from HAuCl4 was demonstrated. Escherichia coli and Desulfovibrio desulfuricans reduced 1 mM Au(III) in 60 and 120 min at pH 6.9 and 2.3 respectively. TEM and elemental analysis showed the formation of Au(0) nanoparticles and their pH-dependent cellular localisation. The concept was applied to the recovery of gold from jewellery waste leachates using E. coli. Bio-Au(0) nanoparticles were tested for catalytic activity in the oxidation of glycerol, achieving 30% conversion to glyceric acid. A simple bioprocess for conversion of waste to new material is suggested.

Details

ISSN :
16628985
Database :
OpenAIRE
Journal :
Advanced Materials Research
Accession number :
edsair.doi...........03054d71f15e427814de5bdbea5eacbd