Paper Titles
Waste Fungal Biomass for Mercury Biosorption – Column Studies
p.623
Removal of Copper and Uranium from Contaminated Waters in Biosorption Columns
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Sorption of Copper Ions by Biogenic Iron Sulphides
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Mercury Sorption on Chitosan
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Heavy Metal Tolerance and Copper Uptake in Yeast Isolated from Patagonia/ Argentina
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Characterization of Cellulosic Biomass Loaded with Iron and Arsenic Using High Energy X-Rays
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Biorecovery of Gold from Jewellery Wastes by Escherichia Coli and Biomanufacture of Active Au-Nanomaterial
p.647
Biorecovery of Platinum Group Metals from Secondary Sources
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A Novel Fuel Cell Catalyst for Clean Energy Production Based on a Bionanocatalyst
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Biorecovery of Gold from Jewellery Wastes by Escherichia Coli and Biomanufacture of Active Au-Nanomaterial

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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.

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Periodical:

Advanced Materials Research (Volumes 20-21)

Pages:

647-650

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.20-21.647

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Online since:

July 2007

Authors:

K. Deplanche, G.A. Attard, Lynne E. Macaskie

Keywords:

Biorecovery, Bioreduction, Catalysis, Desulfovibrio desulfuricans, Escherichia coli, Gold

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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