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Gold Biorecovery from Plating Waste by Magnetotactic Bacterium, Magnetospirillum magneticum AMB-1

Published online by Cambridge University Press:  31 January 2011

Masayoshi Tanaka ,
Masaya Kawase ,
Tsuyoshi Tanaka  and
Tadashi Matsunaga
Masayoshi Tanaka
Affiliation:
mtanaka@cc.tuat.ac.jp, Tokyo University of Agriculture and Technology, Department of Biotechnology, Tokyo, Japan
Masaya Kawase
Affiliation:
tancho11@cc.tuat.ac.jp, Tokyo University of Agriculture and Technology, Department of Biotechnology, Tokyo, Japan
Tsuyoshi Tanaka
Affiliation:
tsuyo@cc.tuat.ac.jp, Tokyo University of Agriculture and Technology, Department of Biotechnology, Tokyo, Japan
Tadashi Matsunaga
Affiliation:
tmatsuna@cc.tuat.ac.jp, Tokyo University of Agriculture and Technology, Department of Biotechnology, Tokyo, Japan
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Abstract

Magnetotactic bacteria are a unique species of bacteria, commonly recognized by the presence of magnetic particles within them. These intracellular, nanosized magnetic particles enable the bacteria to migrate and be manipulated by magnetic force. To date, magnetotactic bacteria have been widely researched and implemented in various biotechnology based applications. In this study, as an extension to its applications, the magnetotactic bacterium, Magnetospirillum magneticum AMB-1, was applied in the microbial recovery of gold from plating waste. M. magneticum AMB-1 successfully precipitated approximately 42% and 100% of gold from growth medium containing 10 μM gold and from a mixture of plating waste/growth medium containing 0.4 μM gold, respectively. These observations and results strongly suggests that an important advancement in biorecovery of rare metals and bioremediation of toxic metals was achieved in which the application of whole cell bacteria, and direct precipitation of metals from plating waste using magnetotactic bacteria was performed for the first time.

Keywords

Auadsorptionenvironmentally benign
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1169: Symposium Q – Materials Science of Water Purification , 2009 , 1169-Q03-12
Copyright
Copyright © Materials Research Society 2009

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