A comparison of Fe(III) reduction rates between fresh and aged biogenic iron oxides (BIOS) by Shewanella putrefaciens CN32
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- 作者：Tarek Najema ; Sean Langleyb ; Danielle Fortina ; dfortin@uottawa.ca" class="auth_mail" title="E-mail the corresponding author
- 关键词：BIOS ; Ferrihydrite ; Ageing ; Aggregation ; Iron reduction ; Shewanella putrefaciens
- 刊名：Chemical Geology
- 出版年：2016
- 出版时间：7 November 2016
- 年：2016
- 卷：439
- 期：Complete
- 页码：1-12
- 全文大小：1989 K
文摘
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Ageing of BIOS for ~ 5 years at 4°C did not influence the composition or proportion of Fe-bearing minerals within BIOS.
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Bacterial cells and their polymers likely stabilized 2-line ferrihydrite against transformation.
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The rates of microbial Fe(III) reduction of aged BIOS were significantly lower than that of fresh BIOS.
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TEM of aged BIOS revealed aggregation of ferrihydrite nanoparticles and possible development of crystallinity.