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DOI10.1073/pnas.2001740117
Biocement stabilization of an experimental-scale artificial slope and the reformation of iron-rich crusts
Alan Levett; Emma J. Gagen; Yitian Zhao; Paulo M. Vasconcelos; Gordon Southam
2020-07-21
发表期刊Proceedings of the National Academy of Sciences
出版年2020
英文摘要

Novel biotechnologies are required to remediate iron ore mines and address the increasing number of tailings (mine waste) dam collapses worldwide. In this study, we aimed to accelerate iron reduction and oxidation to stabilize an artificial slope. An open-air bioreactor was inoculated with a mixed consortium of microorganisms capable of reducing iron. Fluid from the bioreactor was allowed to overflow onto the artificial slope. Carbon sources from the bioreactor fluid promoted the growth of a surface biofilm within the artificial slope, which naturally aggregated the crushed grains. The biofilms provided an organic framework for the nucleation of iron oxide minerals. Iron-rich biocements stabilized the artificial slope and were significantly more resistant to physical deformation compared with the control experiment. These biotechnologies highlight the potential to develop strategies for mine remediation and waste stabilization by accelerating the biogeochemical cycling of iron.

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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/286822
专题资源环境科学
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Alan Levett,Emma J. Gagen,Yitian Zhao,et al. Biocement stabilization of an experimental-scale artificial slope and the reformation of iron-rich crusts[J]. Proceedings of the National Academy of Sciences,2020.
APA Alan Levett,Emma J. Gagen,Yitian Zhao,Paulo M. Vasconcelos,&Gordon Southam.(2020).Biocement stabilization of an experimental-scale artificial slope and the reformation of iron-rich crusts.Proceedings of the National Academy of Sciences.
MLA Alan Levett,et al."Biocement stabilization of an experimental-scale artificial slope and the reformation of iron-rich crusts".Proceedings of the National Academy of Sciences (2020).
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