Titel
Optimising the transport properties and reactivity of microbially-synthesised magnetite for in situ remediation
Autor*in
Nimisha Joshi
Williamson Research Centre for Molecular Environmental Science, School of Earth and Environmental Science, University of Manchester
Feixue Liu
Williamson Research Centre for Molecular Environmental Science, School of Earth and Environmental Science, University of Manchester
Mathew Paul Watts
Williamson Research Centre for Molecular Environmental Science, School of Earth and Environmental Science, University of Manchester
... show all
Abstract
Engineered nanoparticles offer the potential for remediation of land and water that has been contaminated by organics and metals. Microbially synthesized nano-scale magnetite, prepared from Fe(III) oxides by subsurface Fe(III)-reducing bacteria, offers a scalable biosynthesis route to such a nano-scale remediation reagent. To underpin delivery of “bionanomagnetite” (BNM) nanomaterial during in situ treatment options, we conducted a range of batch and column experiments to assess and optimise the transport and reactivity of the particles in porous media. Collectively these experiments, which include state of the art gamma imaging of the transport of 99m Tc-labelled BNM in columns, showed that non-toxic, low cost coatings such as guar gum and salts of humic acid can be used to enhance the mobility of the nanomaterial, while maintaining reactivity against target contaminants. Furthermore, BNM reactivity can be enhanced by the addition of surface coatings of nano-Pd, extending the operational lifetime of the BNM, in the presence of a simple electron donor such as hydrogen or formate.
Stichwort
BiogeochemistryPollution remediation
Objekt-Typ
Sprache
Englisch [eng]
Persistent identifier
phaidra.univie.ac.at/o:1075126
Erschienen in
Titel
Scientific Reports
Band
8
Publication
Springer Science and Business Media LLC
Fördergeber
European Union (all programmes) — 309517
Erscheinungsdatum
2018
Zugänglichkeit
Rechte
Rechteangabe
© The Author(s) 2018
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