Optimising the transport properties and reactivity of microbially-synthesised magnetite for in situ remediation

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-sc...

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Autores principales: Joshi, Nimisha, Liu, Feixue, Watts, Mathew Paul, Williams, Heather, Coker, Victoria S., Schmid, Doris, Hofmann, Thilo, Lloyd, Jonathan R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5844888/
https://www.ncbi.nlm.nih.gov/pubmed/29523841
http://dx.doi.org/10.1038/s41598-018-21733-y
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author Joshi, Nimisha
Liu, Feixue
Watts, Mathew Paul
Williams, Heather
Coker, Victoria S.
Schmid, Doris
Hofmann, Thilo
Lloyd, Jonathan R.
author_facet Joshi, Nimisha
Liu, Feixue
Watts, Mathew Paul
Williams, Heather
Coker, Victoria S.
Schmid, Doris
Hofmann, Thilo
Lloyd, Jonathan R.
author_sort Joshi, Nimisha
collection PubMed
description 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.
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spelling pubmed-58448882018-03-14 Optimising the transport properties and reactivity of microbially-synthesised magnetite for in situ remediation Joshi, Nimisha Liu, Feixue Watts, Mathew Paul Williams, Heather Coker, Victoria S. Schmid, Doris Hofmann, Thilo Lloyd, Jonathan R. Sci Rep Article 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. Nature Publishing Group UK 2018-03-09 /pmc/articles/PMC5844888/ /pubmed/29523841 http://dx.doi.org/10.1038/s41598-018-21733-y Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Joshi, Nimisha
Liu, Feixue
Watts, Mathew Paul
Williams, Heather
Coker, Victoria S.
Schmid, Doris
Hofmann, Thilo
Lloyd, Jonathan R.
Optimising the transport properties and reactivity of microbially-synthesised magnetite for in situ remediation
title Optimising the transport properties and reactivity of microbially-synthesised magnetite for in situ remediation
title_full Optimising the transport properties and reactivity of microbially-synthesised magnetite for in situ remediation
title_fullStr Optimising the transport properties and reactivity of microbially-synthesised magnetite for in situ remediation
title_full_unstemmed Optimising the transport properties and reactivity of microbially-synthesised magnetite for in situ remediation
title_short Optimising the transport properties and reactivity of microbially-synthesised magnetite for in situ remediation
title_sort optimising the transport properties and reactivity of microbially-synthesised magnetite for in situ remediation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5844888/
https://www.ncbi.nlm.nih.gov/pubmed/29523841
http://dx.doi.org/10.1038/s41598-018-21733-y
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