Formation of Magnetic Minerals by Non-Magnetotactic Prokaryotes

Coker, Victoria S.; Pattrick, R. A. D.; Laan, G. van der; Lloyd, Jonathan R.

doi:10.1007/7171_047

Cited by 11 publications

(9 citation statements)

References 101 publications

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“…[41][42][43][44] First row transition metals Co, Ni, Mn, Cr and Zn have all been successfully incorporated into the bionanomagnetite structure using Fe(III)-reducing bacteria Table 1 for details).…”

Section: Metal Doped Magnetitesmentioning

confidence: 99%

Extracellular bacterial production of doped magnetite nanoparticles

Pattrick¹,

Coker²,

Pearce³

et al. 2012

Nanoscience

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Microorganisms have been producing nanoparticles for billions of years and by controlling and tuning this productivity they have the potential to provide novel materials using environmentally friendly manufacturing pathways. Metal-reducing bacteria are a particularly fertile source of nanoparticles and their reduction of Fe (III) oxides leads to the formation of ferrite spinel nanoparticles, especially magnetite, Fe 3 O 4 . The high yields produced by extracellular biomineralising processes make them commercially attractive, and the production of these bionano ferrite spinels can be tuned by doping the precursor Fe(III) phase with Co, Ni, Zn, Mn and V. The oxidation state of the cations and the sites of substitution are determined by X-ray absorption spectroscopy (XAS), especially by examination of metal L-edge spectra and X-ray magnetic circular dichroism (XMCD). Vanadium substitution in bionano ferrite spinels is revealed for the first time, and substitution in the octahedral site as V(III) confirmed. Bionanomagnetite is shown to be effective in the remediation of azo dyes with the complete breakdown of Remazol Black B to colourless amines and acids. XMCD shows this to involve oxidation of the surface Fe(III) and the potential for regeneration of the nanoparticles.

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Section: Metal Doped Magnetitesmentioning

confidence: 99%

Extracellular bacterial production of doped magnetite nanoparticles

Pattrick¹,

Coker²,

Pearce³

et al. 2012

Nanoscience

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“…Building on pioneering work on Fe(III)-reducing bacteria (Lovley et al, 1987), recent work by our group has shown that the anaerobic Fe(III)-reducing bacteria Geobacter sulfurreducens and Shewanella oneidensis can produce similar nanocrystalline transition metal-substituted spinels (Coker et al, 2006. Production can be achieved at ambient temperatures through the dissimilatory reduction of Fe(III)-oxyhydroxides containing the substitutional cations Ni, Co, Mn, Zn, V or Cr.…”

Section: Bionanominerals Formed By Microbial Fe(iii) Reductionmentioning

confidence: 99%

Biomineralization: linking the fossil record to the production of high value functional materials

et al. 2008

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The microbial cell offers a highly efficient template for the formation of nanoparticles with interesting properties including high catalytic, magnetic and light-emitting activities. Thus biomineralization products are not only important in global biogeochemical cycles, but they also have considerable commercial potential, offering new methods for material synthesis that eliminate toxic organic solvents and minimize expensive high-temperature and pressure processing steps. In this review we describe a range of bacterial processes that can be harnessed to make precious metal catalysts from waste streams, ferrite spinels for biomedicine and catalysis, metal phosphates for environmental remediation and biomedical applications, and biogenic selenides for a range of optical devices. Recent molecular-scale studies have shown that the structure and properties of bionanominerals can be fine-tuned by subtle manipulations to the starting materials and to the genetic makeup of the cell. This review is dedicated to the late Terry Beveridge who contributed much to the field of biomineralization, and provided early models to rationalize the mechanisms of biomineral synthesis, including those of geological and commercial potential.

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“…The synthesis of nano-sized minerals using microorganisms would receive an advantage from the development of clean, nontoxic, and environmentally acceptable chemistry procedures [1][2][3][4]. However, this method is still in its development stage which is attributed to difficulties in controlling the size and physical properties of the particles.…”

Section: Introductionmentioning

confidence: 99%

Effects of Microbial Growth Conditions on Synthesis of Magnetite Nanoparticles using Indigenous Fe(III)-Reducing Bacteria

Kim

Roh

2018

Minerals

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Abstract:Recent researches have shown that microbe-metal interactions play an important role in metal cycling and biomineralization in subsurface environments. The objective of this research was to study the effects of microbial growth conditions for size control on the synthesis of magnetite nanoparticles using Fe(III)-reducing bacteria enriched from intertidal flat sediments in Korea. The microbial formation of the magnetite nanoparticles was examined under various incubation temperatures (8-35 • C), concentrations (20-60 mM) of magnetite precursor, medium pHs (6.5-8.5), and incubation times (0-3 weeks). The Fe(III)-reducing bacteria formed 2~10 nm-sized magnetite (Fe 3 O 4 ) by reduction of 40 mM akaganeite, especially under the conditions at 25 • C and medium pH = 8.5 within a 1-week incubation time. The magnetite nanoparticles formed by microbial processes exhibited superparamagnetic behavior.

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Formation of Magnetic Minerals by Non-Magnetotactic Prokaryotes

Cited by 11 publications

References 101 publications

Extracellular bacterial production of doped magnetite nanoparticles

Extracellular bacterial production of doped magnetite nanoparticles

Biomineralization: linking the fossil record to the production of high value functional materials

Effects of Microbial Growth Conditions on Synthesis of Magnetite Nanoparticles using Indigenous Fe(III)-Reducing Bacteria

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