Biomagnetic recovery and bioaccumulation of selenium granules in magnetotactic bacteria

Masayoshi Tanaka, William Knowles, Rosemary Brown, Nicole Hondow, Atsushi Arakaki, Stephen Baldwin, Sarah Staniland, Tadashi Matsunaga

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Using microorganisms to remove waste and/or neutralize pollutants from contaminated water is attracting much attention due to the environmentally friendly nature of this methodology. However, cell recovery remains a bottleneck and a considerable challenge for the development of this process. Magnetotactic bacteria are a unique group of organisms that can be manipulated by an external magnetic field due to the presence of biogenic magnetite crystals formed within their cells. In this study, we demonstrated an account of accumulation and precipitation of amorphous elemental selenium nanoparticles within magnetotactic bacteria alongside and independent of magnetite crystal biomineralization when grown in a medium containing selenium oxyanion (SeO3 2-). Quantitative analysis shows that magnetotactic bacteria accumulate the largest amount of target molecules (Se) per cell compared with any other previously reported nonferrous metal/metalloid. For example, 2.4 and 174 times more Se is accumulated than Te taken up into cells and Cd2+ adsorbed onto the cell surface, respectively. Crucially, the bacteria with high levels of Se accumulation were successfully recovered with an external magnetic field. The biomagnetic recovery and the effective accumulation of target elements demonstrate the potential for application in bioremediation of polluted water.

Original languageEnglish
Pages (from-to)3886-3891
Number of pages6
JournalApplied and Environmental Microbiology
Volume82
Issue number13
DOIs
Publication statusPublished - 2016
Externally publishedYes

Fingerprint

bioaccumulation
Selenium
selenium
granules
Bacteria
bacterium
Ferrosoferric Oxide
bacteria
magnetite
Magnetic Fields
magnetic fields
cells
crystals
crystal
magnetic field
biomineralization
Water Pollutants
Metalloids
Environmental Biodegradation
bioremediation

ASJC Scopus subject areas

  • Biotechnology
  • Food Science
  • Applied Microbiology and Biotechnology
  • Ecology

Cite this

Biomagnetic recovery and bioaccumulation of selenium granules in magnetotactic bacteria. / Tanaka, Masayoshi; Knowles, William; Brown, Rosemary; Hondow, Nicole; Arakaki, Atsushi; Baldwin, Stephen; Staniland, Sarah; Matsunaga, Tadashi.

In: Applied and Environmental Microbiology, Vol. 82, No. 13, 2016, p. 3886-3891.

Research output: Contribution to journalArticle

Tanaka, M, Knowles, W, Brown, R, Hondow, N, Arakaki, A, Baldwin, S, Staniland, S & Matsunaga, T 2016, 'Biomagnetic recovery and bioaccumulation of selenium granules in magnetotactic bacteria', Applied and Environmental Microbiology, vol. 82, no. 13, pp. 3886-3891. https://doi.org/10.1128/AEM.00508-16
Tanaka, Masayoshi ; Knowles, William ; Brown, Rosemary ; Hondow, Nicole ; Arakaki, Atsushi ; Baldwin, Stephen ; Staniland, Sarah ; Matsunaga, Tadashi. / Biomagnetic recovery and bioaccumulation of selenium granules in magnetotactic bacteria. In: Applied and Environmental Microbiology. 2016 ; Vol. 82, No. 13. pp. 3886-3891.
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