Iron phosphate mediated magnetite synthesis: a bioinspired approach

Giulia Mirabello*, Matthew GoodSmith, Paul H.H. Bomans, Linus Stegbauer, Derk Joester, Gijsbertus de With

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The biomineralization of intracellular magnetite in magnetotactic bacteria (MTB) is an area of active investigation. Previous work has provided evidence that magnetite biomineralization begins with the formation of an amorphous phosphate-rich ferric hydroxide precursor phase followed by the eventual formation of magnetite within specialized vesicles (magnetosomes) through redox chemical reactions. Although important progress has been made in elucidating the different steps and possible precursor phases involved in the biomineralization process, many questions still remain. Here, we present a novelin vitromethod to form magnetite directly from a mixed valence iron phosphate precursor, without the involvement of other known iron hydroxide precursors such as ferrihydrite. Our results corroborate the idea that phosphate containing phases likely play an iron storage role during magnetite biomineralization. Further, our results help elucidate the influence of phosphate ions on iron chemistry in groundwater and wastewater treatment.

Original languageEnglish (US)
Pages (from-to)9458-9465
Number of pages8
JournalChemical Science
Volume12
Issue number27
DOIs
StatePublished - Jul 21 2021

ASJC Scopus subject areas

  • Chemistry(all)

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