ISSN: 0973-7510

E-ISSN: 2581-690X

R. Jayalakshmi and Antony V. Samrot
1Department of Biotechnology, Sathyabama University, Jeppiaar Nagar, Rajiv Gandhi Salai, Sholinganallur, Chennai – 600 119, India.
J Pure Appl Microbiol. 2014;8(1):677-680
© The Author(s). 2014
Received: 02/05/2013 | Accepted: 17/06/2013 | Published: 28/02/2014

Results of observation and preliminary analysis on mineralogical composition, chemical and structural characteristics of iron oxides precipitated from FeSO4 by Klebsiella sp SU-14 are presented here. In this study, Klebsiella sp SU-14 was allowed to grow in FeSO4 rich medium, the organism was able to convert FeSO4 into iron oxides extracellularly through biologically induced mineralization (BIM). These extracellular precipitated biogenic iron oxide mineral particles were analyzed by following physicochemical methods:  Fourier transformed infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) combined with energy dispersive X-rays (EDX) analysis. From these analyses the phase composition and physicochemical properties of iron oxides were obtained. Observations of these results revealed that the biogenic iron oxides particles were confirmed as magnetite (Fe3O4) which has different morphological characteristics with micrometer size distributions.


Iron oxides, Klebsiella sp SU-14, FT-IR, Thermal field emission scanning electron microscope –EDX

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