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Electron Microscopy and X-ray Analysis of Cr-Containing Precipitates Synthesized by Newly Isolated Actinobacterium,Flexivirga alba ST13T |
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| Authors: | Tomoyasu Sugiyama Toshifumi Sakaguchi |
| Affiliation: | 1. School of Bioscience and Biotechnology, Tokyo University of Technology, 1401-1 Katakura-machi, Hachioji, Tokyo, 192-0982, Japan 2. Faculty of Life and Environmental Sciences, Prefectural University Hiroshima, 562 Nanatsuka-cho, Shobara, Hiroshima, Hiroshima, 727-0023, Japan |
| Abstract: | Chromium(Cr) precipitate synthesized by Cr(VI)-reducing bacterium Flexivirga alba ST13T was examined using transmission electron microscopy (TEM) and the energy dispersive X-ray (EDX). The strain showed altered-morphology after exposing to Cr(VI) in minimal medium. The resultant precipitate included bacterial pellet and needle-like structure which was similar to the structure made from Cr(OH)3 precipitate. Cr was observed in bacterial cells using TEM–EDX. Bacteria with high electron density showed the precipitation of Ca in addition to Cr. The isolated strain would be useful to precipitate Cr from Cr(VI)-containing environment. |
| Keywords: | Chromium Electron microscopy Bacterium Actinobacterium |
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