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| Content Provider | MDPI |
|---|---|
| Author | Drewniak, Lukasz Stasiuk, Robert Uhrynowski, Witold Sklodowska, Aleksandra |
| Abstract | The purpose of this study was a detailed characterization of Shewanella sp. O23S, a strain involved in arsenic transformation in ancient gold mine waters contaminated with arsenic and other heavy metals. Physiological analysis of Shewanella sp. O23S showed that it is a facultative anaerobe, capable of growth using arsenate, thiosulfate, nitrate, iron or manganite as a terminal electron acceptor, and lactate or citrate as an electron donor. The strain can grow under anaerobic conditions and utilize arsenate in the respiratory process in a broad range of temperatures (10–37 °C), pH (4–8), salinity (0%–2%), and the presence of heavy metals (Cd, Co, Cr, Cu, Mn, Mo, Se, V and Zn). Under reductive conditions this strain can simultaneously use arsenate and thiosulfate as electron acceptors and produce yellow arsenic (III) sulfide (As2S3) precipitate. Simulation of As-removal from water containing arsenate (2.5 mM) and thiosulfate (5 mM) showed 82.5% efficiency after 21 days of incubation at room temperature. Based on the obtained results, we have proposed a model of a microbially mediated system for self-cleaning of mine waters contaminated with arsenic, in which Shewanella sp. O23S is the main driving agent. |
| File Size | 2037760 |
| Ending Page | 14427 |
| Page Count | 19 |
| Starting Page | 14409 |
| File Format | |
| e-ISSN | 14220067 |
| DOI | 10.3390/ijms160714409 |
| Journal | International Journal of Molecular Sciences |
| Issue Number | 7 |
| Volume Number | 16 |
| Language | English |
| Publisher Date | 2015-06-25 |
| Access Restriction | Open |
| Subject Keyword | Shewanella spp. dissimilatory arsenate reduction arsenic removal |
| Content Type | Text |
| Resource Type | Article |
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