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A comparative analysis of tellurite detoxification by members of the genus <italic>Shewanella</italic>.

Authors :
Valdivia-González, M. A.
Díaz-Vásquez, W. A.
Ruiz-León, D.
Becerra, A. A.
Aguayo, D. R.
Pérez-Donoso, J. M.
Vásquez, C. C.
Source :
Archives of Microbiology; Mar2018, Vol. 200 Issue 2, p267-273, 7p
Publication Year :
2018

Abstract

The increasing industrial utilization of tellurium has resulted in an important environmental pollution with the soluble, extremely toxic oxyanion tellurite. In this context, the use of microorganisms for detoxifying tellurite or tellurium biorecovery has gained great interest. The ability of different &lt;italic&gt;Shewanella&lt;/italic&gt; strains to reduce tellurite to elemental tellurium was assessed; the results showed that the reduction process is dependent on electron transport and the ∆pH gradient. While &lt;italic&gt;S. baltica&lt;/italic&gt; OS155 showed the highest tellurite resistance, &lt;italic&gt;S. putrefaciens&lt;/italic&gt; was the most efficient in reducing tellurite. Moreover, pH-dependent tellurite transformation was associated with tellurium precipitation as tellurium dioxide. In summary, this work highlights the high tellurite reduction/detoxification ability exhibited by a number of &lt;italic&gt;Shewanella&lt;/italic&gt; species, which could represent the starting point to develop friendly methods for the recovery of elemental tellurium (or tellurium dioxide). [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
03028933
Volume :
200
Issue :
2
Database :
Complementary Index
Journal :
Archives of Microbiology
Publication Type :
Academic Journal
Accession number :
128149637
Full Text :
https://doi.org/10.1007/s00203-017-1438-2