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Se (IV) triggers faster Te (IV) reduction by soil isolates of heterotrophic aerobic bacteria: formation of extracellular SeTe nanospheres

Bajaj, M.; Winter, J.


Selenium and Tellurium have many common chemical properties as both belong to group 16 of the periodic table. High toxicities of Se and Te oxyanions cause environmental problems in contaminated soils and waters. Three strains (C4, C6 and C7) of selenite reducing and nanoparticle forming aerobic bacteria which were isolated from agricultural soils of India containing high concentrations of Se were investigated after 3.5 months of freeze-storage for their resistance against the toxic oxyanion tellurite and its reduction to non toxic elemental form Te0 as well as nanoparticles formation.


Strains C4, C6 and C7 reduced tellurite at maximum reduction rates of 2.3, 1.5 and 2.1 mg Te (IV)/L/d, respectively and produced extracellular Te0 nanospheres as revealed from SEM-EDX analysis. Production of extracellular Te nanospheres has been described seldom. Further, concurrent reduction of both selenite and tellurite by bacteria was examined as these toxic oxyanions are often present together in natural environments, mine tailings or wastewater from copper refining. Interestingly, bioreduction of 100 mg/L selenite in s ... mehr

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DOI: 10.5445/IR/1000046376
DOI: 10.1186/s12934-014-0168-2
Zitationen: 9
Web of Science
Zitationen: 8
Zugehörige Institution(en) am KIT Institut für Ingenieurbiologie und Biotechnologie des Abwassers (IBA)
Publikationstyp Zeitschriftenaufsatz
Jahr 2014
Sprache Englisch
Identifikator ISSN: 1475-2859
KITopen-ID: 1000046376
Erschienen in Microbial Cell Factories
Band 13
Heft 1
Seiten 168
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Schlagworte Aerobes; Bioreduction; Selenite; Tellurite; Extracellular nanospheres
Nachgewiesen in Scopus
Web of Science
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