Artículo
Chromium (VI) remediation by a native strain: effect of environmental conditions and removal mechanisms involved
González, Paola Solange
; Ambrosio, Laura Fernanda
; Paisio, Cintia Elizabeth
; Talano, Melina Andrea
; Medina, Maria I.; Agostini, Elizabeth
Fecha de publicación:
07/2014
Editorial:
Springer Heidelberg
Revista:
Environmental Science and Pollution Research
ISSN:
0944-1344
e-ISSN:
1614-7499
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
A native bacterial strain with high capability for Cr (VI) removal was isolated from tannery sediments located in Elena (Córdoba Province, Argentina). The strain was characterized by amplification of 16S rRNA gene and identified as Serratia sp. C8. It was able to efficiently remove different Cr (VI) concentrations in a wide range of pHs and temperatures. The addition of different carbon sources as well as initial inoculum concentration were analyzed, demonstrating that Serratia sp. C8 could reduce 80 % of 20 mg/L Cr (VI) in a medium containing glucose 1 g/L, at pH 6–7 and 28 °C as optimal conditions, using 5 % inoculum concentration. The mechanisms involved in Cr (VI) removal were also evaluated. The strain was capable of biosorpting around 7.5–8.5 % of 20 mg/L Cr on its cell surface and to reduce Cr (VI). In addition, approximately a 54 and 46 % of total Cr was detected in the biomass and in the culture medium, respectively, and in the culture medium, Cr (III) was the predominant species. In conclusion, Serratia sp. C8 removed Cr (VI) and the mechanisms involved in decreasing order of contribution were as follows: reduction catalyzed by intracellular enzymes, accumulation into the cells, and biosorption to the microbial biomass. This strain could be a suitable microorganism for Cr (VI) bioremediation of tannery sediments and effluents or even for other environments contaminated with Cr.
Palabras clave:
Chromium
,
Tannery
,
Bioremediation
,
Serratia Sp
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Identificadores
Colecciones
Articulos(CCT - CORDOBA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - CORDOBA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - CORDOBA
Citación
González, Paola Solange; Ambrosio, Laura Fernanda; Paisio, Cintia Elizabeth; Talano, Melina Andrea; Medina, Maria I.; et al.; Chromium (VI) remediation by a native strain: effect of environmental conditions and removal mechanisms involved; Springer Heidelberg; Environmental Science and Pollution Research; 21; 23; 7-2014; 13551-13559
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