| Titre : | Hexavalent chromium bioremoval through adaptation and consortia development from sukinda chromite mine isolates (2012) |
| Auteurs : | Jastin Samuel, Auteur ; Madona L Paul, Auteur ; Mrudula Pulimi, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 51 N° 9, Mars 2012) |
| Article en page(s) : | pp. 3740-3749 |
| Note générale : | Chimie industrielle |
| Langues : | Anglais |
| Tags : | Chromite mine isolates |
| Résumé : | Indigenous isolates from the waters of chromite mining sites at Sukinda Valley, Orissa, India, showed a considerable enhancement in Cr (VI) bioreduction rate through adaptation and consortia development. On the basis of 16S-rRNA sequencing, these isolates were identified as Bacillus subtilis VTTSUKMW1, Acinetobacter junii VITSUKMW2, and Escherichia coli VITSUKMW3. The native isolates showed a high tolerance at 500-1000 mg L―1 of Cr (VI). An increase in the reduction rate from 0.199-0.477 mg L―1 h―1 to 0.5-1.16 mg L―1 h―1 at 5-20 mg L―1 of initial Cr (VI) concentration was achieved by the adapted isolates. An increase in the growth rate and Cr (VI) reduction rate [0.86―2.6813 mg L―1 h―1 at 5―100 mg L―1 of initial Cr (VI) concentration] was observed in the ternary consortium of adapted isolates. The FT-IR spectra revealed the active participation of the bacterial surface groups in the reduction. The development of sequential processes (native → adapted → consortia) employing Cr (VI) tolerant isolates, proves to be a potential bioremediation strategy for specific chromite mine sites. |
| ISSN : | 0888-5885 |
| En ligne : | http://pubs.acs.org/doi/abs/10.1021/ie201796s |
