NDLI: Characterization of a salt resistant bacterial strain Proteus sp. NA6 capable of decolorizing reactive dyes in presence of multi-metal stress

Content Provider	Springer Nature Link
Author	Abbas, Naila Hussain, Sabir Azeem, Farrukh Shahzad, Tanvir Bhatti, Sajjad Haider Imran, Muhammad Ahmad, Zulfiqar Maqbool, Zahid Abid, Muhammad
Copyright Year	2016
Abstract	Microbial biotechnologies for the decolorization of textile wastewaters have attracted worldwide attention because of their economic suitability and easiness in handling. However, the presence of high amounts of salts and metal ions in textile wastewaters adversely affects the decolorization efficiency of the microbial bioresources. In this regard, the present study was conducted to isolate salt tolerant bacterial strains which might have the potential to decolorize azo dyes even in the presence of multi-metal ion mixtures. Out of the tested 48 bacteria that were isolated from an effluent drain, the strain NA6 was found relatively more efficient in decolorizing the reactive yellow-2 (RY2) dye in the presence of 50 g L$^{−1}$ NaCl. Based on the similarity of its 16S rRNA gene sequence and its position in a phylogenetic tree, this strain was designated as Proteus sp. NA6. The strain NA6 showed efficient decolorization (>90 %) of RY2 at pH 7.5 in the presence of 50 g L$^{−1}$ NaCl under static incubation at 30 °C. This strain also had the potential to efficiently decolorize other structurally related azo dyes in the presence of 50 g L$^{−1}$ NaCl. Moreover, Proteus sp. NA6 was found to resist the presence of different metal ions (Co$^{+2}$, Cr$^{+6}$, Zn$^{+2}$, Pb$^{+2}$, Cu$^{+2}$, Cd$^{+2}$) and was capable of decolorizing reactive dyes in the presence of different levels of the mixtures of these metal ions along with 50 g L$^{−1}$ NaCl. Based on the findings of this study, it can be suggested that Proteus sp. NA6 might serve as a potential bioresource for the biotechnologies involving bioremediation of textile wastewaters containing the metal ions and salts.
Starting Page	1
Ending Page	12
Page Count	12
File Format	PDF
ISSN	09593993
Journal	World Journal of Microbiology and Biotechnology
Volume Number	32
Issue Number	11
e-ISSN	15730972
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-09-19
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Proteus sp. NA6 Reactive dyes Decolorization Salt and metal resistance Bioremediation Applied Microbiology Biotechnology Biochemistry Environmental Engineering/Biotechnology Microbiology
Content Type	Text
Resource Type	Article
Subject	Physiology Medicine Applied Microbiology and Biotechnology Biotechnology

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