alexa The Impact of Nano-Silver on Bacterial Aerobic Nitrate Reductase
ISSN: 2155-9821

Journal of Bioprocessing & Biotechniques
Open Access

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Research Article

The Impact of Nano-Silver on Bacterial Aerobic Nitrate Reductase

Shahrokh S1, Hosseinkhani B2 and Emtiazi G1*
1Department of biology, The University of Isfahan, Isfahan, I.R. Iran
2Laboratory of Microbial Ecology and Technology (LabMET), Ghent University, Coupure Links 653, B-9000 Gent, Belgium
Corresponding Author : Giti Emtiazi
Department of biology
The University of Isfahan, Isfahan, Iran
Tel: 0098-311-7932457
E-mail: [email protected]
Received March 01, 2014; Accepted April 28, 2014; Published May 03, 2014
Citation: Shahrokh S, Hosseinkhani B, Emtiazi G (2014) The Impact of Nano-Silver on Bacterial Aerobic Nitrate Reductase. J Bioproces Biotechniq 4:162. doi: 10.4172/2155-9821.1000162
Copyright: © 2014 Shahrokh S, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
 

Abstract

Due to the effective antimicrobial properties of silver nanoparticles (Ag-NPs), these particles are receiving an extensive interest for applying in wide range of consumer products and water purification systems. Entering the Agbased material in wastewater system can influence the biological cycle such as nitrogen. Denitrification as a part of nitrogen cycle is an effective biological process in wastewater systems which can be affected by Ag-NPs. The objective of this research was to study the impact of Ag-NPs on aerobic nitrate reduction. We showed that Rhizobium sp and Azotobacter sp isolates were able to reduce nitrate aerobically. Adding 0.2 ppm of Ag-NPs in culture medium of Azotobacter PHB+ enhanced the nitrate reduction activity about 20% and Ag-NPs at this concentration has no significant effect on the nitrate reduction activity of periplasmic extracts of the selected isolates in aerobic conditions. Thus, it seems that entering certain concentration of Ag-NPs in environments has no significant impact on microbial aerobic denitrification as a certain part of nitrogen cycle.

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