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J Environ Manage. 2017 Apr 15;191:290-296. doi: 10.1016/j.jenvman.2017.01.028. Epub 2017 Jan 24.

Potential impacts of silver nanoparticles on bacteria in the aquatic environment.

Author information

1
Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB, T6G 2W2, Canada.
2
Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB, T6G 2W2, Canada. Electronic address: yang.liu@ualberta.ca.

Abstract

It is inevitable that nano-silver will be released into the environment. Therefore, there is an urgent need to better understand the effects of silver nanoparticles (Ag-NPs) on microbes in natural and engineered environments. The most remarkable gap in our knowledge on this lies on the low Ag-NPs dose side. This review summarized studies on the effects of Ag-NPs on bacteria from simple to complicated aquatic systems. A hormetic model with a narrow stimulatory zone has been proposed based on both experimental phenomenon and the potential mechanisms of the observed effects. Spectrum of the stimulating zone depends on Ag-NP properties, bacterial types and environmental conditions tested. This may become a concern in terms of Ag-NP disposal, and further research is required to build a sophisticated toxicity model for Ag-NPs.

KEYWORDS:

Antimicrobial effects; Resistance; Silver nanoparticles (Ag-NPs); Stimulatory response; Tolerance

PMID:
28129561
DOI:
10.1016/j.jenvman.2017.01.028
[Indexed for MEDLINE]

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