Effects of Dissolved Silver and Silver Nanoparticle on Soil Microorganisms | ||
| Journal of Soil and Water Sciences | ||
| Article 1, Volume 3, Issue 1, January 2017, Pages 1-5 PDF (9.38 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jsws.2017.6679 | ||
| Author | ||
| Ezzat Marzouk | ||
| Soil and Water Sciences Department, Faculty of Environmental Agricultural Sciences, Arish University, North Sinai 45516, Egypt | ||
| Abstract | ||
| Silver nanoparticles (AgNPs) are the most commonly used man-made nanomaterial in consumer products. They are merged into a vast collection of products due to their particular broad-spectrum anti-microbial action. On the other hand, their anti-bacterial properties may pose a significant environmental risk. This study was undertaken to assess whether the risk that AgNPs and dissolved Ag pose to soil microorganisms gained from nano- or dissolved-silver forms. The antimicrobial effect of green manufactured AgNPs (46.2±23.2 nm) and Ag+ (as AgNO3) on soil microbes were studied using disc diffusion assay. Soil microbial growth was assessed by the measurement of inhibitory zone area (mm2) as a function of different AgNPs and AgNO3 concentrations, 0.00, 250, 500, 1000 and 2000 mgl-1. The results of antimicrobial effect of AgNPs showed 10 fold of magnitude comparing with Ag+ at lower concentrations (250 mgl-1). The theoretical predicted unity of inhibition zone ratio for AgNPs/Ag ions implies that AgNPs equates to about 5 times antimicrobial effects of Ag+. Although the current results confirm that Ag antimicrobial effect is a nano-specific effect, different bacteria isolated from different soils should be used to explore their physico-chemical properties in mitigating AgNPs toxicity effects. | ||
| Keywords | ||
| silver nanoparticles; dissolved silver; antimicrobial effects; soil microorganisms | ||
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