Journal ArticleDOI
Behavior of Metallic Silver Nanoparticles in a Pilot Wastewater Treatment Plant
Ralf Kaegi,Andreas Voegelin,Brian Sinnet,S. Zuleeg,Harald Hagendorfer,Michael Burkhardt,Hansruedi Siegrist +6 more
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Results from batch experiments suggested that Ag-NP transformation to Ag(2)S occured in the nonaerated tank within less than 2 h, which must be considered in future risk assessments.Abstract:
We investigated the behavior of metallic silver nanoparticles (Ag-NP) in a pilot wastewater treatment plant (WWTP) fed with municipal wastewater. The treatment plant consisted of a nonaerated and an aerated tank and a secondary clarifier. The average hydraulic retention time including the secondary clarifier was 1 day and the sludge age was 14 days. Ag-NP were spiked into the nonaerated tank and samples were collected from the aerated tank and from the effluent. Ag concentrations determined by inductively coupled plasma-mass spectrometry (ICP-MS) were in good agreement with predictions based on mass balance considerations. Transmission electron microscopy (TEM) analyses confirmed that nanoscale Ag particles were sorbed to wastewater biosolids, both in the sludge and in the effluent. Freely dispersed nanoscale Ag particles were only observed in the effluent during the initial pulse spike. X-ray absorption spectroscopy (XAS) measurements indicated that most Ag in the sludge and in the effluent was present a...read more
Citations
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Journal ArticleDOI
The presence of contaminations in sewage sludge - The current situation.
TL;DR: A review on quality of sewage sludge based on the publications after 2010 has been presented and there are several papers focusing on new serious threats to human health and ecosystem occurring in sewageSludge.
Journal ArticleDOI
Sulfidation of Silver Nanoparticles Decreases Escherichia coli Growth Inhibition
Brian C. Reinsch,Clément Levard,Clément Levard,Z. Li,Z. Li,Rui Ma,Rui Ma,A. Wise,Kelvin B. Gregory,Kelvin B. Gregory,Gordon E. Brown,Gordon E. Brown,Gordon E. Brown,Gregory V. Lowry,Gregory V. Lowry +14 more
TL;DR: The results suggest that the initial properties of AgNPs can affect sulfidation products, which in turn affect microbial growth inhibition, and that these properties should be considered in assessing the environmental impact of Ag NPs.
Journal ArticleDOI
Comparative evaluation of antimicrobials for textile applications.
TL;DR: Each antimicrobial technology has specific risks and benefits that should be taken into account in evaluating the suitability of different antimicrobial products, and results indicated that nanoscale silver and silver salts that achieve functionality with very low application rates offer clear potential benefits for textile use.
Journal ArticleDOI
Size discrimination and detection capabilities of single-particle ICPMS for environmental analysis of silver nanoparticles.
TL;DR: The detection capabilities of single particle inductively coupled plasma-mass spectrometry with respect to particle size and number concentrations are investigated and the potential of spICPMS for environmental detection of nanoparticles is demonstrated for a wastewater treatment plant effluent sample.
Journal ArticleDOI
Characterization of silver release from commercially available functional (nano)textiles.
Christiane Lorenz,L. Windler,N. von Goetz,R.P. Lehmann,M. Schuppler,Konrad Hungerbühler,Manfred Heuberger,Bernd Nowack +7 more
TL;DR: Investigating the release of silver from eight different commercially available silver-textiles during a washing and rinsing cycle shows that different silver textiles release different forms of silver during washing and that among the textiles investigated AgCl was the most frequently observed chemical form in the washwater.
References
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ATHENA, ARTEMIS, HEPHAESTUS: data analysis for X-ray absorption spectroscopy using IFEFFIT.
Bruce Ravel,Matthew Newville +1 more
TL;DR: A software package for the analysis of X-ray absorption spectroscopy (XAS) data is presented, based on the IFEFFIT library of numerical and XAS algorithms and is written in the Perl programming language using the Perl/Tk graphics toolkit.
Journal ArticleDOI
The bactericidal effect of silver nanoparticles
Jose Ruben Morones,Jose Luis Elechiguerra,A. Camacho,Katherine B. Holt,Juan B. Kouri,Jose Tapia Ramirez,Miguel Jose Yacaman +6 more
TL;DR: The results indicate that the bactericidal properties of the nanoparticles are size dependent, since the only nanoparticles that present a direct interaction with the bacteria preferentially have a diameter of approximately 1-10 nm.
Journal ArticleDOI
Silver nanoparticles as antimicrobial agent: a case study on E. coli as a model for Gram-negative bacteria
Ivan Sondi,Branka Salopek-Sondi +1 more
TL;DR: These nontoxic nanomaterials, which can be prepared in a simple and cost-effective manner, may be suitable for the formulation of new types of bactericidal materials.
Journal ArticleDOI
Does the antibacterial activity of silver nanoparticles depend on the shape of the nanoparticle? A study of the Gram-negative bacterium Escherichia coli.
TL;DR: This is the first comparative study on the bactericidal properties of silver nanoparticles of different shapes, and the results demonstrate thatsilver nanoparticles undergo a shape-dependent interaction with the gram-negative organism E. coli.
Journal ArticleDOI
Modeled Environmental Concentrations of Engineered Nanomaterials (TiO2, ZnO, Ag, CNT, Fullerenes) for Different Regions
TL;DR: The results of this study indicate that risks to aquatic organisms may currently emanate from nano- Ag, nano-TiO(2), and nano-ZnO in sewage treatment effluents for all considered regions and for nano-Ag in surface waters.
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