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
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Book ChapterDOI
Bioavailability, Toxicity, and Fate of Manufactured Nanomaterials in Terrestrial Ecosystems
TL;DR: In this paper, the current state of the knowledge on the fate of nanomaterials in terrestrial ecosystems as well as their effects on critical terrestrial ecoreceptors, including plants, bacteria, fungi, and soil invertebrates are reviewed.
Journal ArticleDOI
Antifouling membranes prepared by electrospinning polylactic acid containing biocidal nanoparticles
TL;DR: In this paper, a non-woven electrospun polylactic acid (PLA) membranes containing functionalized sepiolite fibrillar particles (5.5 kg) were prepared and biofouled in a cross-flow filtration device using model biofoulants.
Journal ArticleDOI
Addressing the complexity of water chemistry in environmental fate modeling for engineered nanoparticles.
Nicole Sani-Kast,Martin Scheringer,Martin Scheringer,Danielle L. Slomberg,Jérôme Labille,Antonia Praetorius,Patrick Ollivier,Konrad Hungerbühler +7 more
TL;DR: The results shift the focus of future modeling and experimental research of ENP environmental fate to the water characteristic in regions near the expected ENP emission sources, under conditions favoring heteroaggregation in these regions, the fate of the ENPs can be readily predicted.
Journal ArticleDOI
A framework to measure the availability of engineered nanoparticles in soils : Trends in soil tests and analytical tools
Sónia M. Rodrigues,Tito Trindade,Armando C. Duarte,Eduarda Pereira,Gerwin F. Koopmans,Paul F.A.M. Römkens +5 more
TL;DR: In this article, the reactions of engineered nanoparticles (ENPs) in soils, with respect to their nanospecific properties, and observed effects of key soil properties (e.g. pH, ionic strength and natural colloids) on their stability in pore water are discussed.
Journal ArticleDOI
Effect of Laundry Surfactants on Surface Charge and Colloidal Stability of Silver Nanoparticles
Sara Skoglund,Troy A. Lowe,Jonas Hedberg,Eva Blomberg,Inger Odnevall Wallinder,Susanna Wold,Maria Lundin +6 more
TL;DR: The stability of the Ag NPs was shown to depend on the charge and concentration of the adsorbed surfactants, and such knowledge is important as it may influence the subsequent transport of AgNPs through different chemical transients and thus their potential bioavailability and toxicity.
References
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Journal ArticleDOI
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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