Release of silver nanoparticles from outdoor facades

Kaegi, Rälf; Sinnet, Brian; Zuleeg, Steffen; Hagendorfer, Harald; Mueller, Elisabeth; Vonbank, R.; Boller, Markus; Burkhardt, Michael

doi:10.1016/j.envpol.2010.06.009

Cited by 476 publications

(309 citation statements)

References 24 publications

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“…The XPS spectra of PVP-and Cit-AgNP (Supporting Information Figure S1 and S2) suggested the presence of coating agents (PVP and citrate) in PVP-and CitAgNP colloids. 33,34 The signal of boron was observed in the XPS spectra of Bare-AgNP (Supporting Information Figure S3), demonstrating the occurrence of borate in the silver colloids, which was possibly derived from the decomposition of KBH 4 .…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The zeta potential of AgNPs in various electrolyte solution conditions was measured using Zetasizer Nano at 25°C. The zeta potential of AgNPs in NOM-free electrolyte solutions was measured at a range of NaClO 4 on a ZEN3600 Zetasizer Nano with 633 nm red laser and detection angle of 173°. The aggregation kinetics of AgNPs was first tested in mono/divalent electrolyte solutions without NOM.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Particle Coating-Dependent Interaction of Molecular Weight Fractionated Natural Organic Matter: Impacts on the Aggregation of Silver Nanoparticles

Yin

Shen

Tan

et al. 2015

Environ. Sci. Technol.

119

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Ubiquitous natural organic matter (NOM) plays an important role in the aggregation state of engineered silver nanoparticles (AgNPs) in aquatic environment, which determines the transport, transformation, and toxicity of AgNPs. As various capping agents are used as coatings for nanoparticles and NOM are natural polymer mixture with wide molecular weight (MW) distribution, probing the particle coating-dependent interaction of MW fractionated natural organic matter (M f -NOM) with various coatings is helpful for understanding the differential aggregation and transport behavior of engineered AgNPs as well as other metal nanoparticles. In this study, we investigated the role of pristine and M f -NOM on the aggregation of AgNPs with Bare, citrate, and PVP coating (Bare-, Cit-, and PVP-AgNP) in mono-and divalent electrolyte solutions. We observed that the enhanced aggregation or dispersion of AgNPs in NOM solution highly depends on the coating of AgNPs. Pristine NOM inhibited the aggregation of Bare-AgNPs but enhanced the aggregation of PVP-AgNPs. In addition, M f -NOM fractions have distinguishing roles on the aggregation and dispersion of AgNPs, which also highly depend on the AgNPs coating as well as the MW of M f -NOM. Higher MW M f -NOM (>100 kDa and 30−100 kDa) enhanced the aggregation of PVP-AgNPs in mono-and divalent electrolyte solutions, whereas lower MW M f -NOM (10−30 kDa, 3−10 kDa and <3 kDa) inhibited the aggregation of PVP-AgNPs. However, all the M f -NOM fractions inhibited the aggregation of Bare-AgNPs. For PVP-and BareAgNPs, the stability of AgNPs in electrolyte solution was significantly correlated to the MW of M f -NOM. But for Cit-AgNPs, pristine NOM and M f -NOM has minor influence on the stability of AgNPs. These findings about significantly different roles of M f -NOM on aggregation of engineered AgNPs with various coating are important for better understanding of the transport and subsequent transformation of AgNPs in aquatic environment.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Materials and Methodsmentioning

confidence: 99%

Particle Coating-Dependent Interaction of Molecular Weight Fractionated Natural Organic Matter: Impacts on the Aggregation of Silver Nanoparticles

Yin

Shen

Tan

et al. 2015

Environ. Sci. Technol.

119

View full text Add to dashboard Cite

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“…One of the physical processes that will influence the final destination of the PM-ENM is abrasion (process 8) or mechanical erosion. Abrasion is the process by which physical forces, such as turbulent fluid regimes or strong collision of solid materials, induce the breakdown of the original material and may lead to the release of PW-ENM-or PW-ENM-containing particles in different shapes and sizes [48][49][50][51][52]. Shear stress estimations may indicate the final shape and size of the PW-ENM after undergoing abrasion processes.…”

Section: Nanoparticle Releasementioning

confidence: 99%

“…Kaegi et al [51] presented direct evidence of the environmental release of nanoTiO 2 by leaching from painted house facades under the influence of sun and rain. The same authors recently showed evidence that Ag is released from nano-Ag-containing paints [50]. Several studies have investigated release from consumer products during use.…”

Section: Release and Alteration Of Enmmentioning

confidence: 99%

Potential scenarios for nanomaterial release and subsequent alteration in the environment

Nowack¹,

Ranville²,

Diamond³

et al. 2011

Enviro Toxic and Chemistry

518

353

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Abstract-The risks associated with exposure to engineered nanomaterials (ENM) will be determined in part by the processes that control their environmental fate and transformation. These processes act not only on ENM that might be released directly into the environment, but more importantly also on ENM in consumer products and those that have been released from the product. The environmental fate and transformation are likely to differ significantly for each of these cases. The ENM released from actual direct use or from nanomaterial-containing products are much more relevant for ecotoxicological studies and risk assessment than pristine ENM. Released ENM may have a greater or lesser environmental impact than the starting materials, depending on the transformation reactions and the material. Almost nothing is known about the environmental behavior and the effects of released and transformed ENM, although these are the materials that are actually present in the environment. Further research is needed to determine whether the release and transformation processes result in a similar or more diverse set of ENM and ultimately how this affects environmental behavior. This article addresses these questions, using four hypothetical case studies that cover a wide range of ENM, their direct use or product applications, and their likely fate in the environment. Furthermore, a more definitive classification scheme for ENM should be adopted that reflects their surface condition, which is a result of both industrial and environmental processes acting on the ENM. The authors conclude that it is not possible to assess the risks associated with the use of ENM by investigating only the pristine form of the ENM, without considering alterations and transformation processes. Environ. Toxicol. Chem. 2012;31:50-59. # 2011 SETAC

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“…Metal and metal oxide NPs have been introduced in many products with many different purposes. For example, they have been used in consumer products such as sunscreens and cosmetics (ZnO and TiO 2 ) [11,12], detergents and antibacterials (Ag) [13][14][15][16][17], paints (TiO 2 and Ag) [18,19], printer inks (Ag and Au) [20], and textiles (Ag) [13,21]. The applications of NPs also include electronics, medicine, chemistry, catalysis, and fuel additives [22].…”

Section: Sources Of Metal-based Nps In Soilmentioning

confidence: 99%

Metal‐based nanoparticles in soil: Fate, behavior, and effects on soil invertebrates

Tourinho

Gestel²,

Lofts

et al. 2012

Enviro Toxic and Chemistry

383

229

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Abstract-Metal-based nanoparticles (NPs) (e.g., silver, zinc oxide, titanium dioxide, iron oxide) are being widely used in the nanotechnology industry. Because of the release of particles from NP-containing products, it is likely that NPs will enter the soil compartment, especially through land application of sewage sludge derived from wastewater treatment. This review presents an overview of the literature dealing with the fate and effects of metal-based NPs in soil. In the environment, the characteristics of NPs (e.g., size, shape, surface charge) and soil (e.g., pH, ionic strength, organic matter, and clay content) will affect physical and chemical processes, resulting in NP dissolution, agglomeration, and aggregation. The behavior of NPs in soil will control their mobility and their bioavailability to soil organisms. Consequently, exposure characterization in ecotoxicological studies should obtain as much information as possible about dissolution, agglomeration, and aggregation processes. Comparing existing studies is a challenging task, because no standards exist for toxicity tests with NPs. In many cases, the reporting of associated characterization data is sparse, or missing, making it impossible to interpret and explain observed differences in results among studies. Environ. Toxicol. Chem.

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Release of silver nanoparticles from outdoor facades

Cited by 476 publications

References 24 publications

Particle Coating-Dependent Interaction of Molecular Weight Fractionated Natural Organic Matter: Impacts on the Aggregation of Silver Nanoparticles

Particle Coating-Dependent Interaction of Molecular Weight Fractionated Natural Organic Matter: Impacts on the Aggregation of Silver Nanoparticles

Potential scenarios for nanomaterial release and subsequent alteration in the environment

Metal‐based nanoparticles in soil: Fate, behavior, and effects on soil invertebrates

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