Addressing the complexity of water chemistry in environmental fate modeling for engineered nanoparticles

Sani-Kast, Nicole; Scheringer, Martin; Slomberg, Danielle L.; Labille, Jérôme; Praetorius, Antonia; Ollivier, Patrick; Hungerbühler, Konrad

doi:10.1016/j.scitotenv.2014.12.025

Cited by 71 publications

(68 citation statements)

References 39 publications

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“…47 The range in previous TiO 2 PECs is quite wide ( Figure 5C). 37,[47][48][49]52,61,73,74,144 nanoFate results fall within this range, except in suspended sediment and biosolids-agricultural soils where our results tend to be somewhat higher, due to our more realistic assumption that biosolids are only applied to a fraction of agricultural lands. For ZnO, our predictions fall within previous predicted ranges except for suspended sediment, where nanoFate predicts much higher concentrations, and somewhat lower than previous predictions in the freshwater column and in marine sediment ( Figure 5D).…”

Section: Significancesupporting

confidence: 66%

Assessing the Risk of Engineered Nanomaterials in the Environment: Development and Application of the nanoFate Model

Garner

Suh

Keller

2017

Environ. Sci. Technol.

213

166

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We developed a dynamic multimedia fate and transport model (nanoFate) to predict the time-dependent accumulation of metallic engineered nanomaterials (ENMs) across environmental media. nanoFate considers a wider range of processes and environmental subcompartments than most previous models and considers ENM releases to compartments (e.g., urban, agriculture) in a manner that reflects their different patterns of use and disposal. As an example, we simulated ten years of release of nano CeO 2 , CuO, TiO 2 , and ZnO in the San Francisco Bay area. Results show that even soluble metal oxide ENMs may accumulate as nanoparticles in the environment in sufficient concentrations to exceed the minimum toxic threshold in freshwater and some soils, though this is more likely with high-production ENMs such as TiO 2 and ZnO. Fluctuations in weather and release scenario may lead to circumstances where predicted ENM concentrations approach acute toxic concentrations. The fate of these ENMs is to mostly remain either aggregated or dissolved in agricultural lands receiving biosolids and in freshwater or marine sediments. Comparison to previous studies indicates the importance of some key model aspects including climatic and temporal variations, how ENMs may be released into the environment, and the effect of compartment composition on predicted concentrations.

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Section: Significancesupporting

confidence: 66%

Assessing the Risk of Engineered Nanomaterials in the Environment: Development and Application of the nanoFate Model

Garner

Suh

Keller

2017

Environ. Sci. Technol.

213

166

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“…Fate processes were largely ignored in the earlier studies (Boxall et al 2007). Bottom-up approaches (Mueller and Nowack 2008) are more fully life-cycle based, and recent fate and behavior models include more detailed processes such as dissolution, sedimentation, and aggregation, often linked to stream flow and other physical processes (Praetorius et al 2012;Liu and Cohen 2014;Sun et al 2014;Dale et al 2015;Sani-Kast et al 2015;Ellis et al 2016Ellis et al , 2018. Despite these advances, many uncertainties and deficiencies remain.…”

Section: Sulfidation and Redox Behaviormentioning

confidence: 99%

Nanomaterials in the environment: Behavior, fate, bioavailability, and effects—An updated review

Lead

Batley

Alvarez

et al. 2018

Enviro Toxic and Chemistry

455

250

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The present review covers developments in studies of nanomaterials (NMs) in the environment since our much cited review in 2008. We discuss novel insights into fate and behavior, metrology, transformations, bioavailability, toxicity mechanisms, and environmental impacts, with a focus on terrestrial and aquatic systems. Overall, the findings were that: 1) despite substantial developments, critical gaps remain, in large part due to the lack of analytical, modeling, and field capabilities, and also due to the breadth and complexity of the area; 2) a key knowledge gap is the lack of data on environmental concentrations and dosimetry generally; 3) substantial evidence shows that there are nanospecific effects (different from the effects of both ions and larger particles) on the environment in terms of fate, bioavailability, and toxicity, but this is not consistent for all NMs, species, and relevant processes; 4) a paradigm is emerging that NMs are less toxic than equivalent dissolved materials but more toxic than the corresponding bulk materials; and 5) translation of incompletely understood science into regulation and policy continues to be challenging. There is a developing consensus that NMs may pose a relatively low environmental risk, but because of uncertainty and lack of data in many areas, definitive conclusions cannot be drawn. In addition, this emerging consensus will likely change rapidly with qualitative changes in the technology and increased future discharges.

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“…It is very likely that the large amount of production of ENMs will lead to their release into the environment through production, application, and disposal processes [1,22,23]. For example, titanium dioxide nanoparticles (TiO 2 NPs) were modeled and predicted to be discharged to the wastewater treatment plant, landfill and other environments [4,17,24]. The application of ENMs has raised concern over the safety of these materials to human health and the ecosystem [2,14,17].…”

Section: Nanoparticlesmentioning

confidence: 99%

“…A model of NPs (TiO 2 ) in the Lower Rhône River in France indicated that the heteroaggregation between NPs and suspended particulate matter was affected by the complexity of water chemistry. It was indicated that a reliable prediction of the fate of NPs is feasible if the water characteristic in regions near the emission sources is favorable for heteroaggregation [24]. In other words, the heteroaggregation and deposition of NPs to the sediment layer can substantially reduce the uncertainty in the prediction of the fate and transport of NPs.…”

Section: Application Of a Heteroaggregation Modelmentioning

confidence: 99%

Heteroaggregation of nanoparticles with biocolloids and geocolloids

Wang

Adeleye

Huang

et al. 2015

Advances in Colloid and Interface Science

166

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The application of nanoparticles has raised concern over the safety of these materials to human health and the ecosystem. After release into an aquatic environment, nanoparticles are likely to experience heteroaggregation with biocolloids, geocolloids, natural organic matter (NOM) and other types of nanoparticles. Heteroaggregation is of vital importance for determining the fate and transport of nanoparticles in aqueous phase and sediments. In this article, we review the typical cases of heteroaggregation between nanoparticles and biocolloids and/or geocolloids, mechanisms, modeling, and important indicators used to determine heteroaggregation in aqueous phase. The major mechanisms of heteroaggregation include electric force, bridging, hydrogen bonding, and chemical bonding. The modeling of heteroaggregation typically considers DLVO, X-DLVO, and fractal dimension. The major indicators for studying heteroaggregation of nanoparticles include surface charge measurements, size measurements, observation of morphology of particles and aggregates, and heteroaggregation rate determination. In the end, we summarize the research challenges and perspective for the heteroaggregation of nanoparticles, such as the determination of α hetero values and heteroaggregation rates; more accurate analytical methods instead of DLS for heteroaggregation measurements; sensitive analytical techniques to measure low concentrations of nanoparticles in heteroaggregation systems; appropriate characterization of NOM at the molecular level to understand the structures and fractionation of NOM; effects of different types, concentrations, and fractions of NOM on the heteroaggregation of nanoparticles; the quantitative adsorption and desorption of NOM onto the surface of nanoparticles and heteroaggregates; and a better understanding of the fundamental mechanisms and modeling of heteroaggregation in natural water which is a complex system containing NOM, nanoparticles, biocolloids and geocolloids.

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Addressing the complexity of water chemistry in environmental fate modeling for engineered nanoparticles

Cited by 71 publications

References 39 publications

Assessing the Risk of Engineered Nanomaterials in the Environment: Development and Application of the nanoFate Model

Assessing the Risk of Engineered Nanomaterials in the Environment: Development and Application of the nanoFate Model

Nanomaterials in the environment: Behavior, fate, bioavailability, and effects—An updated review

Heteroaggregation of nanoparticles with biocolloids and geocolloids

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