Aggregation and Deposition of Engineered Nanomaterials in Aquatic Environments: Role of Physicochemical Interactions

Petosa, Adamo Riccardo; Jaisi, Deb P.; Quevedo, Iván R.; Elimelech, Menachem; Tufenkji, Nathalie

doi:10.1021/es100598h

Cited by 1,026 publications

(884 citation statements)

References 140 publications

Supporting

Mentioning

830

Contrasting

Unclassified

Order By: Relevance

“…Because natural organic matter (NOM) is a ubiquitous constituent of natural waters, these changes in the surface properties of PW-ENM and ET-ENM by NOM should be significant, for example, because they affect agglomeration of particles [1,41,42].…”

Section: Nanoparticle Releasementioning

confidence: 99%

“…In certain cases, another substance with greater affinity for the surface sites of the adsorbent may interact with the surface and promote desorption of the originally adsorbed substances, followed by adsorption of the new substance. Moreover, the particle itself may undergo deposition (different from sedimentation) onto a collector and experience immobilization when attached to the external surface [1]. Desorption processes will strongly affect the coatings of the PM-ENM, especially if only weakly bound to the surface.…”

Section: Nanoparticle Releasementioning

confidence: 99%

“…These processes will determine exposure levels and toxicity of ENM [1][2][3][4]. The specific processes that must be considered are not unique to nanomaterials, but the responses of ENM to these processes are likely to differ considerably from those of chemical contaminants historically considered in risk assessments.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Potential scenarios for nanomaterial release and subsequent alteration in the environment

Nowack¹,

Ranville²,

Diamond³

et al. 2011

Enviro Toxic and Chemistry

522

353

View full text Add to dashboard Cite

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

show abstract

Section: Nanoparticle Releasementioning

confidence: 99%

Section: Nanoparticle Releasementioning

confidence: 99%

See 1 more Smart Citation

Potential scenarios for nanomaterial release and subsequent alteration in the environment

Nowack¹,

Ranville²,

Diamond³

et al. 2011

Enviro Toxic and Chemistry

522

353

View full text Add to dashboard Cite

show abstract

“…A value of ATiO2-H2O-silica = 1.4×10 -20 J was chosen for the Hamaker constant of the nTiO2-water-silica system (Butt et al, 2005, Petosa et al, 2010. Hamaker constant for nTiO2-water-Fe oxyhydroxides system was determined using the method described by Hiemenz et al (1997), i.e., for the interactions of two dissimilar materials (1 and 2) via a third media (3), the Hamaker constant can be estimated in terms of Hamaker constant of each material (Appendix 2):…”

Section: Ntio2 Attachment To Sand At Various Ha Concentrationsmentioning

confidence: 99%

Stability of nTiO 2 particles and their attachment to sand: Effects of humic acid at different pH

Cheng

2016

Science of The Total Environment

View full text Add to dashboard Cite

Influence of humic acid (HA) on stability and attachment of nTiO2 particles to sand was investigated. Results showed that HA can either promote or hinder nTiO2 stability, depending on pH and HA concentration. HA can either enhance or reduce nTiO2 attachment to Fe oxyhydroxide coating at pH 5, depending on HA concentration.Results further showed that at pH 5, Fe oxyhydroxide coating reduced nTiO2 attachment to sand in the absence of HA but increased nTiO2 attachment in the presence of low concentration of HA. Derjaguin-Landau-Verwey-Overbeek (DLVO) theory was invoked to analyze particle-to-particle and particle-to-sand interactions in order to elucidate the roles of pH, HA, quartz, and Fe coating in controlling nTiO2 stability and attachment. Overall, this study showed that changes in zeta potential of nTiO2 and Fe coating due to pH changes and/or HA adsorption are the key factors that influence stability and attachment of nTiO2.iii ACKNOWLEDGEMENTS

show abstract

“…Such processes include, for example, surface roughness of soil grain collectors, interfacial dynamics of double-layer in particle-particle and particlecollector interactions, surface charge heterogeneity of nanoparticles and soil grain collectors, and many others. In addition, nanoparticles are manufactured with different properties (i.e., size, shape, and agglomeration state) which definitely influence their transport, Petosa et al (2010), Ryan and Elimelech (1996). During physicochemical filtration, the interactions between neighboring nanoparticles and between particles and medium surfaces will determine particle stability and retention during transport.…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

Numerical investigation of nanoparticles transport in anisotropic porous media

Salama

Negara

El-Amin

et al. 2015

Journal of Contaminant Hydrology

View full text Add to dashboard Cite

In this work the problem related to the transport of nanoparticles in anisotropic porous media is investigated numerically using the multipoint flux approximation. Anisotropy of porous media properties are an essential feature that exist almost everywhere in subsurface formations. In anisotropic media, the flux and the pressure gradient vectors are no longer collinear and therefore interesting patterns emerge. The transport of nanoparticles in subsurface formations is affected by several complex processes including surface charges, heterogeneity of nanoparticles and soil grain collectors, interfacial dynamics of double-layer and many others. We use the framework of the theory of filtration in this investigation. Processes like particles deposition, entrapment, as well as detachment are accounted for. From the numerical methods point of view, traditional twopoint flux finite difference approximation cannot handle anisotropy of media properties. Therefore, in this work we use the multipoint flux approximation (MPFA). In this technique, the flux components are affected by more neighboring points as opposed to the mere two points that are usually used in traditional finite volume methods. We also use the experimenting pressure field approach which automatically constructs the global system of equations by solving multitude of local problems. This approach facilitates to a large extent the construction of the global system. A set of numerical examples is considered involving two-dimensional rectangular domain. A source of nanoparticles is inserted in the middle of the anisotropic layer. We investigate the effects of both anisotropy angle and anisotropy ratio on the transport of nanoparticles in saturated porous media. It is found that the concentration plume and porosity contours follow closely the principal direction of anisotropy of permeability of the central domain.

show abstract

Aggregation and Deposition of Engineered Nanomaterials in Aquatic Environments: Role of Physicochemical Interactions

Cited by 1,026 publications

References 140 publications

Potential scenarios for nanomaterial release and subsequent alteration in the environment

Potential scenarios for nanomaterial release and subsequent alteration in the environment

Stability of nTiO 2 particles and their attachment to sand: Effects of humic acid at different pH

Numerical investigation of nanoparticles transport in anisotropic porous media

Contact Info

Product

Resources

About