Beschreibung
The aggregation behavior of engineered nanoparticles (ENPs) in various media has been studied extensively over the past decade. However, most of these studies focus on homoaggregation, a process expected to be less relevant for ENPs in natural systems, where they are largely outnumbered by naturally occurring suspending particulate matter (SPM). Information on heteroaggregation between ENPs and SPM is therefore needed more urgently. Due to the increased complexity of a heteroaggregating system, methods to study heteroaggregation and derive usable data for fate assessment of ENPs are still in their infancy and experimental data on heteroaggregation is scarce. In this contribution we explore the possibility of taking advantage of the existing large dataset on homoaggregation of ENPs to derive first estimates of their heteroaggregation behavior. To this aim, we carefully assessed the aggregation mechanisms and interaction forces acting between aggregating particles. The effect of ENPs and SPM size and composition, as well as the influence of pH, ionic strength and content of natural organic matter on the interaction potential between homo- and heteroaggregating particles was investigated. As a result we identified a set of conditions, under which the ENPs and SPM are “similar” enough to infer heteroaggregation behavior from homoaggregation data.| Zeitraum | 10 Nov. 2016 |
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| Ereignistitel | 5th Sustainable Nanotechnology Organization Conference |
| Veranstaltungstyp | Konferenz |
| Ort | Orlando, USA / Vereinigte StaatenAuf Karte anzeigen |