Engineered nanomaterials in rivers - Exposure scenarios for Switzerland at high spatial and temporal resolution

Gottschalk, F., Ort, C., Scholz, R. W. and Nowack, B. (2011) Engineered nanomaterials in rivers - Exposure scenarios for Switzerland at high spatial and temporal resolution. Environmental Pollution, 159 12: 3439-3445. doi:10.1016/j.envpol.2011.08.023


Author Gottschalk, F.
Ort, C.
Scholz, R. W.
Nowack, B.
Title Engineered nanomaterials in rivers - Exposure scenarios for Switzerland at high spatial and temporal resolution
Journal name Environmental Pollution   Check publisher's open access policy
ISSN 0269-7491
1873-6424
Publication date 2011-12
Sub-type Article (original research)
DOI 10.1016/j.envpol.2011.08.023
Volume 159
Issue 12
Start page 3439
End page 3445
Total pages 7
Place of publication Oxford, United Kingdom
Publisher Pergamon
Collection year 2012
Language eng
Formatted abstract
Probabilistic material flow analysis and graph theory were combined to calculate predicted environmental concentrations (PECs) of engineered nanomaterials (ENMs) in Swiss rivers: 543 river sections were used to assess the geographical variability of nano-TiO2, nano-ZnO and nano-Ag, and flow measurements over a 20-year period at 21 locations served to evaluate temporal variation. A conservative scenario assuming no ENM removal and an optimistic scenario covering complete ENM transformation/deposition were considered. ENM concentrations varied by a factor 5 due to uncertain ENM emissions (15%–85% quantiles of ENM emissions) and up to a factor of 10 due to temporal river flow variations (15%–85% quantiles of flow). The results indicate highly variable local PECs and a location- and time-dependent risk evaluation. Nano-TiO2 median PECs ranged from 11 to 1′623 ng L−1 (conservative scenario) and from 2 to 1′618 ng L−1 (optimistic scenario). The equivalent values for nano-ZnO and nano-Ag were by factors of 14 and 240 smaller.
Keyword Probabilistic material flow analysis
Graph theory
Engineered nanomaterial (ENM)
Predicted environmental concentrations (PEC) in rivers
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
Advanced Water Management Centre Publications
 
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