Journal article
Silicon is a Frequent Component of Atmospheric Nanoparticles
Environmental science & technology, Vol.48(19), pp.11137-11145
10/07/2014
DOI: 10.1021/es5026933
PMID: 25203137
Abstract
Nanoparticles are the largest fraction of aerosol loading by number. Knowledge of the chemical components present in nanoparticulate matter is needed to understand nanoparticle health and climatic impacts. In this work, we present field measurements using the Nano Aerosol Mass Spectrometer (NAMS), which provides quantitative elemental composition of nanoparticles around 20 nm diameter. NAMS measurements indicate that the element silicon (Si) is a frequent component of nanoparticles. Nanoparticulate Si is most abundant in locations heavily impacted by anthropogenic activities. Wind direction correlations suggest the sources of Si are diffuse, and diurnal trends suggest nanoparticulate Si may result from photochemical processing of gas phase Si-containing compounds, such as cyclic siloxanes. Atmospheric modeling of oxidized cyclic siloxanes is consistent with a diffuse photochemical source of aerosol Si. More broadly, these observations indicate a previously overlooked anthropogenic source of nanoaerosol mass. Further investigation is needed to fully resolve its atmospheric role.
Details
- Title: Subtitle
- Silicon is a Frequent Component of Atmospheric Nanoparticles
- Creators
- Bryan R Bzdek - University of DelawareAndrew J Horan - University of DelawareM. Ross Pennington - University of DelawareNathan J Janechek - University of IowaJaemeen Baek - University of IowaCharles O Stanier - University of IowaMurray V Johnston - University of Delaware
- Resource Type
- Journal article
- Publication Details
- Environmental science & technology, Vol.48(19), pp.11137-11145
- Publisher
- American Chemical Society
- DOI
- 10.1021/es5026933
- PMID
- 25203137
- ISSN
- 0013-936X
- eISSN
- 1520-5851
- Grant note
- DOI: 10.13039/501100001589, name: Environmental Protection Agency, award: FP-91731501; DOI: 10.13039/100000159, name: Division of Atmospheric and Geospace Sciences, award: AGS-1205304, ATM-0748602
- Language
- English
- Date published
- 10/07/2014
- Academic Unit
- Iowa Technology Institute; Chemical and Biochemical Engineering
- Record Identifier
- 9984003473802771
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