Ambient and laboratory observations of organic ammonium salts in PM₁

dc.contributor.authorSchlag, Patrick
dc.contributor.authorRubach, Florian
dc.contributor.authorMentel, Thomas F.
dc.contributor.authorReimer, David Thomas
dc.contributor.authorCanonaco, Francesco
dc.contributor.authorHenzing, Bas
dc.contributor.authorMoerman, M.
dc.contributor.authorOtjes, R.
dc.contributor.authorPrévôt, André S.H.
dc.contributor.authorRohrer, Franz
dc.contributor.authorRosati, B.
dc.contributor.authorTillmann, Ralf
dc.contributor.authorWeingartner, Ernest
dc.contributor.authorKiendler-Scharr, Astrid
dc.date.accessioned2024-01-17T14:25:15Z
dc.date.available2024-01-17T14:25:15Z
dc.date.issued2017
dc.description.abstractAmbient measurements of PM<sub>1</sub>aerosol chemical composition at Cabauw, the Netherlands, implicate higher ammonium concentrations than explained by the formation of inorganic ammonium salts. This additional particulate ammonium is called excess ammonium (<italic>e</italic><sub>NH4</sub>). Height profiles over the Cabauw Experimental Site for Atmospheric Research (CESAR) tower, of combined ground based and airborne aerosol mass spectrometric (AMS) measurements on a Zeppelin airship show higher concentrations of<italic>e</italic><sub>NH4</sub>at higher altitudes compared to the ground. Through flights across the Netherlands, the Zeppelin based measurements furthermore substantiate<italic>e</italic><sub>NH4</sub>as a regional phenomenon in the planetary boundary layer. The excess ammonium correlates with mass spectral signatures of (di-)carboxylic acids, making a heterogeneous acid–base reaction the likely process of NH<sub>3</sub>uptake. We show that this excess ammonium was neutralized by the organic fraction forming particulate organic ammonium salts. We discuss the significance of such organic ammonium salts for atmospheric aerosols and suggest that NH<sub>3</sub>emission control will have benefits for particulate matter control beyond the reduction of inorganic ammonium salts.
dc.identifier.doi10.1039/c7fd00027h
dc.identifier.issn1359-6640
dc.identifier.issn1364-5498
dc.identifier.urihttps://irf.fhnw.ch/handle/11654/43706
dc.issue200
dc.language.isoen
dc.publisherRoyal Society of Chemistry
dc.relation.ispartofFaraday Discussions
dc.spatialLondon
dc.subject.ddc620 - Ingenieurwissenschaften und Maschinenbau
dc.titleAmbient and laboratory observations of organic ammonium salts in PM₁
dc.type01A - Beitrag in wissenschaftlicher Zeitschrift
dc.volume2017
dspace.entity.typePublication
fhnw.InventedHereYes
fhnw.ReviewTypeAnonymous ex ante peer review of a complete publication
fhnw.affiliation.hochschuleHochschule für Technikde_CH
fhnw.affiliation.institutlnstitut für Sensorik und Elektronikde_CH
fhnw.openAccessCategoryClosed
fhnw.pagination331-351
fhnw.publicationStatePublished
relation.isAuthorOfPublication05dd9a19-7a24-4325-805a-2d121483b168
relation.isAuthorOfPublication.latestForDiscovery05dd9a19-7a24-4325-805a-2d121483b168
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