Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/8007| DC Field | Value | Language |
|---|---|---|
| dc.contributor.authorall | Sagnotti, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia | en |
| dc.contributor.authorall | Winkler, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia | en |
| dc.date.accessioned | 2012-07-30T09:55:44Z | en |
| dc.date.available | 2012-07-30T09:55:44Z | en |
| dc.date.issued | 2012-11 | en |
| dc.identifier.uri | http://hdl.handle.net/2122/8007 | en |
| dc.description.abstract | The magnetic properties of traffic-related airborne particulate matter (PM) in the city of Rome, Italy, have been previously analyzed and interpreted as suitable proxies to discriminate between different vehicular sources. In this study, we carried out a new set of measurements and analyses specifically devoted to the identification and evaluation of the contribution of ultrafine superparamagnetic (SP) particles to the overall magnetic assemblage of traffic-related PM in Rome. In particular, the presence and the concentration of SP particles have been estimated on powders collected from disk brakes and gasoline exhaust pipes of circulating vehicles and from Quercus ilex leaves grown along high-traffic roads, measuring their hysteresis parameters in a range of temperatures from 293 K to 10 K and measuring the time decay of their saturation remanent magnetization (MRS) at room temperature. The SP fraction contributes for the 10-15% to the overall room temperature MRS and causes the observed changes in the hysteresis properties measured upon cooling down to 10 K. In all the analyzed samples the SP fraction is associated to a generally prevailing population of larger ferrimagnetic multidomain (MD) particles and we suppose that in traffic-related PM the SP fraction mainly occurs as coating of MD particles and originated by localized stress in the oxidized outer shell surrounding the unoxidized core of magnetite-like grains. Under this hypothesis, the estimate of SP content in traffic-related PM cannot be considered a robust proxy to estimate the overall concentration of nanometric particles. | en |
| dc.language.iso | English | en |
| dc.publisher.name | Elsevier Science Limited | en |
| dc.relation.ispartof | Atmospheric environment | en |
| dc.relation.ispartofseries | /59 (2012) | en |
| dc.subject | Particulate Matter | en |
| dc.subject | Air pollution | en |
| dc.subject | Environmental magnetism | en |
| dc.subject | Superparamagnetic particles | en |
| dc.subject | Hysteresis properties | en |
| dc.title | On the magnetic characterization and quantification of the superparamagnetic fraction of traffic-related urban airborne PM in Rome, Italy | en |
| dc.type | article | en |
| dc.description.status | Published | en |
| dc.type.QualityControl | Peer-reviewed | en |
| dc.description.pagenumber | 131-140 | en |
| dc.subject.INGV | 04. Solid Earth::04.05. Geomagnetism::04.05.09. Environmental magnetism | en |
| dc.identifier.doi | 10.1016/j.atmosenv.2012.04.058 | en |
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Identifying reversible and irreversible magnetization changes in prototype patterned media using first- and secondorder reversal curves. J. Appl. Phys. 103 (7), 07C518. doi:10.1063/1.2837888. Worm, H.-U., Jackson, M., 1999. The superparamagnetism of Yucca Mountain Tuff. J. Geophys. Res. 104, 25415e25425. Worm, H.-U., 1998. On the superparamagnetic-stable single domain transition for magnetite, and frequency dependence of susceptibility. Geophys. J. Int. 133, 201e206. Zergenyi, R.S., Hirt, A.M., Zimmermann, S., Dobson, J.P., Lowrie, W., 2000. Lowtemperature magnetic behavior of ferrihydrite. J. Geophys. Res. 105 (B4), 8297e8303. doi:10.1029/1999JB900315. | en |
| dc.description.obiettivoSpecifico | 2.2. Laboratorio di paleomagnetismo | en |
| dc.description.obiettivoSpecifico | 3.8. Geofisica per l'ambiente | en |
| dc.description.journalType | JCR Journal | en |
| dc.description.fulltext | restricted | en |
| dc.relation.issn | 1352-2310 | en |
| dc.relation.eissn | 1873-2844 | en |
| dc.contributor.author | Sagnotti, L. | en |
| dc.contributor.author | Winkler, A. | en |
| dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia | en |
| dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia | en |
| item.openairetype | article | - |
| item.cerifentitytype | Publications | - |
| item.languageiso639-1 | en | - |
| item.grantfulltext | restricted | - |
| item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
| item.fulltext | With Fulltext | - |
| crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia | - |
| crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia | - |
| crisitem.author.orcid | 0000-0003-3944-201X | - |
| crisitem.author.orcid | 0000-0002-0653-0059 | - |
| crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| crisitem.classification.parent | 04. Solid Earth | - |
| crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| Appears in Collections: | Article published / in press | |
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| sagnotti winkler 2012 AE 59 131-140.pdf | 1.47 MB | Adobe PDF |
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