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Titolo:
Identification, abundance and origin of atmospheric organic particulate matter in a Portuguese rural area
Autore:
Pio, CA; Alves, CA; Duarte, AC;
Indirizzi:
Univ Aveiro, Dept Environm & Planning, P-3810193 Aveiro, Portugal Univ Aveiro Aveiro Portugal P-3810193 anning, P-3810193 Aveiro, Portugal Univ Aveiro, Dept Chem, P-3810193 Aveiro, Portugal Univ Aveiro Aveiro Portugal P-3810193 t Chem, P-3810193 Aveiro, Portugal
Titolo Testata:
ATMOSPHERIC ENVIRONMENT
fascicolo: 8, volume: 35, anno: 2001,
pagine: 1365 - 1375
SICI:
1352-2310(2001)35:8<1365:IAAOOA>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
GAS-CHROMATOGRAPHIC ANALYSIS; ALPHA-PINENE; MOLECULAR MARKERS; BETA-PINENE; AEROSOLS; PARTICLES; PRODUCTS; AIR; OH; PHOTOOXIDATION;
Keywords:
particulate matter; carbon; organic compounds; source assignment;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Physical, Chemical & Earth Sciences
Citazioni:
47
Recensione:
Indirizzi per estratti:
Indirizzo: Pio, CA Univ Aveiro, Dept Environm & Planning, Campus Santiago, P-3810193 Aveiro, Portugal Univ Aveiro Campus Santiago Aveiro Portugal P-3810193 o, Portugal
Citazione:
C.A. Pio et al., "Identification, abundance and origin of atmospheric organic particulate matter in a Portuguese rural area", ATMOS ENVIR, 35(8), 2001, pp. 1365-1375

Abstract

Respirable suspended particles high-volume samples were collected from a coastal-rural site in the centre of Portugal in August 1997 and their solvent-extractable organic compounds were subjected to characterisation by gas chromatography-mass spectrometry. Particles were also analysed by a thermal/optical technique in order to determine their black and organic carbon content. The total lipid extract yields ranged from 20 to 63 mu gm(-3), containing mainly aliphatic hydrocarbons such as n-alkanes, acids, alcohols, aldehydes, ketones and polycyclic aromatic hydrocarbons. The higher input of vascular plant wax components was demonstrated by the distribution patterns ofthe n-alkanes, n-alkanoic acids and n-alkanols homologous series, with C-max at C-29, C-22/C-24 and C-30, respectively. The CPI values for these series were in the range 1.8-9.7, being indicative of recent biogenic input from microbial lipid residues and flora epicuticular components. Specific natural constituents (e.g, phytosterols, terpenes, etc.) were identified as molecular markers. Some oxidation products from volatile organic precursors were also present in the aerosols. In addition, all samples had a component of petroleum hydrocarbons representing urban and vehicular emissions probably transported from the nearest cities and from the motorway in the vicinity. This data set could be used to make a mass balance with organic carbon, organic extracts and elutable matter, permitting also the comparison with lipid signatures observed for other regions. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/09/18 alle ore 08:45:46