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Titolo:
Composition of extractable organic matter of air particles from rural and urban Portuguese areas
Autore:
Alves, C; Pio, C; Duarte, A;
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: 32, volume: 35, anno: 2001,
pagine: 5485 - 5496
SICI:
1352-2310(200111)35:32<5485:COEOMO>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
GAS-CHROMATOGRAPHIC ANALYSIS; AROMATIC-HYDROCARBONS; BETA-PINENE; SOURCE RECONCILIATION; MOLECULAR MARKERS; ALPHA-PINENE; HONG-KONG; AEROSOLS; PHOTOOXIDATION; PRODUCTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Physical, Chemical & Earth Sciences
Citazioni:
47
Recensione:
Indirizzi per estratti:
Indirizzo: Pio, C Univ Aveiro, Dept Environm & Planning, Campus Santiago, P-3810193 Aveiro, Portugal Univ Aveiro Campus Santiago Aveiro Portugal P-3810193 ro, Portugal
Citazione:
C. Alves et al., "Composition of extractable organic matter of air particles from rural and urban Portuguese areas", ATMOS ENVIR, 35(32), 2001, pp. 5485-5496

Abstract

Atmospheric particulate matter (PM10) was collected simultaneously Lit three sites in the West Coast of Portugal, during an intensive campaign in August 1996. The sites were located in line with the breezes blowing from the sea. The collected aerosol was analysed in relation to black and organic carbon content. The particulate organic matter was extracted with solvents and characterised by gas chromatography and mass spectrometry (GC-MS). Most of the organic mass identified consists of alkanes. polycyclic aromatic hydrocarbons (PAH), ketones, aldehydes, alcohols and fatty acids with both biogenic and anthropogenic origin. Many photochemical products from volatile organic compounds emitted by vegetation were also detected. Biomarkers such as 6,10,14-trimethylpentadecanone, abieta-8,11,13-trien-7-one and Patchouli alcohol were observed at higher concentrations in the rural sites. Samples from the urban site present lower values of "carbon preference index" and higher concentrations of petrogenic/pyrogenic species, such as PAH. The PM10concentrations and the total organic extract measured for the more interior site were generally lower, indicating that dispersion and dry deposition into the forest canopy were more important during the transport of the air masses than aerosol production by condensation and photochemical reactions. On the contrary, The ratio between organic and black carbon was, in general, lower at sites near the coast, especially for compounds that evaporate at lower temperatures. The organic aerosol composition also seems to be strongly dependent on the meteorology. (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 24/06/18 alle ore 17:06:25