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Titolo:
VARIATION OF PARTICLE NUMBER AND MASS CONCENTRATION IN VARIOUS SIZE RANGES OF AMBIENT AEROSOLS IN EASTERN GERMANY
Autore:
TUCH T; BRAND P; WICHMANN HE; HEYDER J;
Indirizzi:
GSF,NATL RES CTR ENVIRONM & HLTH,INST INHALAT BIOL D-85758 OBERSCHLEISSHEIM GERMANY GSF,NATL RES CTR ENVIRONM & HLTH,INST INHALAT BIOL D-85758 OBERSCHLEISSHEIM GERMANY NATL RES CTR ENVIRONM & HLTH,INST EPIDEMIOL D-85758 OBERSCHLEISSHEIM GERMANY
Titolo Testata:
Atmospheric environment
fascicolo: 24, volume: 31, anno: 1997,
pagine: 4193 - 4197
SICI:
1352-2310(1997)31:24<4193:VOPNAM>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
PARTICULATE AIR-POLLUTION; ULTRAFINE PARTICLES; MORTALITY; ERFURT;
Keywords:
AMBIENT AEROSOL; PARTICLE NUMBER DISTRIBUTION; PARTICLE MASS DISTRIBUTION; ULTRAFINE PARTICLES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
12
Recensione:
Indirizzi per estratti:
Citazione:
T. Tuch et al., "VARIATION OF PARTICLE NUMBER AND MASS CONCENTRATION IN VARIOUS SIZE RANGES OF AMBIENT AEROSOLS IN EASTERN GERMANY", Atmospheric environment, 31(24), 1997, pp. 4193-4197

Abstract

There is an ongoing debate on the question which size fraction of particles in ambient air may be responsible for short-term responses of the respiratory system as observed in several epidemiological studies. However, the available data on ambient particle concentrations in various size ranges are not sufficient to answer this question. Therefore,on 180 days during the winter 1991/92 daily mean size distributions of ambient particles were determined in Erfurt, a city in Eastern Germany. In the range 0.01-0.3 mu m particles were classified by an electrical mobility analyzer and in the range 0.1-2.5 mu m by an optical particle counter. From the derived size distributions, number and mass concentrations were calculated. The mean number concentration over this period of time was governed by particles smaller than 0.1 mu m (72%), whereas the mean mass concentration was governed by particles in the size range 0.1-0.5 mu m (83%). The contribution of particles larger than0.5 mu m to the overall number concentration was negligible and so was the contribution of particles smaller than 0.1 mu m to the overall mass concentration. Furthermore, total number and mass concentrations in the range 0.01-2.5 mu m were poorly correlated. The results suggest that particles larger than 2.5 mu m (or even larger than 0.5 mu m) arerare in the European urban environment so that the inhalation of these particles is probably not relevant for human health. Since particle number and mass concentrations can be considered poorly correlated variables, more insight into health-related aspects of particulate air pollution will be obtained by correlating respiratory responses with mass and number concentrations of ambient particles below 0.5 mu m. (C) 1997 Elsevier Science Ltd.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 06/04/20 alle ore 05:14:43