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Titolo:
Ozone and limonene in indoor air: A source of submicron particle exposure
Autore:
Wainman, T; Zhang, JF; Weschler, CJ; Lioy, PJ;
Indirizzi:
Univ Med & Dent New Jersey, Robert Wood Johnson Med Sch, Environm & Occupat Hlth Sci Inst, Piscataway, NJ 08854 USA Univ Med & Dent New Jersey Piscataway NJ USA 08854 scataway, NJ 08854 USA Telcordia Technol, Red Bank, NJ USA Telcordia Technol Red Bank NJ USATelcordia Technol, Red Bank, NJ USA
Titolo Testata:
ENVIRONMENTAL HEALTH PERSPECTIVES
fascicolo: 12, volume: 108, anno: 2000,
pagine: 1139 - 1145
SICI:
0091-6765(200012)108:12<1139:OALIIA>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
VOLATILE ORGANIC-COMPOUNDS; SOUTHWEST MEXICO-CITY; BETA-PINENE; FINE PARTICLES; ATMOSPHERIC OXIDATION; BIOGENIC HYDROCARBONS; SOURCE APPORTIONMENT; SOUTHERN CALIFORNIA; ALPHA-PINENE; PARTICULATE;
Keywords:
indoor air chemistry; limonene; ozone; particulate matter; secondary organic aerosol;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
53
Recensione:
Indirizzi per estratti:
Indirizzo: Zhang, JF Univ Med & Dent New Jersey, Robert Wood Johnson Med Sch, Environm & Occupat Hlth Sci Inst, 170 Frelinghuysen Rd, Piscataway, NJ 08854 USA Univ Med & Dent New Jersey 170 Frelinghuysen Rd Piscataway NJ USA 08854
Citazione:
T. Wainman et al., "Ozone and limonene in indoor air: A source of submicron particle exposure", ENVIR H PER, 108(12), 2000, pp. 1139-1145

Abstract

Little information currently exists regarding the occurrence of secondary organic aerosol formation in indoor air. Smog chamber studies have demonstrated that high aerosol yields result from the reaction of ozone with terpenes, both of which commonly occur in indoor air. However, smog chambers are typically static systems, whereas indoor environments are dynamic. We conducted a series of experiments to investigate the potential for secondary aerosol in indoor air as a result of the reaction of ozone with d-limonene, a compound commonly used in air fresheners. A dynamic chamber design was usedin which a smaller chamber was nested inside a larger one, with air exchange occurring between the two. The inner chamber was used to represent a model indoor environment and was operated at an air exchange rate below 1 exchange/hr, while the outer chamber was operated at a high air exchange rate of approximately 45 exchanges/hr. Limonene was introduced into the inner chamber either by the evaporation of reagent-grade d-limonene or by inserting a lemon-scented, solid air freshener. A series of ozone injections were made into the inner chamber during the course of each experiment, and an optical particle counter was used to measure the particle concentration. Measurable particle formation and growth occurred almost exclusively in the 0.1-0.2 mum and 0.2-0.3 mum size fractions in all of the experiments. Particle formation in the 0.1-0.2 mum size range occurred as soon as ozone was introduced, but the formation of particles in the 0.2-0.3 mum size range did not occur until at least the second ozone injection occurred. The results of this study show a clear potential for significant particle concentrations to be produced in indoor environments as a result of secondary particle formation via the ozone-limonene reaction. Because people spend the majority of their time indoors, secondary particles formed in indoor environments may make a significant contribution to overall particle exposure. This study provides data for assessing the impact of outdoor ozone on indoor particles. This is important to determine the efficacy of the mass-based particulate matter standards in protecting public heath because the indoor secondary particles can vary coincidently with the variations of outdoor fine particles in summer.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/18 alle ore 01:14:14