Laser Mass Spectrometric Analysis of Organic Atmospheric Aerosols. 2. Elucidation of Urban Air Pollution Processes

Autor:	Thomas D. Bucheli, Renato Zenobi, Olivier P. Haefliger
Rok vydání:	2000
Předmět:	chemistry.chemical_classification Pollutant Air pollution Environmental engineering Exhaust gas General Chemistry medicine.disease_cause Mass spectrometry Aerosol Diesel fuel Hydrocarbon chemistry Environmental chemistry medicine Environmental Chemistry Environmental science Air quality index
Zdroj:	Environmental Science & Technology. 34:2184-2189
ISSN:	1520-5851 0013-936X
DOI:	10.1021/es991123q
Popis:	The dynamic behavior of aerosol-bound polycyclic aromatic hydrocarbons (PAHs) and other polycyclic aromatic compounds (PACs) in urban air was studied over the course of several whole days, both next to a street with heavy traffic and in a city partk. Two-step laser mass spectrometry, a highly sensitive and selective technique, allowed measurements with 15 min time resolution. Large variations in particle concentration and chemical composition were observed, reflecting the contributions from diesel trucks and gasoline-powered cars to urban aerosols. These sources were clearly identified using specific mass spectral patterns. Photochemically induced decay of oxygenated polycyclic aromatic hydrocarbons (OPAHs) was observed to occur within only a few hours. Rapid speciation of aerosol-bound organic carbon is now possible to complement data on routinely monitored atmospheric pollutants. (A)
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::56c20431f4b380887988eb8ea259a392 https://doi.org/10.1021/es991123q Zobrazit plný text záznamu