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Formation of polyaromatic hydrocarbon (PAH)-quinones during the gas phase reactions of PAHs with the OH radical in the atmosphere

Title
Formation of polyaromatic hydrocarbon (PAH)-quinones during the gas phase reactions of PAHs with the OH radical in the atmosphere
Authors
Lee, Ji YiLane, Douglas A.Kim, Yong Pyo
Ewha Authors
김용표
SCOPUS Author ID
김용표scopus
Issue Date
2015
Journal Title
ENVIRONMENTAL CHEMISTRY
ISSN
1448-2517JCR Link1449-8979JCR Link
Citation
vol. 12, no. 3, pp. 307 - 315
Keywords
atmospheric formationformation yeildnaphthalenephenanthrene
Publisher
CSIRO PUBLISHING
Indexed
SCIE; SCOPUS WOS scopus
Abstract
Environmental context Atmospheric quinones present a potential toxic risk to human health because of their involvement in the generation of reactive oxygen species. Gas phase reactions of naphthalene and phenanthrene with the OH radical are investigated in a laboratory reaction chamber to provide a preliminary assessment of the importance of the atmospheric formation of quinones. Abstract In light of the potential toxicity of quinones (QNs) to human health, previous studies carried out measurement of QNs in ambient air samples and from motor vehicle emissions to understand the characteristics and the sources of QNs in the atmosphere. The major compounds observed in the ambient air samples comprised two and three benzene rings and included polyaromatic hydrocarbon (PAH)-quinones (PAH-QNs) such as 1,2-naphthoquinone (1,2-NQ), 1,4-naphthoquinone (1,4-NQ), 9,10-phenanthrenequinone (9,10-PQ) and 9,10-anthraquinone (9,10-AQ). Although these PAH-QNs are found in vehicular emissions, they may also be formed by the photochemical reactions of gas phase PAHs with atmospheric oxidants. In this study, to allow an assessment of the importance of the atmospheric formation of PAH-QNs and to understand more clearly the sources of PAH-QNs in the atmosphere, the formation yields of PAH-QNs from the gas phase reactions of naphthalene and phenanthrene with the OH radical were observed in a laboratory reaction chamber. In addition, the phase distribution of the PAH-QNs was determined. For naphthoquinones (NQs), the formation yields of 1,4-NQ and 1,2-NQ were 1.5 +/- 0.4 and 5.1 +/- 2.7% respectively. The measured yields of PQs were 3.6 +/- 0.8% for 9,10-PQ and 2.7 +/- 1.1% for 1,4-PQ. From the measured yield data, the atmospheric formation of PAH-QNs was estimated and the importance of the atmospheric formation of PAH-QNs from the gas phase reaction of PAHs with the OH radical is discussed.
DOI
10.1071/EN14150
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엘텍공과대학 > 화학신소재공학전공 > Journal papers
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