Factors which influence polycyclic aromatic hydrocarbon decomposition on wood smoke particles

Kamens, Richard M.; Perry, Jean M.; Saucy, Daniel A.; Bell, Douglas A.; Newton, David L.; Brand, Barbara

doi:10.1016/0160-4120(85)90006-6

Cited by 44 publications

(30 citation statements)

References 8 publications

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“…In these experiments, after several hours of sunlight exposure, concentrations of benzo(a)pyrene declined from a level of about 50 ng/mg of wood smoke to the few ng per mg usually observed in the ambient atmosphere. 129 It is possible that after an initial rapid degradation, the remaining PAH degrade at a much slower rate, thus explaining the relative stability of the PAH profiles of urban areas reported by Grimmer et a/. 53 In view of what is currently known about PAH reactivity, it is advisable at present to attempt to use PAH profiles for source identification only under wintertime conditions.…”

Section: Discussionmentioning

confidence: 99%

Profiles of Organic Particulate Emissions from Air Pollution Sources: Status and Needs for Receptor Source Apportionment Modeling

Daisey

Cheney

Lioy

1986

Journal of the Air Pollution Control Association

138

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Section: Discussionmentioning

confidence: 99%

Profiles of Organic Particulate Emissions from Air Pollution Sources: Status and Needs for Receptor Source Apportionment Modeling

Daisey

Cheney

Lioy

1986

Journal of the Air Pollution Control Association

138

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“…In the gas phase, the dominant loss process of PAHs during the daytime is reaction with the OH radical (Arey, 1998;Atkinson and Arey, 1994). In the particle phase, PAHs may undergo photolysis or reaction with oxidants such as OH, ozone, nitrogen oxides, and nitric acid; and the rate of reaction depends on the nature of the underlying particles and meteorological factors (Behymer and Hites, 1988;Calvert et al, 2002;Finlayson-Pitts and Pitts, 2000;Kamens et al, 1986Kamens et al, , 1988Kamens et al, , 1985. Recent laboratory experiments suggest that OH addition to pyrene and subsequent reactions can lead to its removal from particles, in the form of volatile products .…”

Section: C Marr Et Al: Sources and Transformations Of Pahs In Mementioning

confidence: 99%

Sources and transformations of particle-bound polycyclic aromatic hydrocarbons in Mexico City

et al. 2006

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Abstract. Understanding sources, concentrations, and transformations of polycyclic aromatic hydrocarbons (PAHs) in the atmosphere is important because of their potent mutagenicity and carcinogenicity. The measurement of particlebound PAHs by three different methods during the Mexico City Metropolitan Area field campaign in April 2003 presents a unique opportunity for characterization of these compounds and intercomparison of the methods. The three methods are (1) collection and analysis of bulk samples for time-integrated gas-and particle-phase speciation by gas chromatography/mass spectrometry; (2) aerosol photoionization for fast detection of PAHs on particles' surfaces; and (3) aerosol mass spectrometry for fast analysis of size and chemical composition. This research represents the first time aerosol mass spectrometry has been used to measure ambient PAH concentrations and the first time that fast, real-time methods have been used to quantify PAHs alongside traditional filter-based measurements in an extended field campaign. Speciated PAH measurements suggest that motor vehicles and garbage and wood burning are important sources in Mexico City. The diurnal concentration patterns captured by aerosol photoionization and aerosol mass spectrometry are generally consistent. Ambient concentrations of particlephase PAHs typically peak at ∼110 ng m −3 during the morning rush hour and rapidly decay due to changes in source activity patterns and dilution as the boundary layer rises, although surface-bound PAH concentrations decay faster. The more rapid decrease in surface versus bulk PAH concentraCorrespondence to: L. C. Marr (lmarr@vt.edu) tions during the late morning suggests that freshly emitted combustion-related particles are quickly coated by secondary aerosol material in Mexico City's atmosphere and may also be transformed by heterogeneous reactions.

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“…Heterogeneous ozonation was also studied with PAHs associated with different organic and inorganic substrates, such as soot, fly ash, water droplets, etc. (Murray and Singh, 1997;Kamens et al, 1985;Raja and Valsaraj, 2006;Kwamena et al, 2004;Perraudin et al, 2007a,b;Beltran et al, 1995Beltran et al, ,, 1999Kahan et al, 2006). Three-ring member phenanthrene exists mainly in gas phase in ambient air (May and Wise, 1984;Niles and Tan, 1989;Arey et al, 1987;Helmig and Harger, 1994;Vasilakos et al, 2007) because of its high vapor pressure at room temperature (1.6 Â 10 À2 Pa, 298 K, Osborn and Douslin, 1975).…”

Section: Introductionmentioning

confidence: 99%

Homogeneous and heterogeneous reactions of phenanthrene with ozone

Zhang

Yang

Meng

et al. 2010

Atmospheric Environment

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a b s t r a c tThe reactions of gas-phase phenanthrene and suspended phenanthrene particles with ozone were conducted in a 200l chamber. The secondary organic aerosol formation was observed in the reaction of gas-phase phenanthrene with ozone and simultaneously the size distribution of the secondary organic aerosol was monitored with a scanning mobility particle sizer during the formation process. The particulate ozonation products from both reactions were analyzed with a vacuum ultraviolet photoionization aerosol time-of-flight mass spectrometer. 2,2 0 -Diformylbiphenyl was identified as the dominant product in both homogeneous and heterogeneous reactions of phenanthrene with ozone. GC/MS analysis of ozonation products of phenanthrene in glacial acetic acid was carried out for assigning time-of-flight mass spectra of reaction products formed in the homogeneous and heterogeneous reactions of phenanthrene with ozone.

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Factors which influence polycyclic aromatic hydrocarbon decomposition on wood smoke particles

Cited by 44 publications

References 8 publications

Profiles of Organic Particulate Emissions from Air Pollution Sources: Status and Needs for Receptor Source Apportionment Modeling

Profiles of Organic Particulate Emissions from Air Pollution Sources: Status and Needs for Receptor Source Apportionment Modeling

Sources and transformations of particle-bound polycyclic aromatic hydrocarbons in Mexico City

Homogeneous and heterogeneous reactions of phenanthrene with ozone

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