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<front>
<journal-meta>
<journal-id journal-id-type="publisher">ACP</journal-id>
<journal-title-group>
<journal-title>Atmospheric Chemistry and Physics</journal-title>
<abbrev-journal-title abbrev-type="publisher">ACP</abbrev-journal-title>
</journal-title-group>
<issn pub-type="epub">1680-7324</issn>
<publisher><publisher-name>Copernicus GmbH</publisher-name>
<publisher-loc>Göttingen, Germany</publisher-loc>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.5194/acp-8-1277-2008</article-id>
<title-group>
<article-title>Real-time characterization of particle-bound polycyclic aromatic hydrocarbons in ambient aerosols and from motor-vehicle exhaust</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Polidori</surname>
<given-names>A.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Hu</surname>
<given-names>S.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Biswas</surname>
<given-names>S.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Delfino</surname>
<given-names>R. J.</given-names>
</name>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Sioutas</surname>
<given-names>C.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Department of Civil and Environmental Engineering, University of Southern California, 3620 South Vermont Ave., Los Angeles, CA, 90089, USA</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>Epidemiology Division, Department of Medicine, University of California Irvine, 100 Theory Dr., Suite 100, Irvine, CA 92617, USA</addr-line>
</aff>
<pub-date pub-type="epub">
<day>04</day>
<month>03</month>
<year>2008</year>
</pub-date>
<volume>8</volume>
<issue>5</issue>
<fpage>1277</fpage>
<lpage>1291</lpage>
<permissions>
<license xlink:type="simple">
<license-p>This is an open-access article ditributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.</license-p>
</license>
</permissions>
<self-uri xlink:href="http://www.atmos-chem-phys.net/8/1277/2008/acp-8-1277-2008.html">This article is available from http://www.atmos-chem-phys.net/8/1277/2008/acp-8-1277-2008.html</self-uri>
<self-uri xlink:href="http://www.atmos-chem-phys.net/8/1277/2008/acp-8-1277-2008.pdf">The full text article is available as a PDF file from http://www.atmos-chem-phys.net/8/1277/2008/acp-8-1277-2008.pdf</self-uri>
<abstract>
<p>A photo-electric aerosol sensor, a diffusion charger, an Aethalometer, and a
continuous particle counter were used along with other real-time instruments
to characterize the particle-bound polycyclic aromatic hydrocarbon (p-PAH)
content, and the physical/chemical characteristics of aerosols collected a)
in Wilmington (CA) near the Los Angeles port and close to 2 major freeways,
and b) at a dynamometer testing facility in downtown Los Angeles (CA), where
3 diesel trucks were tested. In Wilmington, the p-PAH, surface area,
particle number, and &quot;black&quot; carbon concentrations were 4-8 times higher
at 09:00&amp;ndash;11:00 a.m. than between 17:00 and 18:00 p.m., suggesting that during rush
hour traffic people living in that area are exposed to a higher number of
diesel combustion particles enriched in p-PAH coatings. Dynamometer tests
revealed that the p-PAH emissions from the &quot;baseline&quot; truck (no catalytic
converter) were up to 200 times higher than those from the 2 vehicles
equipped with advanced emission control technologies, and increased when the
truck was accelerating. In Wilmington, integrated filter samples were
collected and analyzed to determine the concentrations of the most abundant
p-PAHs. A correlation between the total p-PAH concentration (μg/m&lt;sup&gt;3&lt;/sup&gt;) and the measured photo-electric aerosol sensor signal (fA) was
also established. Estimated ambient p-PAH concentrations (Average=0.64 ng/m&lt;sup&gt;3&lt;/sup&gt;; Standard deviation=0.46 ng/m&lt;sup&gt;3&lt;/sup&gt; were in good agreement
with those reported in previous studies conducted in Los Angeles during a
similar time period. Finally, we calculated the approximate theoretical
lifetime (70 years per 24-h/day) lung-cancer risk in the Wilmington area
due to inhalation of multi-component p-PAHs and &quot;black&quot; carbon. Our
results indicate that the lung-cancer risk is highest during rush hour
traffic and lowest in the afternoon, and that the genotoxic risk of the
considered p-PAHs does not seem to contribute to a significant part of the
total lung-cancer risk attributable to &quot;black&quot; carbon.</p>
</abstract>
<counts><page-count count="15"/></counts>
</article-meta>
</front>
<body/>
<back>
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