%0 Journal Article %J J Environ Monit %D 2010 %T Effect of dibenzopyrene measurement on assessing air quality in Beijing air and possible implications for human health. %A Julie A Layshock %A Staci M Simonich %A Kim A Anderson %K Air Pollutants %K China %K Cities %K Environmental Exposure %K Environmental Monitoring %K Epidemiological Monitoring %K Humans %K Lung Neoplasms %K Particle Size %K Polycyclic Hydrocarbons, Aromatic %K Risk %K Seasons %X

Size fractionated particulate matter (PM) was collected in summer and winter from Beijing, China for the characterization of an expanded list of PAHs and evaluation of air pollution metrics. Summertime ΣPAHs on PM was 14.6 ± 29(PM 1.5), 0.88 ± 0.49(PM 1.5-7.2) and 0.29 ± 0.076(PM 7.2) ng m(-3) air while wintertime concentrations were 493 ± 206(PM 1.5), 26.7 ± 14(PM 1.5-7.2) and 5.3 ± 2.5(PM 7.2) ng m(-3) air. Greater than 90% of the carcinogenic PAHs were concentrated on PM(1.5). Dibenzopyrene isomers made up a significant portion (∼30%) of the total carcinogenic PAH load during the winter. To our knowledge, this is the first report of dibenzopyrenes in the Beijing atmosphere and among the few studies that report these highly potent PAHs in ambient particulate matter. Lifetime risk calculations indicated that 1 out of 10,000 to over 6 out of 100 Beijing residents may have an increased risk of lung cancer due to PAH concentration. Over half of the lifetime risk was attributed to Σdibenzopyrenes. The World Health Organization and Chinese daily PM(10) standard was exceeded on each day of the study, however, PAH limits were only exceeded during the winter. The outcomes of the air pollution metrics were highly dependent on the individual PAHs measured and seasonal variation.

%B J Environ Monit %V 12 %P 2290-8 %8 12/2010 %G eng %N 12 %1 http://www.ncbi.nlm.nih.gov/pubmed/20967364?dopt=Abstract %R 10.1039/c0em00057d %0 Journal Article %J Environ Toxicol Chem %D 2010 %T Ketone and quinone-substituted polycyclic aromatic hydrocarbons in mussel tissue, sediment, urban dust, and diesel particulate matrices. %A Julie A Layshock %A Glenn R Wilson %A Kim A Anderson %K Animals %K Dust %K Environmental Monitoring %K Environmental Pollutants %K Geologic Sediments %K Ketones %K Mytilus edulis %K Polycyclic Hydrocarbons, Aromatic %K Quinones %K Vehicle Emissions %X

Polycyclic aromatic hydrocarbons (PAHs) substituted with a ketone or quinone functionality (OPAHs) may be important environmental contaminants. The OPAHs from environmental samples have demonstrated toxicity and may be more harmful than PAHs. Knowledge gaps concerning the occurrence of OPAHs in the total environment arise from analytical difficulties, as well as limited standards and methodologies. An optimized method was developed to quantify five ketone and four quinone OPAHs from matrices ranging from biological tissue to diesel particulates. Five National Institute of Standards and Technology Standard Reference Materials (SRMs) were analyzed. This is the first report of OPAH quantitation in SRM 2977 (mussel tissue), SRM 1944 (New York/New Jersey, USA waterway sediment), SRM 1975 (diesel extract), and SRM 1650b (diesel particulate matter) and among the few to report concentrations from SRM 1649 (urban dust). Furthermore, this is one of the first reports of OPAHs in biological tissue. Σ₉OPAHs were 374 ± 59 mg/kg (mussel tissue), 5.4 ± 0.5 mg/kg (sediment), 16.9 ± 1.6 mg/kg (urban dust), 33.4 ± 0.4 mg/kg (diesel extract), and 150 ± 43 mg/kg (diesel particulate matter). In all SRMs, the levels of OPAHs were similar to or exceeded levels of PAHs. Of the OPAHs tested, the most frequently occurring in the environmental matrices were 9-fluorenone, 9,10-anthraquinone, benzofluorenone, and 7,12-benz[a]anthracenequinone.

%B Environ Toxicol Chem %V 29 %P 2450-60 %8 11/2010 %G eng %N 11 %1 http://www.ncbi.nlm.nih.gov/pubmed/20830751?dopt=Abstract %R 10.1002/etc.301