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Concentrations and gas-particle partitioning of PCDD/Fs in the urban air of Dalian, China.
Chin. Sci. Bull. 57, 3442-3451 (2012)
Publ. Version/Full Text Volltext
DOI
PCDD/Fs in the urban air of Dalian, China were monitored with high-volume active sampler from November 2009 to October 2010. The concentration of Cl4-8DD/Fs ranged from 3065 to 49538 fg m(-3), with an average of 10249 fg m(-3). The international toxic equivalents (I-TEQ) value of that was 61.8-1182 fg m(-3), with an average of 235 fg m(-3), which was comparable to those in the other urban locations around the world. It was found that the Cl4-8DD/Fs appeared to be present mainly in the particle phase during winter, spring and autumn, while during summer which were dominantly in gas phase. The ratio of Cl4-8DD/Fs present in particle phase increased with the increasing level of chlorination. The concentrations of PCDFs and PCDDs decreased with the increase of chlorinated level, while the concentrations of 2,3,7,8-PCDDs congeners increased with the increase of chlorination level. The homolog profiles of the concentrations of PCDFs presented were higher than those of the PCDDs, which indicated the PCDD/Fs pollution source of the air in Dalian was characteristic for thermal source pollution. The correlation analysis of meteorological parameters with the concentrations of Cl4-8CDD/Fs was conducted using SPSS packages, and it was found that the ambient temperature and atmospheric pressure were important factors influence the concentration of PCDD/Fs in the air. The respiratory risk and intake dioxins of the residents around the sampling sites were studied in the paper. It was found that Junge-Pankow model was much more accurate in predicting the gas-particle partitioning behavior of PCDD/Fs homologues during winter, while the Harner-Bidleman model shows better agreement with the measured data during winter and summer.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Pcdd/fs ; Urban Air ; Gas-particle Partitioning ; Dalian; DIBENZO-P-DIOXINS; YA-ER LAKE; ORGANIC-COMPOUNDS; ATMOSPHERIC PCDD/FS; AMBIENT AIR; EQUILIBRIUM; AREA; COEFFICIENT; TEMPERATURE; EMISSIONS
ISSN (print) / ISBN
1001-6538
e-ISSN
1861-9541
Quellenangaben
Volume: 57,
Issue: 26,
Pages: 3442-3451
Publisher
Chinese Acad. of Sciences
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
PPM-MEX-Molecular EXposomics (MEX)