Occurrence, gas/particle partitioning and carcinogenic risk of polycyclic aromatic hydrocarbons and their oxygen and nitrogen containing derivatives in Xi'an, central China

Wei, Chong; Han, Yongming; Bandowe, Benjamin; Cao, Junji; Huang, Ru-Jin; Ni, Haiyan; Tian, Jie; Wilcke, Wolfgang (2015). Occurrence, gas/particle partitioning and carcinogenic risk of polycyclic aromatic hydrocarbons and their oxygen and nitrogen containing derivatives in Xi'an, central China. Science of the total environment, 505, pp. 814-822. Elsevier 10.1016/j.scitotenv.2014.10.054

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29 parent- and alkyl-polycyclic aromatic hydrocarbons (PAHs), 15 oxygenated-PAHs (OPAHs), 11 nitrated-PAHs (NPAHs) and 4 azaarenes (AZAs) in both the gaseous and particulate phases, as well as the particulate-bound carbon fractions (organic carbon, elemental carbon, char, and soot) in ambient air sampled in March and September 2012 from an urban site in Xi'an, central China were extracted and analyzed. The average concentrations (gaseous+particulate) of 29PAHs, 15OPAHs, 11NPAHs and 4AZAs were 1267.0±307.5, 113.8±46.1, 11.8±4.8 and 26.5±11.8ngm(-3) in March and 784.7±165.1, 67.2±9.8, 9.0±1.5 and 21.6±5.1ngm(-3) in September, respectively. Concentrations of 29PAHs, 15OPAHs and 11NPAHs in particulates were significantly correlated with those of the carbon fractions (OC, EC, char and soot). Both absorption into organic matter in particles and adsorption onto the surface of particles were important for PAHs and OPAHs in both sampling periods, with more absorption occurring in September, while absorption was always the most important process for NPAHs. The total carcinogenic risk of PAHs plus the NPAHs was higher in March. Gaseous compounds, which were not considered in most previous studies, contributed 29 to 44% of the total health risk in March and September, respectively.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Geography > Physical Geography > Unit Soil Science
08 Faculty of Science > Institute of Geography

UniBE Contributor:

Bandowe, Benjamin and Wilcke, Wolfgang

Subjects:

900 History > 910 Geography & travel

ISSN:

0048-9697

Publisher:

Elsevier

Language:

English

Submitter:

Monika Wälti-Stampfli

Date Deposited:

12 Jan 2015 14:29

Last Modified:

19 Oct 2015 09:58

Publisher DOI:

10.1016/j.scitotenv.2014.10.054

Uncontrolled Keywords:

Polycyclic aromatic compounds, Carbon fractions, Gas/particle partitioning, Carcinogenic risk

BORIS DOI:

10.7892/boris.61521

URI:

https://boris.unibe.ch/id/eprint/61521

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