期刊
CHEMOSPHERE
卷 120, 期 -, 页码 431-437出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2014.08.048
关键词
Reed wetland; PAHs; Source apportionment; Carcinogenicity; Mutagenicity
资金
- major science and technology program for water pollution control and management [2013ZX07202-007]
- program for new century excellent talents in university [NCET-10-0758]
Surface soils were collected from Liaohe delta, China, the largest reed wetland in the world dominated by common reed (Phragmites australis). Samples were analyzed for sixteen priority polycyclic aromatic hydrocarbons (PAHs) by GC/MS. The potential source patterns and source contributions to seven carcinogenic PAH congeners were performed by combining of Unmix and positive matrix factorization (PMF) model with the formula of toxic equivalent quantity (TEQ(BaP)) and mutagenic equivalent quantity (MEQ(BaP)), respectively. Four source categories, including petrogenic source, biomass burning, diesel emission and coal combustion, were identified by Unmix and PMF models. For both Unmix and PMF model, the mixed sources (gasoline and diesel engine emission) contributed the most to the TEQ(BaP) and MEQ(BaP), while petrogenic source, the largest contributor for PAHs, made lower contribution to TEQ(BaP) and MEQ(BaP). Minor source contribution difference was found between two models, which might be attributed to uncertainties model parameters and species variables. Hence, it is very essential to use combined source apportionment techniques for quantitatively identifying PAHs sources and estimated their carcinogenicity and mutagenicity. (C) 2014 Elsevier Ltd. All rights reserved.
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