Combining measurements and modelling to quantify the contribution of atmospheric fallout, local industry and road traffic to PAH stocks in contrasting catchments

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• 作者：David Gateuille^a ; ^b ; ^c ; ^d ; ^{david.gateuille@lsce.ipsl.fr" class="auth_mail} ; Olivier Evrard^a ; Irè ; ne Lefevre^a ; Elodie Moreau-Guigon^b ; ^c ; ^d ; Fabrice Alliot^b ; ^c ; ^d ; Marc Chevreuil^b ; Jean-Marie Mouchel^b ; ^c ; ^d
• 关键词：PAHs ; Soil ; Source contribution ; Spatial variation ; Model
• 刊名：Environmental Pollution
• 出版年：June, 2014
• 年：2014
• 卷：189
• 期：Complete
• 页码：152-160
• 全文大小：2604 K

文摘

Various sources supply PAHs that accumulate in soils. The methodology we developed provided an evaluation of the contribution of local sources (road traffic, local industries) versus remote sources (long range atmospheric transport, fallout and gaseous exchanges) to PAH stocks in two contrasting subcatchments (46-614聽km虏) of the Seine River basin (France). Soil samples (n聽=聽336) were analysed to investigate the spatial pattern of soil contamination across the catchments and an original combination with radionuclide measurements provided new insights into the evolution of the contamination with depth. Relationships between PAH concentrations and the distance to the potential sources were modelled. Despite both subcatchments are mainly rural, roadside areas appeared to concentrate 20% of the contamination inside the catchment while a local industry was found to be responsible for up to 30% of the stocks. Those results have important implications for understanding and controlling PAH contamination in rural areas of early-industrialized regions.