Polycyclic aromatic hydrocarbons (PAHs) and their polar derivatives (oxygenated PAHs, azaarenes) in soils along a climosequence in Argentina

Wilcke, Wolfgang; Bandowe, Benjamin; Gomez Lueso, Maria; Ruppenthal, Marc; del Valle, Hector; Oelmann, Yvonne (2014). Polycyclic aromatic hydrocarbons (PAHs) and their polar derivatives (oxygenated PAHs, azaarenes) in soils along a climosequence in Argentina. Science of the total environment, 473-474, pp. 317-325. Elsevier 10.1016/j.scitotenv.2013.12.037

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We evaluated the effects of soil properties and climate on concentrations of parent and oxygenated polycyclic aromatic compounds (PAHs and OPAHs) and azaarenes (AZAs) in topsoil and subsoil at 20 sites along a 2100-km north (N)–south (S) transect in Argentina. The concentrations of Σ29PAHs, Σ15OPAHs and Σ4AZAs ranged 2.4–38 ng g− 1, 0.05–124 ng g− 1 and not detected to 0.97 ng g− 1, respectively. With decreasing anthropogenic influence from N to S, low molecular weight PAHs increasingly dominated. The octanol–water partitioning coefficients correlated significantly with the subsoil to topsoil concentration ratios of most compounds suggesting leaching as the main transport process. Organic C concentrations correlated significantly with those of many compounds typical for atmosphere–soil partitioning. Lighter OPAHs were mainly detected in the S suggesting biological sources and heavier OPAHs in the N suggesting a closer association with parent-PAHs. Decreasing alkyl-naphthalene/naphthalene and 9,10-anthraquinone (9,10-ANQ)/anthracene ratios from N to S indicated that 9,10-ANQ might have originated from low-temperature combustion.

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:

Wilcke, Wolfgang; Bandowe, Benjamin and Gomez Lueso, Maria

Subjects:

900 History > 910 Geography & travel

ISSN:

0048-9697

Publisher:

Elsevier

Language:

English

Submitter:

Monika Wälti-Stampfli

Date Deposited:

18 Jun 2014 10:58

Last Modified:

21 Aug 2015 11:36

Publisher DOI:

10.1016/j.scitotenv.2013.12.037

BORIS DOI:

10.7892/boris.52369

URI:

https://boris.unibe.ch/id/eprint/52369

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