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

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Publication date 2014
Author Wilcke Wolfgang, Benjamin A. Musa Bandowe, Gomez Luso Maria, Ruppenthal Marc, del Valle Hector, Oelmann Yvonne,
Project Oxidierte polyzyklische aromatische Kohlenwasserstoffe im Boden
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Original article (peer-reviewed)

Journal The Science of the Total Environment
Volume (Issue) 473–474
Page(s) 317 - 325
Title of proceedings The Science of the Total Environment
DOI 10.1016/j.scitotenv.2013.12.037

Abstract

Weevaluated 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, 0.05–124 ng/g and not detected to 0.97 ng/g, 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.
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