Sources and fate of polycyclic aromatic compounds (PAHs, oxygenated PAHs and azaarenes) in forest soil profiles opposite of an aluminium plant

The Science of the Total Environment
Benjamin A Musa BandoweW Wilcke

Abstract

Little is known about oxygenated polycyclic aromatic hydrocarbons (OPAHs) and azaarenes (AZAs) in forest soils. We sampled all horizons of forest soils from five locations at increasing distances from an Al plant in Slovakia, and determined their polycyclic aromatic compound (PACs) concentrations. The ∑29PAHs concentrations were highest in the Oa and lowest in the Oi horizon, while the ∑14OPAHs and ∑4AZAs concentrations did not show a consistent vertical distribution among the organic horizons. The concentration ratios of PAHs and OPAHs between deeper O horizons and their overlying horizon (enrichment factors) were positively correlated with the octanol-water partition coefficients (KOW) at several locations. This is attributed to the slower degradation of the more hydrophobic PACs during organic matter decomposition. PACs concentrations decreased from the organic layer to the mineral horizons. The concentrations of ∑29PAHs (2400-17,000 ng g-1), ∑14OPAHs (430-2900 ng g-1) and ∑4AZAs (27-280 ng g-1) in the mineral A horizon generally decreased with increasing distance from the Al plant. In the A horizons, the concentrations of ∑29PAHs were correlated with those of ∑14OPAHs (r = 0.95, p = 0.02) and ∑4AZAs (r = 0.93, p = 0.02) sug...Continue Reading

References

Jan 1, 1996·Environmental Pollution·W WilckeJ Kobza
Apr 28, 2006·Integrated Environmental Assessment and Management·Jerry M NeffDonald G Gunster
Oct 21, 2006·Environmental Science & Technology·Erping BiStefan B Haderlein
Sep 14, 2010·Journal of Environmental Quality·Benjamin A Musa Bandowe, Wolfgang Wilcke
Sep 21, 2013·Environmental Science & Technology·Bernhard AichnerSebastian Hein
Mar 1, 1996·Environmental Science and Pollution Research International·M PichlerW Zech
Apr 15, 2014·Environmental Science & Technology·Markus BrinkmannHenner Hollert

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