4.7 Article

Microbial formation and degradation of oxygen-containing polycyclic aromatic hydrocarbons (OPAHs) in soil during short-term incubation

期刊

ENVIRONMENTAL POLLUTION
卷 184, 期 -, 页码 385-390

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ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2013.09.020

关键词

Incubation; OPAHs; PAHs; Urban soil; Microbial degradation

资金

  1. Swiss National Science Foundation [200021_131938/1]
  2. Swiss National Science Foundation (SNF) [200021_131938] Funding Source: Swiss National Science Foundation (SNF)

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We tested whether OPAHs were formed during 19-wk incubation of a fertile soil at optimum moisture in the dark. The soil had initial mean (+/- s.e., n = 3) concentrations of 22 +/- 1.7 (Sigma 28PAHs) and 4.2 +/- 0.34 mu g g(-1) (Sigma 14OPAHs). After 19 wk, individual PAH and OPAH concentrations had decreased by up to 14 and 37%, respectively. Decreases in % of initial concentrations were positively correlated with their K-ow values for PAHs (r = 0.48, p = 0.022) and 9 OPAHs (r = 0.78, p = 0.013) but negatively, albeit not significantly, for 5 OPAHs (r = -0.75, p = 0.145) suggesting net formation of some OPAHs. The latter was supported by significantly increasing 1-indanone/fluorene ratios while the other OPAH to parent-PAH ratios remained constant or tended to increase. We conclude that OPAHs are formed in soils during microbial turnover of PAHs in a short time. (C) 2013 Elsevier Ltd. All rights reserved.

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