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

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• 作者：Wolfgang Wilcke ; Mario Kiesewetter ; Benjamin A. Musa B ; owe
• 关键词：Incubation ; OPAHs ; PAHs ; Urban soil ; Microbial degradation
• 刊名：Environmental Pollution
• 出版年：January, 2014
• 年：2014
• 卷：184
• 期：Complete
• 页码：385-390
• 全文大小：520 K

文摘

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 (卤s.e., n聽=聽3) concentrations of 22聽卤聽1.7 (危28PAHs) and 4.2聽卤聽0.34聽渭g聽g^鈭? (危14OPAHs). After 19聽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聽=聽0.48, p聽=聽0.022) and 9 OPAHs (r聽=聽0.78, p聽=聽0.013) but negatively, albeit not significantly, for 5 OPAHs (r聽=聽鈭?.75, p聽=聽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.