| Literature DB >> 17291643 |
Mareike Braeckevelt1, Hemal Rokadia, Gwenaël Imfeld, Nicole Stelzer, Heidrun Paschke, Peter Kuschk, Matthias Kästner, Hans-H Richnow, Stefanie Weber.
Abstract
The degradation of monochlorobenzene (MCB) was assessed in a constructed wetland treating MCB contaminated groundwater using a detailed geochemical characterisation, stable isotope composition analysis and in situ microcosm experiments. A correlation between ferrous iron mobilisation, decreasing MCB concentration and enrichment in carbon isotope composition was visible at increasing distance from the inflow point, indicating biodegradation of MCB in the wetland. Additionally, in situ microcosm systems loaded with 13C-labelled MCB were deployed for the first time in sediments to investigate the biotransformation of MCB. Incorporation of 13C-labelled carbon derived from the MCB into bacterial fatty acids substantiated in situ degradation of MCB. The detection of 13C-labelled benzene indicated reductive dehalogenation of MCB. This integrated approach indicated the natural attenuation of the MCB in a wetland system. Further investigations are required to document and optimise the in situ biodegradation of MCB in constructed and natural wetland systems treating contaminated groundwater.Entities:
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Year: 2007 PMID： 17291643 DOI： 10.1016/j.envpol.2006.12.008
Source DB: PubMed Journal: Environ Pollut ISSN： 0269-7491 Impact factor: 8.071