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Importance of chemical structure on the development of hydrocarbon catabolism in soil.

Stroud, Jacqueline L. and Paton, Graeme I. and Semple, Kirk T. (2007) Importance of chemical structure on the development of hydrocarbon catabolism in soil. FEMS Microbiology Letters, 272 (1). pp. 120-126. ISSN 0378-1097

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Abstract

A soil was amended with C-14-analogues of naphthalene, phenanthrene, pyrene, B[a]P or hexadecane at 50 mg kg(-1) and the development of catabolic activity was assessed by determining the rate and extent of (CO2)-C-14 evolution at time points over 180 days. The catabolic potential of the soil was hexaclecane > naphthalene > phenanthrene > pyrene > B[a]P, determined by the decrease in lag time (as defined by the time taken for 5% (CO2)-C-14 to be evolved from the minerialization of the C-14-labeled hydrocarbons). The results clearly showed the difference between constitutive and inducible biodegradation systems. The 0 day time point showed that hexadecane minerialization was rapid and immediate, with a 45.4 +/- 0.6% mineralization extent, compared with pyrene minerialization at 1.0 +/- 0.1%. However, catabolism for pyrene developed over time and after a 95 days soil-pyrene contact time, mineralization extent was found to be 63.1 +/- 7.8%. Strong regression was found (r(2) > 0.99) between the maximum rates of mineralization and the partioning coefficient between the mineralized hydrocarbons, which may indicate linearity in the system.}

Item Type: Article
Journal or Publication Title: FEMS Microbiology Letters
Uncontrolled Keywords: hexadecane ; PAHs ; indigenous catabolic activity ; ageing
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Mathematics and Statistics
Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 18526
Deposited By: Prof Kirk T. Semple
Deposited On: 27 Oct 2008 13:11
Refereed?: Yes
Published?: Published
Last Modified: 18 Sep 2013 16:18
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/18526

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