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The effect of agitation on the biodegradation of hydrocarbon contaminants in soil slurries

Stroud, Jacqueline L. and Paton, Graeme I. and Semple, Kirk T. (2009) The effect of agitation on the biodegradation of hydrocarbon contaminants in soil slurries. Chemosphere, 77 (1). pp. 123-128. ISSN 0045-6535

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Abstract

Slurry-based mineralisation assays are widely used to investigate contaminant biodegradation in soil; however, the importance of shaking speed on microbial degradation has not been considered. This study investigated the mineralisation of C-14-analogues of phenanthrene, hexadecane and octacosane, shaken at 0, 25 and 100 rpm. The results showed that the fastest rates and highest levels of mineralisation in 0 d aged soils were in the highly agitated conditions (100 rpm). However, the highest levels of mineralisation in 500 d aged soil were found in the gently shaken conditions (<= 25 rpm), with the levels of mineralisation significantly (p < 0.05) one third higher than under the highly agitated conditions (100 rpm). Consequently, estimation of the maximum levels of biodegradation of organic contaminants in aged soil systems should be considered under gentle mixing conditions.

Item Type: Article
Journal or Publication Title: Chemosphere
Uncontrolled Keywords: Phenanthrene ; Hexadecane ; Biodegradation ; Mineralisation
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 58446
Deposited By: ep_importer_pure
Deposited On: 19 Sep 2012 12:20
Refereed?: Yes
Published?: Published
Last Modified: 26 Mar 2014 10:23
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/58446

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