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The influence of single and multiple applications of pyrene on the evolution of pyrene catabolism in soil.

Macleod, Christopher J. A. and Semple, Kirk T. (2006) The influence of single and multiple applications of pyrene on the evolution of pyrene catabolism in soil. Environmental Pollution, 139 (3). pp. 455-460. ISSN 0269-7491

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Abstract

The influence of pyrene added in a single application (0, 50, 100 and 200 mg kg(-1)) was investigated in Multiple applications (1 X 50, 2 X 50 and 4 X 50 mg kg(-1)) on the evolution of catabolic activity in a pristine pasture soil. The microbial community's ability to degrade pyrene was assessed at 0, 4, 8 and 12 weeks by the mineralization of added C-14-pyrene. Significant mineralization (> 5%) of added C-14-pyrene only occurred after 4 weeks soil-pyrene contact time in most of the pyrene-amended soils. Pyrene-amended soils showed statistically significantly shorter (P < 0.05) lag times compared to the control soil after 8 and 12 weeks soil-pyrene contact time. Further, the rates of degradation increased in the presence of pyrene, peaking at 8 weeks. In terms of the overall extents of pyrene mineralization, there were statistically significant increases (P < 0.05) between 4 and 8 weeks, with little difference between 8 and 12 weeks, with the general trend that an increase in pyrene concentration resulted in higher levels of mineralization. Increasing the concentration and number of pyrene additions can have a significant impact on the adaptation of the soil microflora to degrade pyrene over time. (c) 2005 Elsevier Ltd. All rights reserved.

Item Type: Article
Journal or Publication Title: Environmental Pollution
Uncontrolled Keywords: PAHs ; soil microflora ; catabolic activity ; contaminated soil
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 18541
Deposited By: Prof Kirk T. Semple
Deposited On: 27 Oct 2008 11:40
Refereed?: Yes
Published?: Published
Last Modified: 18 Sep 2013 16:18
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/18541

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