Biodegradation of PAHs in soil : influence of chemical structure, concentration and multiple amendment.

Couling, Natalie R. and Towell, Marcie G. and Semple, Kirk T. (2010) Biodegradation of PAHs in soil : influence of chemical structure, concentration and multiple amendment. Environmental Pollution, 158 (11). pp. 3411-3420. ISSN 0269-7491

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Abstract

The influence of PAH chemical structure and concentration, added in either single (75 or 300 mg kg−1) or multiple (2 × 75, 2 × 150 or 4 × 75 mg kg−1) applications as single- or multiple-contaminant systems, on the development of PAH biodegradation in a pristine soil was investigated. Development in microbial catabolic ability was assessed at 0, 28, 56 and 84 d by monitoring 14C-naphthalene, 14C-phenanthrene and 14C-pyrene mineralisation over 14 d in respirometric assays. The presence of other contaminants influenced the ability of the indigenous microflora to mineralise structurally different contaminants over time. 14C-Naphthalene mineralisation was inhibited by the presence of other contaminants; whereas the presence of naphthalene significantly enhanced rates of mineralisation in multiple-contaminant systems containing 14C-phenanthrene and 14C-pyrene. Generally, increasing the number of contaminant applications has implications for catabolic activity of soil microbes. It is suggested the toxic nature of PAHs retarded mineralisation at increased contaminant concentrations. The simultaneous effects of PAH concentration, contaminant mixture and repeated application on the development of catabolic activity in soil.

Item Type: Journal Article
Journal or Publication Title: Environmental Pollution
Uncontrolled Keywords: /dk/atira/pure/researchoutput/libraryofcongress/ge
Subjects:
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 34279
Deposited By: Prof Kirk T. Semple
Deposited On: 27 Sep 2010 08:36
Refereed?: Yes
Published?: Published
Last Modified: 17 Sep 2019 00:47
URI: https://eprints.lancs.ac.uk/id/eprint/34279

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