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Type: Journal article
Title: Diethyl phthalate in compost: Ecotoxicological effects and response of the microbial community
Author: Kapanen, A.
Stephen, J.
Brueggemann, J.
Kiviranta, A.
White, D.
Itavaara, M.
Citation: Chemosphere, 2007; 67(11):2201-2209
Publisher: Pergamon-Elsevier Science Ltd
Issue Date: 2007
ISSN: 0045-6535
Statement of
A. Kapanen, J.R. Stephen, J. Brüggemann, A. Kiviranta, D.C. White and M. Itävaara
Abstract: There is a great need to understand the environmental impacts of organic pollutants on soil health. Phthalates are widely used in consumables and can be found extensively. We studied the toxicity of diethyl phthalate (DEP), spiked in a compost plant growth substrate, by means of the acute toxicity Flash test and on the basis of the germination and plant growth of radish seedlings. The response of the microbial community to DEP in the growth substrate was studied by PCR-DGGE (denaturing gradient gel electrophoresis). In the acute toxicity test, DEP was found to be less toxic as a pure compound than when mixed with the compost mixture. This suggests the synergistic effect of unknown toxic compounds or the release of compounds due to DEP addition. The same DEP concentration level in compost substrate induced toxic response in both plant test and microbial community analysis. The diversity of the major microbial community was reduced from a broad community to only 10 major species at toxic concentrations of DEP. Several of the identified microbial species are known to be able to degrade phthalates, which means that the suppression of other microbial species might be due to the substrate availability and toxicity. The major species identified included Sphingomonas sp., Pseudomonas sp., Actinomycetes sp.
Keywords: Raphanus
Phthalic Acids
Culture Media
Soil Pollutants
Electrophoresis, Gel, Pulsed-Field
Reverse Transcriptase Polymerase Chain Reaction
Soil Microbiology
Molecular Sequence Data
Aliivibrio fischeri
Plant Development
Rights: Copyright © 2007 Elsevier Ltd All rights reserved.
DOI: 10.1016/j.chemosphere.2006.12.023
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Appears in Collections:Agriculture, Food and Wine publications
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