Recovery of microbial diversity and activity during bioremediation following chemical oxidation of diesel contaminated soils
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Type
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Journal Article
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Author
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Nora B. Sutton
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Author
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Alette A. M. Langenhoff
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Author
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Daniel Hidalgo Lasso
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Author
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Bas van der Zaan
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Author
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Pauline van Gaans
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Author
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Farai Maphosa
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Author
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Hauke Smidt
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Author
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Tim Grotenhuis
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Author
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Huub H. M. Rijnaarts
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URL
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Volume
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98
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Issue
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6
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Pages
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2751-2764
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Publication
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Applied Microbiology and
Biotechnology
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Date
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2014/03/01
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Abstract
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To improve the coupling of in situ chemical
oxidation and in situ bioremediation, researchers analyzed the effect of
chemical oxidation with Fenton's reagent, modified Fenton's reagent,
permanganate, or persulfate, on microbial diversity and activity during 8
weeks of incubation in two diesel-contaminated soils (peat and fill).
Chemical oxidant and soil type affected the microbial community diversity and biodegradation activity. This was observed, however, following treatment with Fenton's reagent and modified Fenton's reagent, and in the biotic control without oxidation. Differences in the highest overall removal efficiencies of 69 % for peat (biotic control) and 59 % for fill (Fenton's reagent) were partially explained by changes in contaminant soil properties upon oxidation. Molecular analysis of 16S rRNA and alkane monooxygenase (alkB) gene abundances indicated that oxidation with Fenton's reagent and modified Fenton's reagent negatively affected microbial abundance. Understanding microbial community dynamics during coupled chemical oxidation and bioremediation is integral to improved biphasic field application. |
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