Mobilization of hydrophobic contaminants from soils by enzymatic depolymerization of soil organic matter

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dc.contributor.authorWicke, D.
dc.contributor.authorReemtsma, T.
dc.date.accessioned2010-07-26T21:12:10Z
dc.date.available2010-07-26T21:12:10Z
dc.date.issued2010en
dc.description.abstractThe effect of hydrolytic exoenzymes on the release of hydrophobic organic contaminants (HOC) from two different surface soils was studied in laboratory batch experiments. Incubation of the soils with cellulase with an activity fivefold above the inherent soil activity enhanced the release of hydrophobic contaminants (polycyclic aromatic hydrocarbons (PAH), polychlorinated biphenyls (PCB) and hydroxylated PCB) by 40–200%. Xylanase and invertase did not show measurable effects at comparable relative activity levels. This suggests that cellulose substructures are important for the retention of HOC in soil organic matter (SOM). Hydrolytic exoenzymes, and the microorganisms that release them, contribute to the mobilization of HOC from soil, by shifting the sorption equilibrium in the course of SOM transformation into dissolved organic matter or by facilitating HOC diffusion as a consequence of reduced rigidity of SOM. We conclude that not only biodegradation but also sorption and desorption of HOC in soil can be influenced by (micro-) biology and the factors that determine its activity.en
dc.identifier.citationWicke, D., Reemtsma, T. (2010) Mobilization of hydrophobic contaminants from soils by enzymatic depolymerization of soil organic matter. Chemosphere, 78(8), pp. 996-1003.en
dc.identifier.doihttps://doi.org/10.1016/j.chemosphere.2009.12.009
dc.identifier.issn0045-6535
dc.identifier.urihttp://hdl.handle.net/10092/4154
dc.language.isoen
dc.publisherUniversity of Canterbury. Civil and Natural Resources Engineeringen
dc.rights.urihttps://hdl.handle.net/10092/17651en
dc.subjectcellulaseen
dc.subjectPAHen
dc.subjectdesorptionen
dc.subjectenzymesen
dc.subjectPCBen
dc.subjectbacteriaen
dc.subject.marsdenFields of Research::300000 Agricultural, Veterinary and Environmental Sciences::300100 Soil and Water Sciencesen
dc.subject.marsdenFields of Research::290000 Engineering and Technology::290800 Civil Engineeringen
dc.titleMobilization of hydrophobic contaminants from soils by enzymatic depolymerization of soil organic matteren
dc.typeJournal Article
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