Biodegradation: Updating the Concepts of Control for Microbial Cleanup in Contaminated Aquifers

Rainer U. Meckenstock, Martin Elsner, Christian Griebler, Tillmann Lueders, Christine Stumpp, Jens Aamand, Spiros N. Agathos, Hans-Jørgen Albrechtsen, Leen Bastiaens, Poul Løgstrup Bjerg, Nico Boon, Winnie Dejonghe, Wei E. Huang, Susanne I. Schmidt, Erik Smolders, Sebastian R. Sørensen, Dirk Springael, Boris M. van Breukelen

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    Abstract

    Biodegradation is one of the most favored and sustainable means of removing organic pollutants from contaminated aquifers but the major steering factors are still surprisingly poorly understood. Growing evidence questions some of the established concepts for control of biodegradation. Here, we critically discuss classical concepts such as the thermodynamic redox zonation, or the use of steady state transport scenarios for assessing biodegradation rates. Furthermore, we discuss if the absence of specific degrader populations can explain poor biodegradation. We propose updated perspectives on the controls of biodegradation in contaminant plumes. These include the plume fringe concept, transport limitations, and transient conditions as currently underestimated processes affecting biodegradation.
    Original languageEnglish
    JournalEnvironmental Science and Technology
    Volume49
    Issue number12
    Pages (from-to)7073-7081
    Number of pages9
    ISSN0013-936X
    DOIs
    Publication statusPublished - 2015

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