Enhanced biodegradation by hydraulic heterogeneities in petroleum hydrocarbon plumes

Journal of Contaminant Hydrology
R D BauerC Griebler

Abstract

In case of dissolved electron donors and acceptors, natural attenuation of organic contaminant plumes in aquifers is governed by hydrodynamic mixing and microbial activity. Main objectives of this work were (i) to determine whether aerobic and anaerobic biodegradation in porous sediments is controlled by transverse dispersion, (ii) to elucidate the effect of sediment heterogeneity on mixing and biodegradation, and (iii) to search for degradation-limiting factors. Comparative experiments were conducted in two-dimensional sediment microcosms. Aerobic toluene and later ethylbenzene degradation by Pseudomonas putida strain F1 was initially followed in a plume developing from oxic to anoxic conditions and later under steady-state mixing-controlled conditions. Competitive anaerobic degradation was then initiated by introduction of the denitrifying strain Aromatoleum aromaticum EbN1. In homogeneous sand, aerobic toluene degradation was clearly controlled by dispersive mixing. Similarly, under denitrifying conditions, microbial activity was located at the plume's fringes. Sediment heterogeneity caused flow focusing and improved the mixing of reactants. Independent from the electron accepting process, net biodegradation was always highe...Continue Reading

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Citations

Aug 4, 2009·Analytical and Bioanalytical Chemistry·Stefanie JaegerGuenter Gauglitz
Jun 12, 2012·Environmental Science & Technology·Boris M Van Breukelen, Massimo Rolle
May 7, 2014·Journal of Contaminant Hydrology·Sina KashukMagued Iskander
Jul 17, 2012·Journal of Contaminant Hydrology·Olaf A CirpkaWolfgang Nowak
May 24, 2011·Journal of Contaminant Hydrology·Michael G TrefryKlaus Regenauer-Lieb
Oct 19, 2010·Journal of Contaminant Hydrology·Pieter J HaestErik Smolders
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Nov 10, 2009·Journal of Contaminant Hydrology·Massimo RollePeter Grathwohl
Dec 18, 2013·Ground Water·Christina M HabererPeter Grathwohl
Feb 2, 2015·Journal of Contaminant Hydrology·Dominik HöyngFernando Mazo D'Affonseca
Feb 17, 2015·Environmental Science. Processes & Impacts·T J BoydY Hagimoto
Apr 16, 2011·Biotechnology and Bioengineering·Kathryn L StrobelRoseanne M Ford
Mar 23, 2017·Biotechnology and Bioengineering·Youneng Tang, Haihu Liu
Feb 1, 2021·Journal of Contaminant Hydrology·Muhammad Muniruzzaman, Massimo Rolle

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