TY  - JOUR
AU  - Masy, Thibaut
AU  - Caterina, David
AU  - Tromme, Olivier
AU  - Lavigne, Benoît
AU  - Thonart, Philippe
AU  - Hiligsmann, Serge
AU  - Nguyen, Frédéric
TI  - Electrical resistivity tomography to monitor enhanced biodegradation of hydrocarbons with Rhodococcus erythropolis T902.1 at a pilot scale
JO  - Journal of contaminant hydrology
VL  - 184
SN  - 0169-7722
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2016-01122
SP  - 1 - 13
PY  - 2016
AB  - Petroleum hydrocarbons (HC) represent the most widespread contaminants and in-situ bioremediation remains a competitive treatment in terms of cost and environmental concerns. However, the efficiency of such a technique (by biostimulation or bioaugmentation) strongly depends on the environment affected and is still difficult to predict a priori. In order to overcome these uncertainties, Electrical Resistivity Tomography (ERT) appears as a valuable non-invasive tool to detect soil heterogeneities and to monitor biodegradation. The main objective of this study was to isolate an electrical signal linked to an enhanced bacterial activity with ERT, in an aged HC-contaminated clay loam soil. To achieve this, a pilot tank was built to mimic field conditions. Compared to a first insufficient biostimulation phase, bioaugmentation with Rhodococcus erythropolis T902.1 led to a HC depletion of almost 80% (6900 to 1600 ppm) in 3 months in the center of the contaminated zone, where pollutants were less bioavailable. In the meantime, lithological heterogeneities and microbial activities (growth and biosurfactant production) were successively discriminated by ERT images. In the future, this cost-effective technique should be more and more transferred to the field in order to monitor biodegradation processes and assist in selecting the most appropriate remediation technique.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000370768400001
C6  - pmid:26697744
DO  - DOI:10.1016/j.jconhyd.2015.11.001
UR  - https://juser.fz-juelich.de/record/281429
ER  -