Chapter 19
Field Study VII: Field Study of Three
Different Injectable Oxygen Sources
to Enhance Mono-Aromatic Solvents In Situ
Biodegradation
Ondřej Lhotský
Abstract The present field study describes a pilot remediation test of calcium
peroxide, modified calcium peroxide, and gelatinous hydrogen peroxide as oxygen
sources to enhance mono-aromatic solvents in situ biodegradation. The field study
was carried out in well permeable aquifer contaminated mainly by benzene, toluene,
and chlorobenzene. Three different Oxygen Release Compounds (ORCs) were
injected near three different monitoring wells situated in the center of the contamination plume. The injections were performed via direct push top-down method.
Each oxygen source tested was injected into two direct push probes in close vicinity
of respective monitoring well. Membrane interface probe (MIP) investigation was
utilized for targeting of the oxygen sources injections into most contaminated layers
in the subsurface. Although there was a high heterogeneity of the conditions
prevailing in the respective injection areas, it can be stated that the injection of all
the materials enhanced the in situ biodegradation and led to significant drops in the
concentrations of the contaminants. Therefore, in situ biodegradation without
bioaugmentation can be considered a feasible method for the clean-up of the
tested site.
Keywords Biodegradation · ORC · Direct-push · MIP
19.1 Introduction
Mono-aromatic solvents (e.g., BTEX and monochlorobenzene) are widespread
groundwater and soil contaminants (Kao et al. 2006; Nijenhuis et al. 2007) and
their presence in the environment often poses a threat to both human health and
O. Lhotský (*)
DEKONTA a.s., Prague, Czech Republic
Institute for Environmental Studies, Faculty of Science, Charles University, Prague, Czech
Republic
e-mail: lhotsky@dekonta.cz
© Springer Nature Switzerland AG 2020
J. Filip et al. (eds.), Advanced Nano-Bio Technologies for Water and Soil Treatment,
Applied Environmental Science and Engineering for a Sustainable Future,
https://doi.org/10.1007/978-3-030-29840-1_19
411
Field Study VII: Field Study of Three
Different Injectable Oxygen Sources
to Enhance Mono-Aromatic Solvents In Situ
Biodegradation
Ondřej Lhotský
Abstract The present field study describes a pilot remediation test of calcium
peroxide, modified calcium peroxide, and gelatinous hydrogen peroxide as oxygen
sources to enhance mono-aromatic solvents in situ biodegradation. The field study
was carried out in well permeable aquifer contaminated mainly by benzene, toluene,
and chlorobenzene. Three different Oxygen Release Compounds (ORCs) were
injected near three different monitoring wells situated in the center of the contamination plume. The injections were performed via direct push top-down method.
Each oxygen source tested was injected into two direct push probes in close vicinity
of respective monitoring well. Membrane interface probe (MIP) investigation was
utilized for targeting of the oxygen sources injections into most contaminated layers
in the subsurface. Although there was a high heterogeneity of the conditions
prevailing in the respective injection areas, it can be stated that the injection of all
the materials enhanced the in situ biodegradation and led to significant drops in the
concentrations of the contaminants. Therefore, in situ biodegradation without
bioaugmentation can be considered a feasible method for the clean-up of the
tested site.
Keywords Biodegradation · ORC · Direct-push · MIP
19.1 Introduction
Mono-aromatic solvents (e.g., BTEX and monochlorobenzene) are widespread
groundwater and soil contaminants (Kao et al. 2006; Nijenhuis et al. 2007) and
their presence in the environment often poses a threat to both human health and
O. Lhotský (*)
DEKONTA a.s., Prague, Czech Republic
Institute for Environmental Studies, Faculty of Science, Charles University, Prague, Czech
Republic
e-mail: lhotsky@dekonta.cz
© Springer Nature Switzerland AG 2020
J. Filip et al. (eds.), Advanced Nano-Bio Technologies for Water and Soil Treatment,
Applied Environmental Science and Engineering for a Sustainable Future,
https://doi.org/10.1007/978-3-030-29840-1_19
411