TY - JOUR
T1 - Use of tracer tests to evaluate the impact of enhanced-solubilization flushing on in-situ biodegradation
AU - Alter, S. R.
AU - Brusseau, M. L.
AU - Piatt, J. J.
AU - Ray-Maitra, A.
AU - Wang, J. M.
AU - Cain, R. B.
N1 - Funding Information:
We thank William Blanford, John McCray, Adria Bodour, Qinhong Hu, Gwynn Johnson, Gale Famisan, Fiona Jordan, and other former UA students for their help. We also would like to thank Lynn Wood and Carl Enfield of the US Environmental Protection Agency for their support. This research was supported by projects funded by the US Environmental Protection Agency, one as part of the Joint Bioremediation Program and one in conjunction with the DOD SERDP program.
PY - 2003/7
Y1 - 2003/7
N2 - Tracer tests were conducted to evaluate the effect of a complexing sugar flush (CSF) on in-situ biodegradation potential at a site contaminated by jet fuel, solvents, and other organic compounds. Technical-grade hydroxypropyl-β-cyclodextrin was used during the CSF study, which was conducted in a hydraulically isolated cell emplaced in a surficial aquifer. In-situ biodegradation potential was assessed with the use of tracer tests, which were conducted prior to and immediately following the CSF study. Ethanol, hexanol, and benzoate were used as the biodegradable tracers, while bromide was used as a nonreactive tracer. The results indicate that the biodegradation of benzoate was similar for both tracer tests. Conversely, the biodegradation of ethanol (23% increase) and hexanol (41% increase) was greater for the post-CSF tracer test. In addition, analysis of core samples collected from within the test cell indicates that the population density of aerobic jet-fuel degraders increased in the vicinity of the injection wells during the CSF. These results indicate that the cyclodextrin flush did not deleteriously affect the indigenous microbial community. This study illustrates that tracer tests can be used to evaluate the impact of remediation activities on in-situ biodegradation potential.
AB - Tracer tests were conducted to evaluate the effect of a complexing sugar flush (CSF) on in-situ biodegradation potential at a site contaminated by jet fuel, solvents, and other organic compounds. Technical-grade hydroxypropyl-β-cyclodextrin was used during the CSF study, which was conducted in a hydraulically isolated cell emplaced in a surficial aquifer. In-situ biodegradation potential was assessed with the use of tracer tests, which were conducted prior to and immediately following the CSF study. Ethanol, hexanol, and benzoate were used as the biodegradable tracers, while bromide was used as a nonreactive tracer. The results indicate that the biodegradation of benzoate was similar for both tracer tests. Conversely, the biodegradation of ethanol (23% increase) and hexanol (41% increase) was greater for the post-CSF tracer test. In addition, analysis of core samples collected from within the test cell indicates that the population density of aerobic jet-fuel degraders increased in the vicinity of the injection wells during the CSF. These results indicate that the cyclodextrin flush did not deleteriously affect the indigenous microbial community. This study illustrates that tracer tests can be used to evaluate the impact of remediation activities on in-situ biodegradation potential.
KW - Bioremediation
KW - Contaminant transport
KW - Ground water quality
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U2 - 10.1016/S0169-7722(02)00203-6
DO - 10.1016/S0169-7722(02)00203-6
M3 - Article
C2 - 12814880
AN - SCOPUS:0037904431
VL - 64
SP - 191
EP - 202
JO - Journal of Contaminant Hydrology
JF - Journal of Contaminant Hydrology
SN - 0169-7722
IS - 3-4
ER -