Spatial Variability of Non-Aqueous Phase Liquid Chemicals in Soil--Implications for Source Zone Mass Estimates

2003 ◽  
Vol 9 (1) ◽  
pp. 19-23 ◽  
Author(s):  
S. FEENSTRA
Keyword(s):  
Spatial Variability ◽  
Aqueous Phase ◽  
Source Zone ◽  
Phase Liquid

scholarly journals Unravelling Microbial Communities Associated with Different Light Non-Aqueous Phase Liquid Types Undergoing Natural Source Zone Depletion Processes at a Legacy Petroleum Site

Water ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 898
Author(s):  
Melanie C. Bruckberger ◽  
Deirdre B. Gleeson ◽  
Trevor P. Bastow ◽  
Matthew J. Morgan ◽  
Tom Walsh ◽  
...  
Keyword(s):  
Microbial Community ◽  
Microbial Communities ◽  
Aqueous Phase ◽  
Large Population ◽  
Microbial Community Composition ◽  
Natural Source ◽  
Source Zone ◽  
Soil Cores ◽  
Phase Liquid ◽  
Natural Source Zone Depletion

Petroleum contaminants are exposed to weathering when released into environment, resulting in the alteration of their chemical composition. Here, we investigated microbial communities through the soil profile at an industrial site, which was exposed to various petroleum products for over 50 years. The petroleum is present as light non-aqueous phase liquid (LNAPL) and is undergoing natural source zone depletion (NSZD). Microbial community composition was compared to the contaminant type, concentration, and its depth of obtained soil cores. A large population of Archaea, particularly Methanomicrobia and Methanobacteria and indication of complex syntrophic relationships of methanogens, methanotrophs and bacteria were found in the contaminated cores. Different families were enriched across the LNAPL types. Results indicate methanogenic or anoxic conditions in the deeper and highly contaminated sections of the soil cores investigated. The contaminant was highly weathered, likely resulting in the formation of recalcitrant polar compounds. This research provides insight into the microorganisms fundamentally associated with LNAPL, throughout a soil depth profile above and below the water table, undergoing NSZD processes at a legacy petroleum site. It advances the potential for integration of microbial community effects on bioremediation and in response to physicochemical partitioning of LNAPL components from different petroleum types.

Laboratory investigation of flux reduction from dense non-aqueous phase liquid (DNAPL) partial source zone remediation by enhanced dissolution

2008 ◽  
Vol 102 (1-2) ◽  
pp. 17-28 ◽  
Author(s):  
Andrew J. Kaye ◽  
Jaehyun Cho ◽  
Nandita B. Basu ◽  
Xiaosong Chen ◽  
Michael D. Annable ◽  
...  
Keyword(s):  
Laboratory Investigation ◽  
Aqueous Phase ◽  
Source Zone ◽  
Enhanced Dissolution ◽  
Phase Liquid

scholarly journals A Screening Model to Predict Entrapped LNAPL Depletion

Water ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 334
Author(s):  
Elias Hideo Teramoto ◽  
Hung Kiang Chang
Keyword(s):  
Aqueous Phase ◽  
Jet Fuel ◽  
Source Zone ◽  
Saturated Zone ◽  
Depletion Rate ◽  
Benzene Toluene ◽  
Phase Liquid ◽  
Time Required ◽  
Dissolved Phase ◽  
Btex Compounds

Accidental leakage of hydrocarbons is a common subsurface contamination scenario. Once released, the hydrocarbons migrate until they reach the vicinity of the uppermost portion of the saturated zone, where it accumulates. Whenever the amplitude of the water table fluctuation is high, the light non-aqueous phase liquid (LNAPL) may be completely entrapped in the saturated zone. The entrapped LNAPL, comprised of multicomponent products (e.g., gasoline, jet fuel, diesel), is responsible for the release of benzene, toluene, ethylbenzene, and xylenes (BTEX) into the water, thus generating the dissolved phase plumes of these compounds. In order to estimate the time required for source-zone depletion, we developed an algorithm that calculates the mass loss of BTEX compounds in LNAPL over time. The simulations performed with our algorithm provided results akin to those observed in the field and demonstrated that the depletion rate will be more pronounced in regions with high LNAPL saturation. Further, the LNAPL depletion rate is mostly controlled by flow rate and is less sensible to the biodegradation rate in the aqueous phase.

Remobilization of Residual Non-Aqueous Phase Liquid in Porous Media by Freeze−Thaw Cycles

2011 ◽  
Vol 45 (8) ◽  
pp. 3473-3478 ◽  
Author(s):  
Kamaljit Singh ◽  
Robert K. Niven ◽  
Timothy J. Senden ◽  
Michael L. Turner ◽  
Adrian P. Sheppard ◽  
...  
Keyword(s):  
Porous Media ◽  
Aqueous Phase ◽  
Freeze Thaw ◽  
Phase Liquid

Non-aqueous phase liquid characterization via partitioning tracer tests: a modified Langmuir relation to describe partitioning nonlinearities

1999 ◽  
Vol 36 (1-2) ◽  
pp. 153-165 ◽  
Author(s):  
William R. Wise ◽  
Dongping Dai ◽  
Elizabeth A. Fitzpatrick ◽  
Lalenia W. Evans ◽  
P.Suresh C. Rao ◽  
...  
Keyword(s):  
Aqueous Phase ◽  
Tracer Tests ◽  
Phase Liquid ◽  
Partitioning Tracer

Toluene degradation in a two-phase partitioning bioreactor involving a hydrophobic ionic liquid as a non-aqueous phase liquid

2017 ◽  
Vol 117 ◽  
pp. 31-38 ◽  
Author(s):  
Thi-vi-na Nguyen ◽  
Alfredo Santiago Rodriguez Castillo ◽  
Solène Guihéneuf ◽  
Pierre-François Biard ◽  
Ludovic Paquin ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Aqueous Phase ◽  
Toluene Degradation ◽  
Two Phase ◽  
Phase Partitioning ◽  
Partitioning Bioreactor ◽  
Hydrophobic Ionic Liquid ◽  
Phase Liquid ◽  
Two Phase Partitioning Bioreactor

scholarly journals Magnetic resonance imaging of dense and light non-aqueous phase liquid in a rock fracture

2003 ◽  
Vol 30 (12) ◽  
Author(s):  
Matthew W. Becker ◽  
Matthew Pelc ◽  
Richard V. Mazurchuk ◽  
Joseph Spernyak
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Aqueous Phase ◽  
Rock Fracture ◽  
Resonance Imaging ◽  
Phase Liquid
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