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Full-Text Articles in Engineering
On Quantifying Global Carbon Emission From Oil Contaminated Lands Over Centuries, Kaveh Sookhak Lari, Greg B. Davis, Trevor Bastow, John L. Rayner
On Quantifying Global Carbon Emission From Oil Contaminated Lands Over Centuries, Kaveh Sookhak Lari, Greg B. Davis, Trevor Bastow, John L. Rayner
Research outputs 2022 to 2026
Petroleum releases into the subsurface contribute to global soil carbon emissions. Quantifying releases and changes in releases of carbon from soils over the lifetime of a spill is complex. Natural source zone depletion (NSZD) of light non-aqueous phase liquids (LNAPLs) embodies all key mechanisms for transformation to carbon gases and their release from soils including partitioning, transport and degradation of petroleum components. Quantification of the interconnected behaviours of the soil microbiome, fluid flow, multi-component transport, partitioning, and biodegradation is crucial for understanding NSZD. Volatilization from LNAPL, aerobic biodegradation, methanogenesis, and heat production all lead to release of greenhouse gases to …
Quantifying The Benefits Of In-Time And In-Place Responses To Remediate Acute Lnapl Release Incidents, Kaveh S. Lari, Andrew King, John L. Rayner, Greg B. Davis
Quantifying The Benefits Of In-Time And In-Place Responses To Remediate Acute Lnapl Release Incidents, Kaveh S. Lari, Andrew King, John L. Rayner, Greg B. Davis
Research outputs 2014 to 2021
Acute large volume spills from storage tanks of petroleum hydrocarbons as light non aqueous phase liquids (LNAPLs) can contaminate soil and groundwater and may have the potential to pose explosive and other risks. In consideration of an acute LNAPL release scenario, we explore the value of a rapid remediation response, and the value of installing remediation infrastructure in close proximity to the spill location, in effecting greater recovery of LNAPL mass from the subsurface. For the first time, a verified three-dimensional multi-phase numerical framework and supercomputing resources was applied to explore the significance of in-time and in-place remediation actions. A …
Natural Source Zone Depletion Of Lnapl: A Critical Review Supporting Modelling Approaches, Kaveh Sookhak Lari, Greg B. Davis, John L. Rayner, Trevor P. Bastow, Geoffrey J. Puzon
Natural Source Zone Depletion Of Lnapl: A Critical Review Supporting Modelling Approaches, Kaveh Sookhak Lari, Greg B. Davis, John L. Rayner, Trevor P. Bastow, Geoffrey J. Puzon
Research outputs 2014 to 2021
Natural source zone depletion (NSZD) of light non-aqueous phase liquids (LNAPLs) includes partitioning, transport and degradation of LNAPL components. NSZD is being considered as a site closure option during later stages of active remediation of LNAPL contaminated sites, and where LNAPL mass removal is limiting. To ensure NSZD meets compliance criteria and to design enhanced NSZD actions if required, residual risks posed by LNAPL and its long term behaviour require estimation. Prediction of long-term NSZD trends requires linking physicochemical partitioning and transport processes with bioprocesses at multiple scales within a modelling framework. Here we expand and build on the knowledge …
Evaluating An Analytical Model To Predict Subsurface Lnapl Distributions And Transmissivity From Current And Historic Fluid Levels In Groundwater Wells: Comparing Results To Numerical Simulations, Robert J. Lenhard, Kaveh Sookhak Lari, John L. Rayner, Greg B. Davis
Evaluating An Analytical Model To Predict Subsurface Lnapl Distributions And Transmissivity From Current And Historic Fluid Levels In Groundwater Wells: Comparing Results To Numerical Simulations, Robert J. Lenhard, Kaveh Sookhak Lari, John L. Rayner, Greg B. Davis
Research outputs 2014 to 2021
A recent analytical model predicts free, entrapped, and residual LNAPL saturations and the LNAPL transmissivity in the subsurface from current and historic fluid levels in groundwater wells. As such, the model accounts for effects of fluid level fluctuations in a well. The model was developed to predict LNAPL specific volumes and transmissivities from current fluid level measurements in wells and either recorded historic fluid level fluctuations in wells or estimates. An assumption is made in the model that the predictions are not dependent on whether the historic highest or lowest fluid level elevations in a well occur first. To test …