Subsurface Multiphase Flow and Contamination Remediation
A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Hydraulics and Hydrodynamics".
Deadline for manuscript submissions: closed (20 May 2020) | Viewed by 19270
Special Issue Editors
Interests: multi-phase flows; groundwater hydrology; vadose zone hydrology; reactive transport; nuclear waste
Special Issues, Collections and Topics in MDPI journals
Special Issue Information
Dear Colleagues,
The accidental release of hazardous hydrophobic organic chemicals including light (L) and dense (D) non-aqueous phase liquids (NAPLs, such as petroleum hydrocarbons and chlorinated solvents respectively) into the subsurface is a significant environmental problem. Depending on their specific gravity, NAPLs form an immiscible liquid plume in the vadose zone and across the capillary fringe (for LNAPLs) or penetrate below the water table (DNAPLs). NAPLs may include hundreds of chemicals with significantly different solubility and volatilization attributes. Partitioning of NAPL compounds into gaseous and aqueous phase alter the physical and chemical characteristics of the gaseous and aqueous phases and the remaining NAPL. Ambient and natural phenomena such as capillary effects, hysteresis, and water table fluctuations can affect the mobility of the NAPL. Trapped or residual NAPL may form in the subsurface and serve as long-term sources of contamination. The interaction of biotic and abiotic processes in the subsurface can alter the mobility, mass, composition, and distribution of the chemicals in the NAPL. Eventually, remediation approaches to remove NAPLs reach their operational endpoints and may leave behind considerable amounts of subsurface contamination. The varied physical and chemical dynamics in the subsurface create complex multiphase, multicomponent, and multiscale issues when addressing subsurface NAPL contamination.
The aim of this Special Issue is to encourage the submission of works focused on various aspects of multiphase multicomponent flow, biotic and abiotic reactions, and multi-phase remediation of NAPLs. We consider theoretical, computational and experimental papers addressing multiphase dynamics and measurement techniques at various scales (pore to Darcy and field scale). Papers addressing natural source zone depletion (NSZD) and the longevity of chemicals in different phases are also encouraged. Site characterization and case studies are considered only if they discuss novel observations and techniques. Papers on single-phase contamination transport and remediation (e.g., pump-and-treat) will not be given a priority.
Dr. Kaveh Sookhak Lari
Dr. Robert J. Lenhard
Guest Editors
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Keywords
- NAPL
- multiphase
- multicomponent
- multiscale
- transport phenomena
- remediation
- vadose zone
- groundwater
- NSZD
- endpoint
- longevity
- modeling
- experiment
- measurement
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