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      • Modeling Multi-phase Multi-component LNAPL Dynamics and Recover in the Subsurface

        ( Kaveh Sookhak Lari ),( Greg B Davis ),( John L Rayner ) 대한지질공학회 2019 대한지질공학회 학술발표회논문집 Vol.2019 No.2

        Light non-aqueous phase liquids (LNAPLs), such as petroleum fuels, consist of thousands of compounds that partition and pose risks to different phases and domains. Our intention is to elucidate how multiphase and multicomponent modelling helps better understand the short and long term fate, recovery performance and risks of LNAPL contamination in subsurface media. We report some recent applications and our modifications to TMVOC / TMVOC-MP, to track natural behaviours and remediation strategies for LNAPL soil and groundwater contamination problems. We report studies on LNAPL natural dynamics and partitioning, measurements of soil gas contamination, verifications of modelling complex recovery approaches to determine LNAPL recovery endpoints and computational techniques for optimizing LNAPL remediation. It is shown how complex phenomena such as hysteresis with theoretically unlimited cycles and new constitutive relationships were added to the codes. The cases reported show the criticality of linking multiphase and multicomponent features for LNAPLs. This is key to improved and optimized LNAPL recovery plans, estimation of endpoints associated with different remediation techniques, representative risk assessments and modelling natural source zone depletion (NSZD).

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