Presentation Date: December 1, 2022
This applied presentation will explain hydro-geo-chemical fundamentals of hydrophobic organic chemical (HOC) behavior including petroleum hydrocarbons, chlorinated solvents, PFAS, and Pesticides, in saturated and unsaturated regimes, from their general physical chemistry characteristics to detailed phase partitioning and sorption (i.e. absorb and adsorb) and interfacial tension, and how these kinetically limit the ‘Availability’ of contamination for remediation. Contaminant sorption and reduced availability can be significantly reduced with integration of surfactant enhanced extraction (SEE) to enhance contaminant phase-desorption (i.e. of vapor, liquids, and solids) and significantly increase their ‘Availability’ for enhanced in-situ physical, biological, and/or chemical remediation.
Two SEE remediation site case studies that each evolved from pilot to full scale applications (Manufactured Gas Plant and Superfund Sites) are presented to provide integration details and the client’s evidence based findings and the statistically measurable benefits realized at each site, using SEE as part of site specific physical, biological, and/or chemical treatment strategies to expedited vapor, soil, and groundwater remediation to achieve regulatory, and/or risk based, clean-up objectives.
The presentation will be technically underpinned by established scientific principles, well supported by site data, figures, tables, and three-dimensional computer animation models for improved audience interaction and understanding.
Lessons Learned: SEE remediation can result in enhancing availability of VOC, Sorbed, globule (ganglia), and NAPL phase contamination for physical, biological, and chemical remediation within combined remediation technology applications to realize synergistic benefits. Benefits also included complete resolution of LNAPL and DNAPL, and significant project life-cycle cost savings to achieve site closure.