SURFAC® is a patented process that combines the elements of dual-phase / multi-phase extraction (DPE/MPE) with surfactant flushing. This technology targets sites with light non-aqueous phase liquids (LNAPLs), dense non-aqueous phase liquids (DNAPLs), and/or high concentrations of their dissolved constituents. This surfactant enhanced aquifer remediation technique incorporates the use of proprietary non-ionic, non-toxic and biodegradable surfactants to mobilize and/or solubilize LNAPL and/or DNAPL, which is subsequently “captured” by DPE/MPE. SURFAC® typically requires 80% to 95% less remediation time than more conventional “pump and treat systems” while simultaneously reducing the carbon footprint and energy consumption by approximately 75% compared to traditional surfactant enhanced aquifer remediation approaches.
SURFAC® employs mobile DPE/MPE in advance of the introduction of mobilizing surfactants in order to control the subsurface hydraulic gradient of the site prior to the placement and distribution of the surfactants. The combination of DPE/MPE with surfactant emplacement provides for maximum horizontal and vertical distribution of surfactant while also maximizing direct and undiluted contact with the contaminant and impacted media. Our ability to control the subsurface hydraulic gradient enhances the effectiveness of surfactant placement, thereby improving their economical use.
High pressure injection, which is used by our competitors and can result in displacement of the contaminant plume and/or uncontrolled release of harmful vapors, is not a component of the SURFAC® process.
Surfactants facilitate contaminant removal by two primary mechanisms: first, through enhancing the mobility of the contaminant by reducing interfacial tension; and secondly by increasing contaminant solubility. Contaminant mobility, increased by interfacial tension reduction, allows the LNAPL or DNAPL to flow more readily through the subsurface geologic media. Contaminant solubility will also increase by the formation of micro-emulsions. Following surfactant injection (generally within 16 to 48 hours) DPE/MPE is utilized to “capture” the mobilized contaminant, surfactant, and the micro-emulsions formed during this process. Aerobic biodegradation may also be enhanced during the SURFAC® process, as surfactants are considered a co-metabolite to aerobic hydrocarbon digesting microbes.
Contact RECON today for an applicability assessment of this SURFAC® at your site today!