PlumeStop® Liquid Activated Carbon™

Proven, Fast & Cost-Effective

  • Captures and biodegrades a wide range of contaminants
  • Distributes widely under low injection pressures
  • Biodegrades contaminants in-place
  • Stops contaminant migration and protects sensitive receptors
  • Addresses back-diffusion

RESOURCES

Treatment Solution for Back Diffusion

Breakthrough Treatment for PFAS

Innovative, Concurrent Approach Treats Co-Mingled Plume

The Four PlumeStop Treatment Mechanisms

Dispersion, Sorption, Biodegradation and Regeneration

Dispersion within the Subsurface

PlumeStop is a liquid activated carbon™ material which consists of a very fine suspension of charged particles which resists clumping and has a water-like viscosity. As a result, PlumeStop is easily applied into the subsurface through gravity-feed or low-pressure injection.

Rapid Sorption of Dissolved-Phase Contaminants

Upon reagent injection, target contaminants partition out of the aqueous phase and sorb onto the liquid activated carbon™ matrix, thereby removing mobile contaminants from the immediate risk pathway. Concentration of the contaminants in this manner, in a matrix conducive to degrader colonization and activity, results in a direct increase in efficiency of contaminant destruction.

Biodegradation of Contaminants within the Matrix

Once in place and with contaminants partitioned onto its surface, PlumeStop is colonized by contaminant-degrading bacteria.

Regeneration of Sorption Sites for Long-Term Treatment

Enhanced biodegradation of contaminants within the biomatrix regenerates or frees up sorption sites allowing contaminants to further partition out of the groundwater. This allows a single application of PlumeStop to remain functional for an extended/ indefinite period of time.

Treat Back-Diffusing, Low-Concentration Plumes

PlumeStop technology can be applied to inhibit spreading of contaminant plumes, to protect sensitive receptors, or to prevent contaminant migration across property boundaries. It is also effective tool for control and treatment of groundwater contamination associated with low-permeability porous formations and matrix back-diffusion, promoting diffusion out of the immobile porosity while preventing groundwater impact, and for treating sites with very low contaminant concentrations. Once in place PlumeStop is expected to last for decades with minimal impact on aquifer oxidation-reduction potential, permeability and geochemistry.

Want to learn more about back diffusion? Download the Tech Bulletin here:

Effective In Treating a Wide Range of Contaminants

PlumeStop is effective on most organic groundwater contaminants including hydrocarbons, halogenated compounds, and a wide variety of volatile organic compounds (VOCs) and semi-volatile organic compounds (SVOCs). It is also effective in treating a range of PFAS contaminants (PFOA/PFOS).

Typical Applications

– Liquid-based direct-push injection through hollow rods

– Liquid-based direct-placement into boreholes

– Liquid-based injections in conjunction with Oxygen Release Compound (ORC)to support enhanced aerobic biodegradation

– Liquid-based injections in conjunction with Hydrogen Release Compound (HRC)to support enhanced anaerobic biodegradation

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FAQs about PlumeStop® Liquid Activated Carbon™

PlumeStop® Liquid Activated Carbon™ is a fast-acting groundwater remediation reagent which captures and biodegrades a range of contaminants. PlumeStop accomplishes treatment with the use of a highly dispersible, fast-acting, sorption-based technology which captures dissolved-phase contaminants within its matrix-like structure. Once contaminants are absorbed onto the regenerative matrix, biodegradation processes achieve complete remediation at an accelerated rate.

PlumeStop® is composed of very fine particles of activated carbon (>1-2µm) suspended in a proprietary colloidal fluid through the use of unique organic polymer dispersion chemistry. Once in the subsurface, the material behaves as a colloidal biomatrix binding to the aquifer matrix, removing contaminants from groundwater, and expediting permanent contaminant biodegradation. PlumeStop works in 4 phases: the first is dispersion within the subsurface, the second is rapid sorption of dissolved-phase contaminants, then biodegradation of contaminants within the matrix, and the final phase is regeneration of absorption sites for long-term treatment.

PlumeStop® is right for your project if you are trying to treat organic groundwater contaminants including hydrocarbons, halogenated compounds, a wide variety of volatile organic compounds (VOCs) and semi-volatile organic compounds (SVOCs). PlumeStop is also effective in treating a range of PFAS contaminants (PFOA/PFOS). PlumeStop can be applied to inhibit the spreading of contaminant plumes, to protect sensitive receptors, or to prevent contaminant migration across property boundaries.