PFAS Remediation Technologies: Treatment and Considerations

Innovative Technologies for Effective Treatment

PFAS remediation refers to the treatment, removal, isolation, or destruction of per- and polyfluoroalkyl substances (PFAS) from contaminated media, including soil, groundwater, surface water, drinking water, wastewater, and air. Because PFAS are highly stable and resistant to degradation, remediation requires specialized technologies designed to capture, consolidate, stabilize, or break down these persistent compounds.

Coined “forever chemicals,” per- and polyfluoroalkyl substances (PFAS) are a growing concern due to their resistance to degradation and risk to human health and the environment over time. This concern has increased widespread efforts to develop effective remediation and treatment technologies that mitigate the impact of PFAS by removing or isolating them from the environment. As the need for viable PFAS remediation strategies continues to grow, Langan remains at the forefront of the evolving science, regulations, and solutions—which are yielding some promising results.

Key Takeaways

• PFAS remediation involves capturing, isolating, or destroying persistent “forever chemicals” in soil and water using specialized treatment technologies.
• Established methods like granular activated carbon and ion exchange effectively remove PFAS, but often generate secondary waste streams that require further management.
• Emerging technologies show promise for PFAS destruction, though scalability, energy demands, and long-term performance remain key challenges.
• As regulations evolve and cleanup thresholds tighten, remediation strategies must balance effectiveness, sustainability, and adaptability.

Established PFAS Remediation Technologies

PFAS are remarkably stable in the environment, particularly in water. Activated carbon adsorption has become one of the most widely used water treatment technologies for both the remediation of groundwater and the treatment of wastewater and drinking water. With its high surface area and porous structure, Granular Activated Carbon effectively removes PFAS from contaminated water via surface adsorption; however, it can require frequent regeneration or replacement of the carbon filtration media. Similarly, ion exchange resins have emerged as a viable option for PFAS removal. These anion exchange resins contain positively charged sites that attract and bind negatively charged PFAS molecules, effectively capturing those molecules. While ion exchange adsorbent resins can be tailored to target specific PFAS compounds, making them a versatile solution for various contamination scenarios, the disposal of spent resins remains a challenge and requires further research into sustainable disposal methods.

In soil remediation scenarios, strategies such as excavation and off-site disposal, stabilization, and soil washing may be considered depending on site conditions. However, similar to water treatment technologies, many soil management approaches focus on containment rather than complete PFAS destruction.

Granular Activated Carbon (GAC)

Activated carbon adsorption has become one of the most widely used water treatment technologies for the remediation of groundwater,  wastewater and drinking water. With its high surface area and porous structure, granular activated carbon effectively removes PFAS from contaminated water via surface adsorption. However, GAC systems can require frequent regeneration or replacement of the carbon filtration media as adsorption sites become saturated. 

Ion Exchange Resins

Ion exchange resins have also emerged as a viable option for PFAS removal. These anion exchange resins contain positively charged sites that attract and bind negatively charged PFAS molecules, effectively capturing them. Ion exchange adsorbent resins can be tailored to target specific PFAS compounds, making them a versatile solution for various contamination scenarios. However, the disposal of spent resins remains a challenge and requires further research into sustainable management approaches.

Concentration Technologies (e.g., Foam Fractionation)

Concentration technologies such as foam fractionation are designed to separate and concentrate PFAS from impacted water streams rather than destroy them. Foam fractionation works by using air bubbles to attract and concentrate certain PFAS compounds into a smaller volume for further treatment or disposal. These approaches can help reduce waste volumes and improve treatment efficiency in some applications, though effectiveness may vary depending on PFAS composition and site conditions.

Soil Management and Excavation Strategies

In soil remediation scenarios, strategies such as excavation and off-site disposal, stabilization, and soil washing may be considered depending on site conditions. In some cases, in-place sequestration approaches may also be used to immobilize PFAS within the soil matrix rather than remove contaminated material entirely. These stabilization methods are designed to reduce PFAS mobility and limit the potential for migration into groundwater or surrounding environments. Similar to water treatment technologies, many soil management approaches focus on containment and removal rather than complete PFAS destruction.

Emerging and Innovative PFAS Remediation Methods

Other innovative and less common remediation technologies are gaining traction, including electrochemical oxidation and membrane filtration techniques such as nanofiltration and reverse osmosis. However, the energy requirements and scalability of these technologies require further investigation before they can become go-to methods. Additionally, researchers are in the experimental stage of exploring bioremediation as a potential solution, as certain microorganisms have shown the ability to degrade PFAS under specific conditions.

Challenges in PFAS Remediation

One of the primary challenges in PFAS remediation is that many technologies capture PFAS but do not destroy them. This creates secondary waste streams that must be managed through incineration, stabilization, or other disposal strategies.

When evaluating remedial strategies for PFAS, it is important to consider the waste streams that may be generated because of the remediation and how to manage them effectively. While the available technologies are effective at removing PFAS from groundwater, many do not destroy the forever chemicals, requiring the need for further treatment and/or disposal. It is also important to consider the magnitude of the PFAS impacts that will be treated, as the effectiveness of some remedial technologies is affected by the PFAS concentrations present.

PFAS Capture vs. Destruction Technologies

Most currently deployed remediation systems are designed to capture PFAS from water rather than destroy them. Understanding the distinction between capture and destruction technologies is critical when selecting a remediation strategy.

Capture technologies 

These methods remove PFAS from contaminated media such as groundwater or drinking water but do not break down the compounds themselves. Common examples include granular activated carbon and ion exchange resins, which adsorb PFAS onto filtration media. While effective at removing PFAS from water, these approaches create secondary waste streams that must be managed through disposal or additional treatment.

Destruction technologies

These approaches aim to break the strong carbon–fluorine bond that makes PFAS so persistent in the environment. Emerging methods such as advanced oxidation, plasma treatment, and high-temperature processes are being evaluated for their ability to destroy PFAS rather than simply contain them. However, many of these technologies are still being studied to determine their scalability, cost, and effectiveness in real-world applications.

Regulatory Drivers Influencing PFAS Remediation

Federal and state agencies continue to develop health advisories, maximum contaminant levels (MCLs), and cleanup guidance for PFAS. As regulatory thresholds decrease, remediation technologies must achieve lower detection limits, which may influence system design, treatment selection, and long-term monitoring strategies. As enforceable standards continue to evolve, remediation strategies must be adaptable to meet increasingly stringent cleanup levels.

The Evolving Science of PFAS Remediation

As the science of PFAS remediation rapidly evolves, challenges continue to arise related to each solution’s scalability, sustainability, and ability to destroy PFAS. As new treatment technologies emerge and regulatory expectations shift, PFAS remediation strategies must balance technical feasibility, environmental responsibility, and long-term effectiveness. Ultimately, the key to successfully remediating PFAS constituents is staying abreast of the latest developments while finding creative ways to apply the remedial methods that are available—and Langan is helping clients do just that.

If you’re evaluating PFAS remediation strategies or navigating evolving regulatory requirements, contact Langan to speak with our experts.