Forever Chemicals, Permanent Closures?

Maybe Not Anymore

For years we have been told that Polyfluoroalkyl Substances (PFAS) contamination is effectively permanent - that rivers, lakes, estuaries, and groundwater affected by so-called “forever chemicals” are simply lost. The public response has usually been the same: warning signs, fishing bans, swimming advisories, and quiet restrictions on access that are rarely lifted again. Cleanup, we are told, is too slow, too costly, or technically impossible.

A new discovery from Rice University suggests that excuse may no longer hold.

The problem with PFAS

PFAS (per- and polyfluoroalkyl substances) are a family of highly persistent industrial chemicals used in firefighting foams, non-stick coatings, stain repellents, and a range of industrial processes. Their defining feature - extreme chemical stability - is also what makes them such a problem. Once released into the environment they do not readily break down, accumulating in water, sediment, wildlife, and people.

Around the world, PFAS contamination is increasingly being cited as a reason to restrict or close recreational access to water. Swimming holes become “unsafe”. Shellfish beds are closed indefinitely. Fishing advisories quietly harden into de-facto bans. In many cases the contamination source is historic or long since controlled, yet the public pays the price through permanent loss of access.

Why cleanup has stalled

Traditional PFAS treatment methods exist, but they come with serious limitations:

• Activated carbon filters are slow and quickly saturated
• Ion-exchange resins are expensive and generate hazardous waste
• Both methods generally trap PFAS rather than destroy them, shifting the problem elsewhere
• Disposal often involves transport and incineration, with further environmental risk

This has allowed regulators and councils to fall back on a familiar position: managing public exposure rather than fixing the problem.

A different approach

Researchers at Rice University, working with South Korean partners, have developed a new PFAS treatment platform based on a material known as Layered Double Hydroxide (LDH), made from copper and aluminium.

In plain terms, the results are striking:

• The material captures PFAS up to 100 times faster than commercial activated carbon
• It adsorbs PFAS over 1,000 times more effectively than many traditional materials
• Large amounts of PFAS can be removed within minutes, not days or weeks

On its own, that would be a major improvement. But the real breakthrough lies in what happens next.

Closing the loop

Unlike most existing systems, this technology does not stop at capture. Once PFAS are adsorbed onto the LDH material, the researchers apply a controlled heating process using calcium carbonate. This has two critical effects:

• More than half of the captured PFAS are destroyed, rather than merely relocated
• The LDH material is regenerated and reused, reducing waste and cost

Crucially, this process does not release known toxic by-products. Instead of creating a second hazardous waste stream that must be disposed of elsewhere, the system largely neutralises the chemicals on site.

This “one-two punch” - rapid capture followed by on-site destruction - directly challenges the idea that PFAS contamination is something we can only fence off and live with.

Why this matters for recreation and access

For CORANZ, this matters for one central reason: environmental degradation is increasingly being used to justify loss of public access.

We see it repeatedly. Contamination is discovered, often linked to historic industrial or military activity. Rather than investing in meaningful remediation, authorities choose the cheaper, simpler option - restrict use. Over time, those restrictions become normalised. The river is still there, the estuary still flows, but the public is quietly excluded.

This new research undermines the argument that “nothing can be done”. If PFAS can be removed quickly, efficiently, and without creating another toxic legacy, then the policy conversation changes. The question is no longer whether access must be lost, but why restoration is not being pursued.

A note of realism

It is important to be clear: this technology is not yet being deployed at catchment scale. Further work is needed on cost, engineering, and regulatory approval. No single treatment method will magically clean every contaminated waterway.

But the significance of this discovery lies elsewhere. It proves that PFAS are not untouchable. It shows that remediation can be faster, more efficient, and more sustainable than previously claimed. And it removes a long-standing excuse for inaction.

From management to restoration

For too long, environmental policy has drifted toward managing decline rather than reversing it. Warning signs replace cleanup. Barriers replace solutions. Public access is lost not through overt decision-making, but through quiet administrative convenience.

Technologies like this challenge that mindset. They support a different approach - one where contaminated environments are actively restored, and where recreation, conservation, and public health are aligned rather than set against each other.

The real question

If “forever chemicals” can be captured and destroyed, then the remaining obstacle is no longer chemistry - it is will.

Will agencies continue to default to closures and restrictions, or will they invest in solutions that keep rivers swimmable, fisheries accessible, and the outdoors open to everyone?

This research from Rice University suggests that permanent loss of access is not inevitable. The science is beginning to catch up. It is now up to decision-makers to do the same.