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SELPAXT

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Advanced PFAS removal for complex water

 SELPAXT is Chromafora's patented PFAS concentration technology for demanding water streams.

Proprietary selective chemistry combines with ultrafiltration to remove long-, short- and ultra-short-chain PFAS, concentrating them into a small residual stream for further treatment or destruction.

Designed for the PFAS that are hardest to remove

Conventional adsorption technologies – such as activated carbon or ion exchange – can struggle with shorter PFAS compounds, and gradually lose capacity as their media becomes saturated.

SELPAXT takes a different approach. Selective chemistry binds PFAS before separation by ultrafiltration, and the system regenerates automatically rather than relying on a fixed bed of media that wears out – enabling continuous treatment across a broad range of PFAS chain lengths.

How SELPAXT works

SELPAXT is based on Surfactant-Ligand Assisted Membrane Filtration (SAMF).

Proprietary chemistry selectively interacts with PFAS in the incoming water. The PFAS-containing structures are then separated using optimised ultrafiltration membranes.

Automatic regeneration enables continuous treatment, while remote monitoring helps maintain stable performance over time.

The SELPAXT process

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Why SELPAXT?

Long, short
and ultra-
short PFAS

Removes PFAS across a broad range of chain lengths, including compounds that are challenging for conventional treatment technologies.

Minimal
residual
waste

Concentrates PFAS by up to 1,000x, corresponding to a residual waste volume of approximately 0.1% under appropriate operating conditions.

Built for complex
water

Designed for demanding streams with high PFAS concentrations and low sensitivity to TOC and pH variation.

Continuous
and reliable operation

Automatic regeneration and remote monitoring support reliable, uninterrupted treatment.

SELPAXT. 
Advanced PFAS removal

For the most demanding PFAS challenges – including long-, short- and ultra-short-chain compounds – SELPAXT combines proprietary chemistry with ultrafiltration, concentrating PFAS into a residual stream as small as 0.1% of the treated volume.

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EXPLORE SELPAXT

PFAS Flocculation.
A simpler way to remove PFAS

For highly contaminated, complex water such as landfill leachate, flocculation offers a practical, lower-cost route to PFAS removal – up to 95%, using equipment your team already knows how to run.

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EXPLORE FLOCCULATION

SELMEXT. 
Selective metal extraction

SELMEXT selectively separates metals from water and hydrometallurgical process streams – removing what's unwanted, recovering what has value. Current development spans gold, uranium, scandium and mercury.

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EXPLORE SELMEXT

We can also offer...

Not every water stream needs a purpose-built selective technology. For simpler polishing needs – or where a conventional method is genuinely the right fit – we also provide granular activated carbon (GAC) and ion exchange (IX) systems, either standalone or as a polishing step after SELPAXT or flocculation.

Granular Activated Carbon (GAC)

A familiar, well-proven adsorption technology for long-chain PFAS – well suited as a polishing step after a primary PFAS-selective treatment stage.

EXPLORE GAC

Ion Exchange
Resins

Higher-selectivity adsorption media that can improve removal of certain short-chain PFAS – offered standalone or integrated into a broader treatment train.

EXPLORE IX

Different challenges. One selective approach.

 

PFAS and metals behave differently in water. That's why our technologies are designed around the specific contaminant, water matrix and treatment objective – combining proprietary chemistry with established separation processes to remove what matters while reducing unnecessary waste.

CONTACT AN EXPERT

Which technology fits your water?

 

PFAS chain length, water chemistry and your discharge target all influence which treatment approach makes sense. The table below summarises how our core technologies – and the additional technologies we also offer – compare on the factors that matter most in complex water streams such as landfill leachate.

Technology

PFAS chain-length coverage

Residual waste

Sensitivity in complex leachate

Best fit

SELPAXT™ (SAMF)

Long, short & ultra-short – up to 99.7% removal demonstrated

Very low – as little as ~0.1% of treated volume

Low sensitivity to TOC and pH swings

High-strength, complex leachate; demanding or tightening discharge limits

PFAS Flocculation

Long- and short-chain – up to 95% removal

Moderate – dewatered sludge for disposal

Can be used to pre-treat high-DOC water

Cost-sensitive sites; pretreatment ahead of a polishing step

Reverse Osmosis

Broad-spectrum, high overall removal

High – 15–30% concentrated reject stream

Prone to fouling from salts, metals and organics

Sites with an established plan for concentrate destruction

Ion Exchange Resins

Long-chain; improved removal of some short-chain PFAS

Low media volume, but regeneration can generate brine/secondary waste

Fouls with high chloride and organic loading

Polishing step, or simpler matrices with lower fouling risk

Granular Activated Carbon

Long-chain; limited affinity for short- and ultra-short-chain PFAS

Spent carbon requiring replacement/incineration

Reduced adsorption efficiency in high-DOC matrices

Polishing step, or simpler streams dominated by long-chain PFAS

 

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