Start with the problem definition
Before comparing vendor claims, document the actual water, soil, concentrate or spent-media matrix and the objective. Removal, immobilisation and chemical destruction are different outcomes.
Five questions to ask every supplier
- Matrix & target compounds. Which PFAS are present, what are the initial concentrations, and is short-chain behaviour relevant?
- Evidence maturity. Is the result from laboratory, pilot or full-scale operation? What independently reviewed measurements are available?
- Mass balance & residuals. Where does fluorine go? How are brines, resins, carbon, sludges, off-gases and by-products handled?
- Operational fit. What flow rate, water chemistry, energy, pretreatment, downtime and consumables are expected?
- Permit & compliance context. What treatment targets and sampling methods apply in the relevant jurisdiction?
High-level technology comparison
| Pathway | Typical purpose | Important qualification |
|---|---|---|
| Granular activated carbon (GAC) | Adsorption / separation | Performance depends on PFAS properties, water chemistry and bed life; spent media needs management. |
| Ion exchange | Selective adsorption / separation | Resin selectivity, regeneration and spent-media disposal can dominate economics. |
| Nanofiltration / reverse osmosis | Membrane separation | Concentrate requires treatment or disposal; pressure and fouling matter. |
| SCWO and other destruction options | Chemical breakdown of PFAS in defined matrices | Review verified products, fluoride balance, emissions and maturity; claims are not universal. |
| Soil washing / excavation | Reduce or manage PFAS in soil | Creates secondary contaminated streams and site-specific constraints. |
Minimum evidence for a directory entry
Public documentation of a PFAS-specific product, project or service; a reliable source URL; location and application where available; plus clear distinction between the supplier's claim and an independent result. Inclusion is not an endorsement.
Editorial principle: absence of data does not imply poor performance, and a supplier's marketing claim is not the same as independent validation.
Source references
Educational comparison only; not site-specific engineering, health, regulatory or procurement advice. Review updated official guidance and consult qualified specialists before selecting treatment.