The Fluorine Displacement Cascade: Why Textile PFAS Restrictions Shift Pollution Rather Than Eliminate It

Per- and polyfluoroalkyl substances (PFAS) remain a major chemical management challenge in textiles. This critical review asks whether recent restrictions eliminate PFAS burdens or redistribute them across chemicals, places, environmental compartments and time. Drawing mainly on primary studies, agency assessments and regulatory instruments published between 2019 and 2026, it develops the Fluorine Displacement Cascade from three premises: PFAS persistence, the limited jurisdictional reach of market-based rules and the dependence of compliance on what is measured. Together, these premises explain five forms of displacement: chain-length, geographic, compartmental, temporal and end-of-life. Geographic displacement is central because most binding textile rules apply where products are sold, while PFAS application, worker exposure and effluent release occur largely in manufacturing economies with few textile-specific controls. Fluorine-free alternatives are mature for most consumer textiles, although substitution remains difficult for a small group of protective applications. The review therefore proposes an essentiality-substitutability-exposure triage for phase-out and recommends production-side controls, including organic fluorine limits for textile effluent, supply-chain fluorine mass reporting, occupational monitoring and producer-funded end-of-life management. These measures can move PFAS governance beyond market restriction toward verified reduction and elimination.