{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,7]],"date-time":"2026-09-07T09:08:28Z","timestamp":1788772108306,"version":"build-2803163510"},"reference-count":18,"publisher":"MDPI AG","issue":"17","license":[{"start":{"date-parts":[[2026,9,5]],"date-time":"2026-09-05T00:00:00Z","timestamp":1788566400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>Background: Perfluorooctane sulfonate (PFOS) is a globally recognised persistent, bioaccumulative and toxic pollutant. Under China GB 5749-2022 and the US EPA 2024 drinking water MCL, permissible levels have fallen to 40 ng L\u22121 and 4 ng L\u22121, respectively, placing unprecedented demands on remediation technologies. Methods: An iron(III)\u2013carboxylate metal\u2013organic framework prepared from low-cost precursors (denoted MOF-LC, [Fe3O(BDC)3Cl]\u00b7x(solvent)) was synthesised via a one-pot solvothermal route from FeCl3\u00b76H2O and terephthalic acid (H2BDC). The material was characterised by PXRD, N2 adsorption, FTIR, TGA, XPS, elemental analysis and ICP-OES. Adsorption performance was evaluated under varying initial concentrations, contact times, pH values, coexisting inorganic anions (Cl\u2212, NO3\u2212, SO42\u2212, HCO3\u2212, PO43\u2212) and humic acid backgrounds, and by a panel of six water matrices. Results: MOF-LC exhibited a BET surface area of 1528 m2 g\u22121 and a dominant pore centred at 1.9 nm, which is geometrically compatible with the 1.36 nm molecular length of PFOS. Adsorption reached \u224895% of equilibrium capacity within 30 min and was best described by the pseudo-second-order model (R2 = 0.998). Measured uptake reached 800.6 mg g\u22121 at 298 K, corresponding to a Langmuir maximum capacity of 802 mg g\u22121 (note that all adsorption experiments were conducted at mg L\u22121 concentrations, several orders of magnitude above the regulatory limits cited above). Removal exceeded 88% across all six water matrices. PFOS removal efficiency fell from 99.2% to 85.8% over seven adsorption\u2013regeneration cycles using a 1% NH4Cl\/methanol eluent, with 90.6% of the initial BET surface area retained and Fe leaching below 45 \u00b5g L\u22121. Conclusions: Electrostatic, hydrophobic and pore confinement contributions are proposed as cooperative interpretations consistent with the observations. MOF-LC is identified as a technically promising laboratory-scale sorbent for PFOS removal from complex water matrices. Performance at environmentally relevant ng L\u22121 concentrations and economic viability at scale remain to be established.<\/jats:p>","DOI":"10.3390\/polym18172171","type":"journal-article","created":{"date-parts":[[2026,9,7]],"date-time":"2026-09-07T08:07:06Z","timestamp":1788768426000},"page":"2171","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Rapid and Reversible Capture of PFOS from Complex Water Matrices by an Earth-Abundant Iron(III)\u2013Carboxylate Metal\u2013Organic Framework"],"prefix":"10.3390","volume":"18","author":[{"given":"Haoming","family":"Yang","sequence":"first","affiliation":[{"name":"School of Safety Science and Engineering, Nanjing Tech University, Nanjing 211816, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"conceptualization","vocabulary":"credit"},{"role":"investigation","vocabulary":"credit"},{"role":"visualization","vocabulary":"credit"},{"role":"methodology","vocabulary":"credit"},{"role":"resources","vocabulary":"credit"},{"role":"supervision","vocabulary":"credit"},{"role":"writing-original-draft","vocabulary":"credit"},{"role":"writing-review-editing","vocabulary":"credit"}]},{"given":"Yuan","family":"Yu","sequence":"additional","affiliation":[{"name":"School of Safety Science and Engineering, Nanjing Tech University, Nanjing 211816, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"conceptualization","vocabulary":"credit"},{"role":"investigation","vocabulary":"credit"},{"role":"visualization","vocabulary":"credit"},{"role":"writing-original-draft","vocabulary":"credit"},{"role":"writing-review-editing","vocabulary":"credit"}]}],"member":"1968","published-online":{"date-parts":[[2026,9,5]]},"reference":[{"key":"ref_1","first-page":"6413","article-title":"Research progress on adsorption removal technology of PFAS in water","volume":"43","author":"Wang","year":"2023","journal-title":"China Environ. 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