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(A) GenX adsorption isotherm by IF-20+ (Adsorbent = 100 mg/L; GenX = 0.2–50 mg/L). Lines show fit to Langmuir (red, dashed) and Freundlich (blue, solid) models. (B) Regeneration and reuse of IF-20+. Sorbent = 20 mg, [GenX] = 10 mg/L (20 mL); extraction with 400 mM methanolic ammonium acetate (20 mL). Inset: sorbent = 5 mg, [GenX] = 200 mg/L (5 mL); extraction with 400 mM methanolic ammonium acetate (5 mL). Error bars: standard deviation of 3 experiments.
