Effect of ion-exchange fiber structure on the binding and release of model salicylates

摘要: Salicylates were used as model anions to evaluate the effect of structure (framework and ion-exchange groups) fibrous anion-exchangers on extent mechanism(s) compound binding release. Binding was affected by physicochemical properties both salicylates fibers. The highest molar amount obtained with most lipophilic salicylate (5-chlorosalicylic acid) weak base (vinylpyridine) anion-exchange However, when capacity taken into account, higher in fibers poly(ethylene) framework compared viscose-based release NaCl solution(s) dependent characteristics fiber bound well extracting ions. With strong (trimethylammonium), viscose released more efficiently than framework. In case fibers, a Calculated equilibrium constants (K) reactions illustrated that addition electrostatic interactions (pure mechanism), non-electrostatic (hydrophobic and/or hydrogen bonding) also involved. modified electrolyte, demonstrating prevalent mechanism.