ABSTRACT

Using NaClO₂ pretreated Calotropis gigantea fiber (CGF) as the bio-template, three N-polymer functionalized fibers were fabricated by in-situ growth of polydopamine (PDA), polyaniline (PAN) and poly(m-phenylenediamine) (PmPD) along the fiber. The resulting adsorbents were applied to remove perfluorooctanoic acid (PFOA) from water. The adsorption process reached equilibrium within 3 h, and the maximum adsorption capacity was 207.3–232.8 mg/g. Electrostatic attraction, hydrogen bond and hydrophobic interaction participated in the adsorption process. Three adsorbents could be well regenerated, and the recovered adsorbents maintained higher adsorption percentage (≥80%) after five adsorption-desorption cycles. Among three adsorbents, PAN-CGF displayed remarkable adsorption performance on perfluorochemicals removal.

摘要

以NaClO ₂预处理的牛角豆纤维（CGF）为生物模板，通过聚多巴胺（PDA）、聚苯胺（PAN）和聚（m ）原位生长制备了三种N-聚合物功能化纤维。-苯二胺）（PmPD）沿纤维。使用所得吸附剂从水中去除全氟辛酸 (PFOA)。吸附过程在3 h内达到平衡，最大吸附量为207.3-232.8 mg/g。静电吸引、氢键和疏水相互作用参与了吸附过程。三种吸附剂可以很好地再生，经过五次吸附-解吸循环后，回收的吸附剂保持较高的吸附率（≥80%）。在三种吸附剂中，PAN-CGF 对全氟化合物的去除表现出显着的吸附性能。