A series of anionic functionalized polyacrylonitrile fibers were prepared and used to remove cationic dyes from water. The phenolate immobilized fiber (PAN_P(−)F) exhibited excellent adsorption capacities for cationic dyes, among which the best results was obtained for Brilliant cresyl blue (BCB) with color changing of the solution from sapphire to light yellow. Additionally, PAN_P(−)F can selectively remove cationic dyes from dye mixtures containing both anionic and cationic dyes. After acid-base regulating, the highest adsorption capacity of PAN_P(−)F was obtained at pH 10. Moreover, adsorption kinetic illustrated that PAN_P(−)F can achieve half adsorption capacity within 10 mins and follow pseudo-second-order model. The maximum adsorption capacity calculated from isotherms experiments reached 2.306 mmol/g (890.1 mg/g) at 25 °C. The activation energy of the adsorption process was 30.74 kJ/mol indicating that the BCB adsorption process occurs via chemical adsorption. Furthermore, the PAN_P(−)F can be readily separated from solution and reused 10 cycles. Under a continuous flow condition, the BCB concentration can be reduced to 20 ppb at first and remained below 1.69 ppm during the 825 mins adsorption process. At the same time, the removal ratio kept above 98.31%. In general, this novel PAN_P(−)F adsorbent is eco-friendly, highly efficient, selective, reusable, and has great potential for the removal of dyes from industrial wastewaters.

制备了一系列阴离子官能化聚丙烯腈纤维，并将其用于从水中去除阳离子染料。酚盐固定化纤维（PAN _{P（- ）} F）对阳离子染料表现出优异的吸附能力，其中最佳的亮甲酚蓝（BCB）结果是溶液的颜色从蓝宝石变为浅黄色。此外，PAN _{P（- ）} F可以从同时包含阴离子和阳离子染料的染料混合物中选择性去除阳离子染料。酸碱调节后，在pH 10时获得最高的PAN _{P（- ）} F吸附能力。此外，吸附动力学表明PAN _{P（- ）}F可以在10分钟内达到一半的吸附容量，并遵循伪二级模型。根据等温线实验计算得出的最大吸附容量在25°C时达到2.306 mmol / g（890.1 mg / g）。吸附过程的活化能为30.74 kJ / mol，表明BCB吸附过程是通过化学吸附发生的。此外，PAN _{P（- ）} F可以很容易地从溶液中分离出来并重复使用10个循环。在连续流动条件下，BCB浓度可首先降低到20 ppb，并在825分钟的吸附过程中保持低于1.69 ppm。同时，去除率保持在98.31％以上。一般而言，这本新颖的PAN _{P（− ）}F吸附剂是环保的，高效的，选择性的，可重复使用的，并且具有从工业废水中去除染料的巨大潜力。