摘要：

通过悬浮接枝和熔喷纺丝技术制备的PP-g-（AA-MAH）纤维用于吸附水中苯胺，考察pH、苯胺初始浓度、吸附时间等因素对苯胺吸附效果的影响，并探讨纤维吸附苯胺的机理和再生性能。结果表明，pH对PP-g-（AA-MAH）吸附性能影响较大，pH为7时苯胺吸附量最大，90 min时达到48.3 mg/g。纤维在前45 min对苯胺的吸附速率很快，之后增长减缓。随着苯胺初始浓度升高，苯胺吸附量先增大后趋于平缓。纤维对苯胺的吸附符合准二级动力学模型，吸附等温线符合Langmuir等温吸附模型。纤维中的羧基通过与苯胺发生氢键作用和静电作用吸附苯胺。此外PP-g-（AA-MAH）纤维有良好的再生性能。

关键词: PP纤维, 悬浮接枝, 苯胺, 吸附

Abstract:

PP-g-(AA-MAH) fiber prepared by suspension grafting and melt blown spinning technology was used to adsorb aniline in water. The effects of pH, initial concentration of aniline, adsorption time and other factors on the adsorption of aniline in water were studied. The mechanism and regeneration performance of fiber adsorption of aniline were discussed. The results showed that pH had a great influence on the adsorption performance of PP-g-(AA-MAH). The largest adsorption capacity of aniline at 90 min reached 48.3 mg/g when pH was 7. Adsorption rate of the fiber to aniline was very fast in the first 45 minutes, and then the growth slowed down. The kinetic of adsorption followed the pseudo-second-order model, and the adsorption isotherm was better fitted by the Langmuir isotherm adsorption model. Aniline was adsorbed by carboxyl group in the fiber through two kinds of hydrogen bonding and electrostatic interaction. PP-g-(AA-MAH) fiber had good regeneration performance.

Key words: PP fiber, suspension grafting, aniline, adsorption

中图分类号: 

• X703

• TQ424