期刊论文

中文

离子交换与吸附

1001-5493

2019

35

1

41-49

10.16026/j.cnki.iea.2019010041

国家自然科学基金(No.51678225).

本校为第一机构

氯甲基聚苯乙烯和2-氨基吡啶发生亲核取代反应,合成2-氨基吡啶修饰的聚苯乙烯树脂(简记为Jx-08),以XAD-4树脂为参照,研究JX-08树脂对水溶液中2,4-D的吸附性能.实验结果表明,JX-08树脂在较宽的pH值范围(pH值在2～11)对2,4-D的吸附量大,XAD-4树脂在pH值小于2时对2,4-D的吸附量大;JX-08树脂对2,4-D的吸附符合Freundlich方程模型,XAD-4树脂对2,4-D的吸附符合Langrnuir方程模型;当2,4-D流出液浓度为上样浓度的1％时,JX-08树脂和XAD-4树脂对2,4-D的吸附量分别为148.2mg/mL和40.Smg/mL.JX-08树脂和XAD-4树脂吸附的2,4-D可分别用6.5BV 2mol/L NaOH和6.5BV C2H5OH解吸.吸附机理表明,XAD-4树脂吸附2,4-D以...

2-Aminopyridine modified polystyrene resin(denoted JX-08)was synthesized by the nucleophile substitution reaction of chloromethylated polystyrene beads and 2-aminopyridine.The adsorption properties of 2,4-D onto JX-08 resin from water were investigated as compared with XAD-4 resin.Results show that large adsorption capacity of 2,4-D onto JX-08 resin is observed at the wide pH range of 2~11 while large adsorption capacity of 2,4-D onto XAD-4 resin is observed when the pH value is less than 2.The adsorption of 2,4-D onto JX-08 resin is fitted to the Freundlich model and endothermic while the ads...