摘要
以二氯乙烷为溶剂,Fe Cl3为催化剂,氯球发生Friedel-Crafts反应制备氯质量分数为6.32%的超高交联树脂(简记为GQ-09),将GQ-09树脂进一步用2-氨基吡啶修饰,制备超高交联树脂(简记为GQ-10),研究GQ-10树脂对水杨酸的吸附性能。实验结果表明:GQ-10树脂在p H为2.16时对水杨酸的吸附性能最好;GQ-10树脂对水杨酸的吸附等温线同时服从Langmuir方程和Freundlich方程;与树脂的孔结构对应,GQ-10树脂对水杨酸的吸附在2个时间段均适用准一级速率方程;GQ-10树脂对水杨酸的吸附既有阴离子交换,又存在酸碱作用和疏水作用。GQ-10树脂吸附的水杨酸可用80%乙醇-0.5 mol/L Na OH解吸,解吸率为99.41%。
Dichloroethane was used as solvent and ferric chloride was used as catalyst, and the hyper-cross-linked resin with 6.32% chlorine content（denoted GQ-09） was synthesized with chloromethylated polystyrene by Friedel-Crafts reaction.GQ-09 resin was modified with aminopyridine to achieve the hyper-cross-linked resin with aminopyridine（denoted GQ-10）.The adsorption properties for salicylic acid onto GQ-10 was studied. The results show that the maximum adsorption capacity of salicylic acid onto GQ-10 can be observed at p H of 2.16.The adsorption isotherms of salicylic acid onto GQ-10 can be characterized by both Langmuir equation and Freundlich equation. The pseudo-first-order rate equation can describe the adsorption of salicylic acid onto GQ-10 well if the adsorption process is divided into two stages, which is consistent with the pore structure of GQ-10.Salicylic acid is absorbed onto GQ-10 through anion exchange, acid-base interaction and hydrophobic effect. More than 99.41% regeneration efficiency for GQ-10 is achieved by 80% ethanol-0.5 mol/L Na OH.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2016年第3期724-729,共6页
Journal of Central South University:Science and Technology
基金
湖南省科技计划资助项目(2013WK2008)~~
关键词
2-氨基吡啶
超高交联树脂
水杨酸
吸附
2-aminopyridine
hypercross-linked resin
salicylic acid
adsorption
