Abstract:
Three kinds of 2, 4-dichlorophenoxyacetic acid(2, 4-D) surface molecular imprinted polymers(SMIP) were synthesized using 2, 4-D as template, modified chitosan as carrier, methacrylate, acrylamide, and 2-vinyl pyridine as functional monomer, respectively. The synthesized polymers was characterized by FT-IR and SEM. The adsorption performance, adsorption isotherm and adsorption kinetics of these three 2, 4-D surface imprinted polymers were investigated, respectively. Result showed that three polymers had a high adsorption efficiency on 2, 4-D. Moreover, the adsorption isothermal processes for three obtained SMIPs were in accordance with the Langmuir model, and the adsorption kinetics could be better described by pseudo-second-order model. The thermodynamic calculations indicated the adsorption process was spontaneous, endothermic and entropy increasing.
Key words:
surface molecular imprinted polymer,
2, 4-dichlorophenoxyacetic acid,
adsorption,
kinetics
摘要：
以2，4-二氯苯氧乙酸（2，4-D）为模板分子，改性壳聚糖为载体，甲基丙烯酸、丙烯酰胺、2-乙烯基吡啶为功能单体合成了3种2，4-D表面分子印迹聚合物。通过FT-IR和SEM对聚合物进行了表征，考察了3种表面印迹聚合物对2，4-D的吸附性能、吸附等温线和吸附动力学。结果表明，3种表面分子印迹聚合物对2，4-D均具有较好的吸附效果、符合Langmuir方程和准二级动力学方程。热力学分析结果表明，该吸附过程为自发、熵增和吸热过程。
关键词:
表面分子印迹聚合物,
2，4-二氯苯氧乙酸,
吸附,
动力学
CLC Number:
Haijuan Tong,Huixiang Ouyang,Shengyu Chen,Yan Duan,Weiyuan Zuo,Bingfang Shi. Preparation and adsorption performance of 2, 4-dichlorophenoxyacetic acid surface molecular imprinted polymer[J]. Industrial Water Treatment, 2020, 40(5): 76-80.
仝海娟,欧阳辉祥,陈盛余,段艳,左卫元,史兵方. 2，4-二氯苯氧乙酸印迹聚合物的制备及吸附性能研究[J]. 工业水处理, 2020, 40(5): 76-80.