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以柠檬醛化学改性壳聚糖,制备柠檬醛交联壳聚糖树脂。采用红外光谱(IR)、X射线衍射(XRD)、扫描电镜(SEM)、比表面测定及孔径分析方法表征柠檬醛交联壳聚糖树脂的结构。在25℃,pH为7条件下,考察柠檬醛交联壳聚糖树脂对3种酞酸酯(PAEs)邻苯二甲酸二甲酯(DMP)、邻苯二甲酸二丁酯(DBP)和邻苯二甲酸2-乙基己酯(DEHP)的吸附性能,剖析吸附机理。研究结果表明,壳聚糖对DMP、DEHP和DBP的吸附容量分别为92、113和87 mg/g,而柠檬醛交联壳聚糖树脂对DMP、DEHP和DBP的吸附容量分别为147、166和190 mg/g,柠檬醛交联壳聚糖树脂对3种PAEs的吸附效果明显提高,吸附动力学均满足一级动力学方程。经吸附剂再生实验,柠檬醛交联壳聚糖树脂对PAEs的脱附率达到96.5%~97.1%,可重复使用。
Using citral chemically modified chitosan, citral crosslinked chitosan resin was prepared. The structure of citral crosslinked chitosan resin was characterized by IR, XRD, SEM, surface area and pore size analysis. The effects of citral crosslinked chitosan resin on the degradation of three kinds of phthalate esters (PAEs), such as dimethyl phthalate (DMP), dibutyl phthalate (DBP) and Adsorption performance of 2-ethylhexyl phthalate (DEHP), analysis of adsorption mechanism. The results showed that the adsorption capacities of chitosan to DMP, DEHP and DBP were 92, 113 and 87 mg / g, respectively. The adsorption capacities of citral crosslinked chitosan resin to DMP, DEHP and DBP were 147 and 166 And 190 mg / g, citral cross-linked chitosan resin adsorption efficiency of three kinds of PAEs increased significantly, the adsorption kinetics are to meet the first-order kinetic equation. Adsorbent regeneration experiments, citral crosslinked chitosan resin PAEs desorption rate of 96.5% to 97.1%, can be reused.