L-酒石酸改性超高交联树脂对邻氨基苯甲酸的吸附性能研究

Study on L-tartaric acid modified hypercrosslinked resin and its adsorption performance on anthranilic acid

以氯甲基化苯乙烯-二乙烯基苯共聚物(CMS)为原料,通过傅克反应(Fridel-Crafts)制备了新型酒石酸改性超高交联树脂,探究了该树脂在废水中对邻氨基苯甲酸的吸附行为以及吸附动力学,比较了改性树脂TCZ-3和商用苯乙烯型共聚体树脂(H-103)的吸附性能。结果表明,具有更多氢键供体的TCZ-3树脂有更强的亲水性,使得其具有最佳的吸附性能,TCZ-3对废水中邻氨基苯甲酸的最大平衡附量是H-103的1.3倍。TCZ-3对邻氨基苯甲酸的等温吸附过程符合Langmuir等温吸附模型,吸附过程符合准一级动力学方程。TCZ-3树脂可以快速高效处理含邻氨基苯甲酸废水,并且能够实现树脂的再生利用,脱附液可以回收部分邻氨基苯甲酸。

Using chloromethylated styrene-divinylbenzene copolymer(CMS) as raw material, a new type of tartaric acid modified hypercrosslinked resin was synthesized through Fridel-Crafts reaction. The adsorption behavior of this new resin to anthranilic acid in wastewater as well as the adsorption kinetics were explored, the adsorption performance of modified resin TCZ-3 and commercial styrene type copolymer resin(H-103) were compared. The results showed that, the TCZ-3 resin with more hydrogen bond donors has stronger hydrophilicity to make it have the best adsorption performance. The maximum equilibrium adsorption capacity of TCZ-3 to anthranilic acid in wastewater was 1.3 times higher than that of the H-103. The isothermal adsorption process of TCZ-3 to anthranilic acid fit Langmuir isothermal adsorption model;and the adsorption process accord with pseudo-first order kinetic equation. TCZ-3 resin could efficiently treat anthranilic acid-containing wastewater, which could realize resin recycling, more than that, partial anthranilic acid could be recovered from the desorption solution.