含三乙烯二胺强弱碱功能基阴离子交换树脂的制备及其吸附性能

含三乙烯二胺强弱碱功能基阴离子交换树脂的制备及其吸附性能;三乙烯二胺; 强弱碱基阴离子交换树脂; 滴定曲线; 苯甲酸; 吸附性能

Preparation and Adsorption Behavior of Strongly-weakly Basic Anion-exchange Resins Including TEDA Groups

A strongly-weakly basic anion-exchange resin was prepared with Triethylenediamine(TEDA) as a amination agent,and the capability of the resin was studied by titration.A comparison study was made on the adsorption behavior for benzoic acid of the resin vs that of the D201 resin and D301R resin,including the(static) and dynamic adsorption behavior.The results indicated that the pH titration curves of the three resins were not affected by temperature.The titration curve of the new resin is between the curves of the strongly-(basic) resin D201 and the weakly-(basic) resin D301R.The amount of benzoic acid adsorbed at equilibrium by this resin was 5.974 451 mmol/g,which was(between) that for D201(8.432 689 mmol/g) and D301R((5.497 871 mmol/g)).At 303 K,the adsorption rate constant of the resin for benzoic acid was(0.030 60 min~(-1)),which was less than that for D201(0.044 89 min~(-1)),and greater than that for D301R(0.026 13 min~(-1)).