NKA-Ⅱ树脂吸附苯甲酸的动力学研究

Study on the Adsoption Kinetics of Benzoic Acid on NKA-Ⅱ Macroporous

研究了NKA-Ⅱ大孔吸附树脂吸附苯甲酸的动力学特性。分别采用一级速率方程、准二级速率方程和二级速率方程对吸附过程进行模拟。结果表明,一级动力学方程的计算值与实验值吻合良好,适合描述NKA-Ⅱ型大孔吸附树脂对苯甲酸的吸附过程,吸附活化能Ea小于3.0 k J/mol。说明NKA-Ⅱ树脂吸附废水中的苯甲酸较容易进行。

The adsorption kinetics characteristics of benzoic acid by NKA Ⅱ macroporous adsorption resin was studied. The first rate equation,the quasi secondary rate equation and second rate equation were used to simulate the process of adsorption. The results showed that the calculated value of the first order kinetics equation was agreed with the experimental value,and it was suitable for describing NKA-Ⅱ macroporous adsorption resin adsorption process of benzoic acid. The adsorption activation energy Ea was less than 3. 0 k J/mol. The NKA Ⅱ resin adsorption of benzoic acid wastewater was easy.