铁有机骨架材料对活性橙131染料的吸附动力学

Adsorptive Kinetics for Reactive Orange 131 Dyes on Metal Organic Framework Material

以铁骨架材料作为吸附剂对阴离子染料活性橙131进行恒温吸附,探索影响吸附动力学的实验参数因素。结果表明,铁有机骨架材料对活性橙131的吸附过程符合准2级动力学模型,但活性橙131含量和吸附剂用量是影响平衡吸附量和准2级吸附速率常数的重要因素。对影响平衡吸附量和准2级吸附速率常数的因素数据表明,平衡吸附量随活性橙131的质量浓度增加呈线性增加,而与吸附剂用量之间呈幂函数减少(q_e=(0.346 8 L/g)ρ_0·[ρ(Fe-BDC)/(g·L^(-1))]^(-0.826 8));准2级吸附速率常数随吸附剂用量增加而增大,与活性橙131质量浓度呈幂函数减小(k_2=[0.449 0 L/(min·mg)]·ρ(Fe-BDC)·[ρ_0/(g·L^(-1))]^(-0.951 1))。建立新的吸附参数与实验参数间的方程,以预测不同实验条件下的平衡吸附量和准2级吸附速率常数。

Metal organic framework materials could be used as adsorbent to adsorb anionic dye reactive orange 131, and to research the experimental parameters affecting the adsorption kinetics. The results showed that, the reactive orange 131 adsorption process by metal organic framework materials confirmed to the quasi-second order kinetic equation. But the content of reactive orange 131 and adsorbent dosage affected the adsorption capacity and quasi-second adsorption rate constant, the data of influencing factors indicated that, the adsorption capacity showed a linearly increasing trend with the increased mass concentration of dye, and reduced with an increase of adsorbent dosage by power function(qe=(0.346 8 L/g) ρ0·[ρ(Fe-BDC)/(g·L-1)]-0.826 8).The quasi-second adsorption rate constant increased with the increase of adsorbent dosage, and reduced with an increase of reactive orange 131 mass concentration by power function(k2=[0.449 0 L/(min·mg)]·ρ(Fe-BDC)·[ ρ0/(g·L-1)]-0.951 1). These new equations between adsorption parameters and experimental parameters could be used to predict the adsorption capacity and quasi-second adsorption rate constant in different experimental conditions.