多孔富铁组合填料化学除磷的化学动力学分析

研究了多孔富铁组合填料的动力学因素对化学除磷的影响，并通过化学除磷机理分析建立了化学动力学模型。实验结果显示，组合填料的粒径、配比、投加量及反应时间会对磷的去除效果产生显著影响，除磷优化条件为：组合填料粒径为1.25~1.6 mm，配比为1：2，投加量为3.0 g，反应时间为60 min；在此条件下当进水总磷浓度为5.00 mg·L-1时，出水总磷浓度不大于0.5 mg·L-1。化学动力学分析表明，多孔富铁组合填料化学除磷速率对磷的浓度呈一级反应动力学模型。

Chemical kinetics of chemical phosphorus removal of porous iron-rich combined packing

In this experiment, the influence of the kinetic factors of porous iron-rich combined packing on chemical phosphorus removal was investigated. A chemical kinetics model was built via analysis of the mechanism of chemical phosphorus removal. The experimental results indicate that the particle size of the combined packing, ratio, dosage, and reaction time significantly influence phosphorus removal. The optimal conditions for chemical phosphorus removal using combined packing are as follows:A packing particle size of 1.25 to 1.6 mm, porous iron-rich packing/zeolite ratio of 1:2, dose of 3.0 g, and reaction time of 60 min. When the influent TP is 5.00 mg·L-1, the effluent TP is less than 0.5 mg·L-1 under optimal conditions. Analysis of the chemical kinetics show that the rate of chemical phosphorus removal using porous iron-rich combined packing follows a first-order reaction kinetics model with respect to the phosphorus concentration.