水体中有机磷酸酯Fenton、电-Fenton的降解特性

Characteristic of the Degradation of OPEs in Water by Fenton and EF-Fenton Process

采用Fenton、电-Fenton高级氧化技术降解水体OPEs(TCEP和TEP),通过系统实验和表观动力学方程的建立,比较、探讨Fenton、电-Fenton降解水体OPEs的特征。主要结论为:(1)在一定条件下,Fenton氧化降解水中OPEs的反应速率和OPEs、H_2O_2以及Fe^(2+)的初始浓度均呈正相关关系;(2)水体中TEP的电-Fenton降解速率受电极初始电位、初始Fe^(2+)浓度以及初始TEP浓度影响,其中电极电位对反应速率的影响更大;(3)与Fenton高级氧化技术相比,电-Fenton对有机物降解更彻底,且能耗低,但反应时间较长;(4)Fenton降解水体TCEP、TEP和电-Fenton降解水体TEP的表观动力学方程分别为γ=10^(0.202 9)P^(1.059 9)F^(1.418 1)H^(0.673 6)、γ=10^(0.817 7)P^(1.081 0)F^(1.155 1)H^(0.510 8)、γ=10^(-1.065 0)P^(1.113 8)V^(1.748 7)。

Advanced oxidation technology like Fenton and EF-Fenton are used to remove organophosphate esters（OPEs）,including TCEP and TEP,in water.A series of system experiments and the establishing of dynamical equations are for the purpose of finding out the characteristic of degradation of OPEs.The main conclusions are as follows：（1）Under certain conditions,it is obviously that the initial concentration of OPEs,H_2O_2 and Fe^（2＋） all have a positive correlativity with the reaction rate of Fenton degrades OPEs in water;（2）The reaction rate of TEP in water by EF-Fenton process is influenced by initial electric potential and the concentration of Fe^（2＋）,TEP.The electric potential has a greater influence;（3）Compared to ordinary Fenton advanced oxidation technology,EF-Fenton has merits like reacting more completely and low energy consumption,but the reaction time is longer;（4）The dynamical equations of TCEP,TEP in water by Fenton process and the TEP in water by EF-Fenton process are：γ=10^（0.202 9）P^（1.059 9）F^（1.418 1）H^（0.673 6）,γ=10^（0.817 7）P^（1.081 0）F^（1.155 1）H^（0.510 8）,γ=10^（-1.065 0）P^（1.113 8）V^（1.748 7）.