Fenton试剂氧化降解水体有机磷酸酯的动力学研究  

A Dynamical Study on Oxidation Degradation of OPEs in Water by Fenton's Reagent

作　　者：刘祖发[1,2] 丁波[1,2] 刘珍珍[1,2] 詹绍君 卓文珊[1,2] 陈记臣 

机构地区：[1]中山大学水资源与环境研究中心,广州510275 [2]华南地区水循环与水安全广东省普通高校重点实验室,广州510275

出　　处：《亚热带资源与环境学报》2016年第1期1-8,共8页Journal of Subtropical Resources and Environment

基　　金：国家自然科学基金项目(21377170)

摘　　要：通过Fenton试剂氧化降解水体有机磷酸酯(包括烷基磷酸酯TBP、卤代烷基磷酸酯TCEP)的一系列实验,探索其氧化降解过程及其动力学特征。结果表明:1)Fenton试剂氧化降解有机磷酸酯遵循一级反应动力学特征,且其降解率与H_2O_2/Fe^(2+)摩尔比、有机磷酸酯初始浓度及反应体系初始pH有关;2)在室温条件下,TBP和TCEP的Fenton试剂最佳降解条件的初始条件pH0为3.0~4.0,[Fe^(2+)]0为40~120μmol·L^(-1),[H_2O_2]0为120~200μmol·L^(-1),该条件下反应10 min后的降解率分别达到96.8%和74.5%;3)TBP氧化降解过程伴随着酸性中间产物的产生使得反应体系pH值的下降并存在矿化过程;TCEP氧化降解过程伴随着脱氯过程。Based on the experiments of Fenton＇s reagent degrades organophosphorus esters （OPEs）, including TBP and TCEP, this study explored mechanisms and processes of Fenton oxidation degrada- tion. Results show that ： 1 ） Fenton oxidation process was efficient to degrade TBP and TCEP, and the degradation of OPEs by Fenton＇s reagent followed the c pH, OPEs and ratio of Fe2＋ and H202, had significan haracteristics of the first order kinetics. Initial t impacts on the oxidation degradation; 2 ） At room temperature, optimal conditions for TBP and TCEP were as follows ： pH0 = 3.0-4.0,[Fe（2＋）]0为40-120μmol·L^（-1）,[H_2O_2]0为120-200μmol·L^（-1）. The removal efficiency at the first 10 min of reaction time were 96. 8% and 74.5% ; 3 ） Fenton oxidation of different OPEs had different charac- teristics, acid intermediate products created and some related mineralization process happened during the Fenton oxidation degradation of TBP, but the dechlorination process happened during the Fenton oxidation degradation of TCEP

关 键 词：有机磷酸酯 FENTON试剂 氧化降解 动力学 

分 类 号：X703.1[环境科学与工程—环境工程]