O3/H2O2工艺降解1,2,4-三氯苯的优化设计

考察用不同的氧化剂降解1,2,4-三氯苯（TCB）,3种不同方法对TCB的去除效果存在较大差别,其处理效果依次为：H2O2〈O3〈O3/H2O2。采用响应面法优化O3/H2O2工艺降解TCB的条件。结果表明,TCB初始浓度和H2O2投加量对TCB去除效果影响较大。TCB的降解符合准一级反应动力学规律,最佳降解条件为TCB初始浓度0.3 mg/L,pH=8.13,H2O2投加量0.40 mmol/L,O3转化率75%。在此条件下,TCB的平均去除率为91.5%,与预测值93.1%吻合度较高。

Optimization design of degradation of 1,2,4-trichlorobenzene by O3/H2O2 processes

The influence of different oxidations on the 1,2,4-trichlorobenzene（TCB） degradation was investigated.Obvious differences in treatment efficiency of TCB by the three methods were observed,and the treating effect was following the order of H2O2O3O3/H2O2.Response surface methodology（RSM） was employed for the optimization degradation conditions by O3 /H2O2 processes.The results showed that the initial concentration of TCB and the dosing quantity of H2O2 had a great effect on the removal rate of TCB.The degradation processes was in line with pseudo-first order reaction kinetics and the optimal operating conditions were as follows： TCB initial concentration of 0.3 mg/L,pH=8.13,and H2O2 dosage of 0.40 mmol/L and ozone transform rate of 74.94%.Under these conditions,the average removal rate of TCB was 91.5%,which matched well with the theoretical value of 93.1%.