【摘要】 采用芬顿氧化工艺降解水中污染物甲基叔丁基醚（MTBE）,使用Box-Behnken设计方法进行实验设计,基于响应面分析考察了MTBE初始浓度、H₂O₂浓度、Fe²⁺浓度、反应时间和pH等条件对MTBE降解率的影响,对反应条件进行了优化。结果表明,在MTBE初始浓度1.1 mmol·L^-1、H₂O₂浓度18.0 mmol·L^-1、Fe²⁺浓度3.0 mmol·L^-1、反应时间20 min、溶液pH=3.0时,MTBE降解率高达99.3%,与模型预测结果较接近,表明模型具有较好的模拟和预测能力。MTBE芬顿氧化过程检出了乙酸甲酯、叔丁醇和丙酮等中间产物,推测其主要降解过程有两种途径:一是在甲氧基上发生反应,生成甲酸叔丁酯、叔丁醇和丙酮;二是在甲基上发生反应,生成乙酸甲酯和丙酮。更多还原

【Abstract】 Fenton oxidation process is applied for methyl tert-butyl ether（MTBE） degradation. The experimental design is established by Box-Behnken design method（BBD） of response surface methodology（RSM）, where influencing factors, namely MTBE initial concentration, H₂O₂ concentration, Fe²⁺ concentration, reaction time and solution pH are fitted. Optimized results show that at initial concentration 1.1 mmol·L^-1, H₂O₂ concentration 18.0 mmol·L^-1, Fe²⁺ concentration 3.0 mmol·L^-1 reaction time 20 min and pH of 3.0, the degradation rate of MTBE reaches 99.3%, which is consistent with prediction, indicating good simulation and a forecasting model. Intermediates, namely methyl acetate, tert-butanol and acetone are detected during degradation. Thus it is speculated that there are two main pathways. One occurs on the methoxy group producing tert-butyl formate, tert-butyl alcohol and acetone; the other is on the methyl group, producing methyl acetate and acetone.更多还原