采用连续运行的TiO2转盘光催化反应器（RDPR），在近紫外（UV）辐射下研究了二氧化钛（TiO2）辅助光催化降解水中的4-氯苯甲酸（4-CBA）和甲基叔丁基醚（MTBE）。实验在pH=3.0和不同浓度的过氧化氢（H2O2）作为补充电子受体下进行。当进水浓度约为310μmol 4-CBA/L时，进水H2O2的最佳浓度约为50 mg/L，这导致出水H2O2浓度较低，最大浓度为4- CBA降解和矿化率。当进水中的H2O2浓度超过50 mg/L时，其出水浓度显著增加，4-CBA降解率、溶液中游离Cl-释放率和总有机碳（TOC）矿化率相应降低。以类似的方式，添加浓度为1.3-1.5 mg/L的MTBE的降解和矿化率随着H2O2添加至50 mg/L的浓度而提高。在较高的进水H2O2浓度下，MTBE的降解和矿化率受到抑制。 发现MTBE通过光催化途径降解，包括生成甲酸叔丁酯、叔丁醇和乙酸甲酯。少量添加H2O2的有益效果归因于有助于形成更高浓度羟基自由基的反应。另一方面，抑制作用归因于自由基反应，在高浓度H2O2下，自由基反应导致羟自由基清除。本研究证明，如果在反应液中加入适量的过氧化氢，它可以是一种有益的添加剂。 在进水流中大量添加过氧化氢有害，同时会增加过氧化氢成本。包括19个参考文献、表格和图表。

Titanium dioxide (TiO2)-assisted photocatalytic degradation of 4-chlorobenzoic acid (4-CBA) and methyl tert-butyl ether (MTBE) in water was investigated at near-ultraviolet (UV) radiation using a TiO2-rotating disk photocatalytic reactor(RDPR) operated in a continuous mode. Experiments were performed at pH=3.0 and at different concentrations of hydrogen peroxide (H2O2) as a supplemental electron acceptor. At an influent concentration of approximately 310 umol 4-CBA/L, theoptimum influent H2O2 concentration was about 50 mg/L which resulted in low effluent H2O2 concentrations and maximum 4-CBA degradation and mineralization rates. As the concentrations of H2O2 in the influent surpassed 50 mg/L, itseffluent concentration increased considerably with a corresponding reduction in the rates of 4-CBA degradation, free Cl- release in the solution, and total organic carbon (TOC) mineralization. In a similar manner, the degradation and mineralization rates of MTBE added in concentrations of 1.3-1.5 mg/L improved with H2O2 addition up to a concentration of 50 mg/L. At higher influent H2O2 concentrations, the degradation and mineralization rates of MTBE were inhibited. MTBE was found to degrade via a photocatalytic pathway that includes the formation of tert-butyl formate, tert-butyl alcohol, and methyl acetate. Thebeneficial effect of H2O2 added in small quantities was attributed to reactions which contributed to the formation of higher concentrations of hydroxyl radicals. On the other hand, the inhibition effect was attributed to radical reactions which lead to hyroxyl radical scavenging at high concentrations of H2O2. This study proved that H2O2 can be a beneficial additive if it is added in appropriate quantities in the reaction liquid. Addition of large quantities in the influent stream is detrimental with a simultaneous increase in the hydrogen peroxide cost. Includes 19 references, tables, figures.