Sulfate secondary pollution has always been an inherent problem of peroxymonosulfate-based advanced oxidation processes (PMS-AOPs). In this work, sulfate production is reduced from the source by increasing the PMS utilization rate. A three-dimensionally ordered macroporous perovskite composite material (3DCe@Fe) was synthesized to activate PMS for urotropine (URO) degradation under visible light. 3DCe@Fe shows strong adsorption capacity (When the initial concentration was 100 mg·L, the URO adsorption removal rate reached 34.82 % within 30 min), the adsorption process increases the local concentration and shortens the diffusion path of reactive oxygen species (ROSs), thereby improving the contact efficiency and reducing ROSs quenching, ultimately improving the PMS utilization rate. When the PMS dosage was as low as 0.5 mmol·L, the URO degradation rate and TOC removal rate still reached 93.25 % and 55.38 %, respectively. In addition, the oxygen vacancies on the catalyst surface trigger the formation of singlet oxygen (O), which has low reactivity with inorganic anions, thereby reducing the ineffective consumption of PMS in an environment containing multiple interfering substances. Therefore, in this work, a catalyst with high oxygen vacancy content and strong adsorption capacity was successfully developed, which provided ideas for the green and efficient operation of PMS-AOPs in actual wastewater treatment.

中文翻译：

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富含氧空位的多孔钙钛矿作为光催化剂：减少活性氧猝灭以提高过氧硫酸盐的利用率


硫酸盐二次污染一直是基于过一硫酸盐的高级氧化工艺（PMS-AOP）的固有问题。本工作通过提高PMS利用率，从源头减少硫酸盐产量。合成了三维有序大孔钙钛矿复合材料（3DCe@Fe），以在可见光下激活 PMS 降解乌洛托品（URO）。 3DCe@Fe表现出很强的吸附能力（当初始浓度为100 mg·L时，30 min内URO吸附去除率达到34.82 %），吸附过程增加了局部浓度，缩短了活性氧（ROSs）的扩散路径，从而提高接触效率并减少ROSs猝灭，最终提高PMS利用率。当PMS用量低至0.5 mmol·L时，URO降解率和TOC去除率仍分别达到93.25 %和55.38 %。此外，催化剂表面的氧空位引发单线态氧（O）的形成，单线态氧与无机阴离子的反应活性较低，从而减少了PMS在含有多种干扰物质的环境中的无效消耗。因此，本工作成功开发了一种具有高氧空位含量和强吸附能力的催化剂，为PMS-AOPs在实际废水处理中的绿色高效运行提供了思路。