Perovskites with flexible texture structures and excellent catalytic properties have attracted considerable attention in peroxymonosulfate (PMS) activation for addressing organic contaminants in water. In this study, the role of copper to promote PMS activation performance of LaMnO₃ was investigated. 100% sulfamethoxazole (SMX) degradation and 34% mineralization were achieved over copper doped LaMnO₃ while only 60% SMX was removed without TOC removal by LaMnO₃. Especially, compared with LaMnO₃, the pseudo-first-order reaction rate constant was increased by 8.30 times when the atomic ratio of Cu/Mn was 1:3. It proved that only ¹O₂ was generated in LaMnO₃ while ¹O₂, especially •OH and SO₄•^- were all detected in Cu-LaMnO₃/PMS system. The characterization results showed that Cu induced the formation of LaMnO₃ and La₂CuO₄ heterostructure with enhanced content of relatively low-valence Mn and Cu and abundant oxygen vacancies (OVs). Hence, the efficient PMS activation by Cu-LaMnO₃ was due to regulating the produced reactive oxygen species (ROS). A radical dominant instead of ¹O₂ involved PMS activation mechanism over LaMnO₃-La₂CuO₄ was proposed for efficient degradation of SMX. Finally, the possible degradation pathways of SMX were discussed based on HPLC-MS analysis. This study provided a new insight of improving the catalytic activity of perovskites in PMS activation in water treatment.

具有柔韧性结构和优异催化性能的钙钛矿在过氧单硫酸盐（PMS）活化中引起人们的广泛关注，以解决水中的有机污染物。在这项研究中，研究了铜在促进LaMnO _3的PMS活化性能中的作用。与铜掺杂的LaMnO ₃相比，实现了100％的磺胺甲恶唑（SMX）降解和34％的矿化，而在没有通过LaMnO ₃去除TOC的情况下，仅去除了60％的SMX 。尤其是，与LaMnO ₃相比，当Cu / Mn的原子比为1：3时，拟一级反应速率常数增加了8.30倍。证明LaMnO ₃中仅产生¹ O ₂而¹ Ò ₂，尤其是•OH和SO ₄ • ^-均在铜的LaMnO检测₃ / PMS系统。表征结果表明，Cu诱导了LaMnO ₃和La ₂ CuO ₄异质结构的形成，其中Mn和Cu的含量相对较低，且氧空位（OVs）较高。因此，Cu-LaMnO ₃的有效PMS活化归因于调节产生的活性氧（ROS）。与LaMnO ₃ -La ₂ CuO _4相比，自由基占主导地位而不是¹ O ₂参与了PMS活化机理。提出了有效降解SMX的建议。最后，基于HPLC-MS分析讨论了SMX可能的降解途径。这项研究提供了改善水处理中PMS活化中钙钛矿催化活性的新见解。