Catalytic activation of different oxidants including peroxymonosulfate (PMS), peroxydisulfate (PDS), hydrogen peroxide (H₂O₂) and ozone (O₃) by MnO₂ for degradation of sulfachloropyridazine (SCP) was investigated and the effects of different crystalline phases of MnO₂ including nanowire α-MnO₂, nanorod β-MnO₂, nanofiber γ-MnO₂, and nanosphere δ-MnO₂ on catalytic ozonation of SCP were also studied. The SCP degradation and total organic carbon removal indicated that the oxidation efficiency of the peroxide oxidants followed an order of O₃/MnO₂ > PMS/MnO₂ > PDS/MnO₂ > H₂O₂/MnO₂. In catalytic ozonation, SCP degradation rate constants of different MnO₂ phases followed an order of δ-MnO₂ > α-MnO₂ > γ-MnO₂> β-MnO₂. Electron paramagnetic resonance (EPR) suggested that hydroxyl radicals (·OH) and singlet oxygen (¹O₂) might be more significant for SCP degradation than sulfate (SO₄^·−) and superoxide (·O₂⁻) radicals. Radical competition experiments demonstrated that ¹O₂ and ·OH contributed to 63.16% and 28.07%, respectively, for the catalytic ozonation of SCP. It was also found that more oxygen vacancies, specific surface area and exposure of MnO₆ edges could facilitate the activation of O₃ for ¹O₂ and ·OH productions and SCP degradation. The degradation pathways of SCP could mainly follow the cleavage of S–C or S–N bond and dechlorination, accompanied by hydroxylation and oxidation.

研究了MnO ₂对包括过氧一硫酸盐（PMS），过氧二硫酸盐（PDS），过氧化氢（H ₂ O ₂）和臭氧（O ₃）的不同氧化剂的催化活化对磺胺氯哒嗪（SCP）的降解作用，并考察了不同结晶相的影响。的MnO ₂包括纳米线α-MnO的₂，纳米棒β-MnO的₂，纳米纤维γ-MnO的₂，和纳米球δ-的MnO ₂上SCP的催化臭氧化也进行了研究。SCP降解和总有机碳去除表明，过氧化物氧化剂的氧化效率遵循O ₃ / MnO ₂  > PMS / MnO的顺序。₂  > PDS / MnO ₂  > H ₂ O ₂ / MnO ₂。在催化臭氧化，不同的MnO SCP降解速率常数₂相，随后的顺序δ-的MnO ₂  >α-MnO的₂  >γ-MnO的₂ >β-MnO的₂。电子顺磁共振（EPR）表明，羟基自由基（·OH）和单线态氧（¹ O ₂）对于SCP降解可能比硫酸盐（SO ₄ ^·−）和超氧自由基（·O ₂ ⁻）更为重要。激进竞争实验表明¹ O ₂·OH对SCP的催化臭氧化作用分别占63.16％和28.07％。人们还发现，更氧空位，比表面积和MnO的曝光₆边缘可以方便的O活化₃为¹ Ò ₂和·OH制作和SCP降解。SCP的降解途径可能主要是通过S–C或S–N键的裂解和脱氯，再伴随有羟基化和氧化。