School of Science, Xuchang University, Xuchang, 461000, People's Republic of China.
Chongqing Academy of Metrology and Quality Inspection, Chongqing, 401123, People's Republic of China.
Environ Sci Pollut Res Int. 2022 Aug;29(40):61446-61456. doi: 10.1007/s11356-022-20277-z. Epub 2022 Apr 20.
It is significant to explore the advanced oxidation process (AOP) for antibiotic degradation. Herein, a peroxymonosulfate (PMS) activator, SrFeO/SBA-15 (SFS) heterogeneous catalyst, was synthesized by in situ growth of SrFeO on the surface of SBA-15. In SFS/PMS catalytic system, Sr atom provided electrons to Fe(II) ↔Fe(III) ↔Fe(II) redox cycle through Sr-O-Fe bonds for PMS activation. The SFS catalyst could activate PMS to generate a free radical coexistence system, including sulfate radical (SO∙) and hydroxyl radicals (∙OH). The catalyst possessed high catalytic activity and high stability. The degradation efficiency of sulfapyridine (SAD) over the SFS/PMS catalytic system could reach 99.0% after 90 min reaction. After the 5th reuse, the degradation efficiency of SAD was still more than 94.0%, and the phase structure of the catalyst did not alter. The low ion leaching concentration would be more conducive to reuse and avoiding secondary pollution, in comparison to homogeneous catalysts. This catalyst can be widely applied to organic wastewater treatment.-->.
探索抗生素降解的高级氧化工艺（AOP）具有重要意义。在此，通过在 SBA-15 表面原位生长 SrFeO 合成了过一硫酸盐（PMS）活化剂 SrFeO/SBA-15（SFS）多相催化剂。在 SFS/PMS 催化体系中，Sr 原子通过 Sr-O-Fe 键将电子提供给 Fe(II)↔Fe(III)↔Fe(II)氧化还原循环，从而活化 PMS。SFS 催化剂可以激活 PMS 以产生自由基共存体系，包括硫酸根自由基（SO∙）和羟基自由基（∙OH）。该催化剂具有较高的催化活性和稳定性。在 SFS/PMS 催化体系中，磺胺吡啶（SAD）的降解效率在 90 分钟反应后可达到 99.0%。经过第 5 次重复使用后，SAD 的降解效率仍高于 94.0%，且催化剂的相结构没有改变。与均相催化剂相比，较低的离子浸出浓度更有利于重复使用和避免二次污染。这种催化剂可以广泛应用于有机废水处理。
