Synergistic oxygen vacancies and surface hydroxyl groups in NFM@γ-Al2O3 for enhanced catalytic ozonation of refractory organics and phosphorus in swine wastewater
文献类型： 外文期刊
作者： Xiao, Yanchun 1 ; Huang, Jing 1 ; Xu, Qingxian 1 ; Liu, Ruilai 2 ; Yang, Fang 3 ; Xie, Haijiao 4 ;
作者机构： 1.Fujian Acad Agr Sci, Inst Food Sci & Technol, Fuzhou 350003, Peoples R China
2.Wuyi Univ, Fujian Prov Key Lab Ecoind Green Technol, Wuyishan 354300, Peoples R China
3.Chinese Res Inst Environm Sci, Beijing 100012, Peoples R China
4.Hangzhou Yanqu Informat Technol Co Ltd, Hangzhou 310003, Peoples R China
关键词： Swine wastewater; Catalytic ozonation; Complexation; Oxygen vacancies; Surface hydroxyl groups; Biodegradability
期刊名称：SEPARATION AND PURIFICATION TECHNOLOGY （ 影响因子：9.0； 五年影响因子：8.5 ）
ISSN： 1383-5866
年卷期： 2025 年 378 卷
页码：
收录情况： SCI
摘要：
Secondary swine wastewater effluent (SSWE) contains carbon and phosphorus residues, which are challenging to remove using conventional treatment methods owing to its low biochemical oxygen demand (BOD5) to chemical oxygen demand (CODCr) ratio (BOD5/CODCr, <0.001). Catalytic ozonation provides a promising advanced solution to this treatment challenge. In this study, NH4NO3-modified Fe-Mn oxide-loaded gamma-Al2O3 (NFM@gamma-Al2O3) was synthesized and applied for SSWE treatment. Under optimized conditions, the removal efficiencies of CODCr and total phosphorus (TP) reached 86.15 % and 95.98 %, respectively, while wastewater biodegradability improved by a factor of 136.5. Further characterization and density-functional-theory calculations revealed that the efficient co-removal of carbon and phosphorus in the O-3/NFM@gamma-Al2O3 system was driven by the synergistic effects of oxidation and complexation. Singlet oxygen (O-1(2)) and hydroxyl radicals (
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