数字农科院2.0

Efficient degradation of estrogen in dairy farm wastewater using lanthanum ferrite perovskite oxides via cation deficiency regulation to accelerate electron transfer and activate persulfate

文献类型： 外文期刊

作者： 吕诗羽;;原田;;冯梦晗;;伏薇霖;;张薛妍;;付珂蓉;;罗艳丽;;王吉秀;;王风

关键词： Cation defects ;;Perovskite;; Persulfate oxidation ;; β-Estradiol ;; Electron transfer

期刊名称： Advanced Composites and Hybrid Materials

ISSN： 2522-0128

年卷期： 2025 年

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Estrogen is commonly found in dairy farm wastewater, garnering attention owing to its negative impacts on biological health and the environment. Herein, lanthanum ferrite perovskite oxides (LaFeO3) with La defects were synthesized using the sol–gel and hydrothermal methods for efficient persulfate (PMS)-activated degradation of estrogen and other pollutants. Hydrothermally synthesized La0.7FeO3 (H0.7-LFO) was tailored to produce a large amount of O2−, achieving 100% degradation of β-estradiol (β-E2) with an initial concentration of 2 mg/L within 60 min. The associated degradation rate constant was 22.03 times of that for sol–gel-synthesized La0.7FeO3. The considered H-0.7LFO/PMS system exhibited good degradation performance under various conditions, such as the coexistence of different ions, the involvement of humic acid substances, a wide pH range, and multiple reuses, indicating its excellent stability and reusability. When using the H-0.7LFO/PMS system for dairy farm wastewater, the β-E2 degradation capacity reached 82.16–99.25%, indicating notable potential for practical applications. Characterization analysis revealed that introducing La defects reduced the particle size and the number of abundant formed pores within H0.7-LFO. Further, electron transfer compensated for the involved La defect-induced charge imbalance, accelerating the Fe(III)–Fe(II)–Fe(III) redox cycle and enhancing pollutant degradation.

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