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文獻名：Peroxymonosulfate activation through LED-induced ZnFe2O4 for levofloxacin degradation

 

 

作者：Yiwen Zhong^a, Kaimin Shih^d, Zenghui Diao^c, Gang Song^a, Minhua Su^a, Li'an Hou^a, Diyun Chen^a, Lingjun Kong^ab 

 

 

摘要：Recently, a lot of attentions were paid on sulfate (SO₄^-?) and hydroxyl (?OH) radicals-based advanced oxidation processes in degradation of fluoroquinolone antibiotic due to their favorable oxidation potential. This work reported an integrated peroxymonosulfate (PMS) activation process by coupling ZnFe₂O₄ (ZFO) with energy-saving LED for degradation and defluorination of levofloxacin (LEV). The LEV degradation efficiency reached 88.52 % within 180 min in the ZFO-500/LED/PMS system, which was higher than those of other activation systems. Both SO₄^-? and ?OH were generated in the integrated ZFO-500/LED/PMS system by the photo-generated electrons and holes activation of PMS under the LED irradiation. The recombination of photo-generated electrons and holes was reduced. Plenty of ?O₂^– and ¹O₂ were produced contributing to LEV degradation. The possible degradation pathways and mechanisms were proposed. This study presented a promising LED-assisted PMS activation process by ZnFe₂O₄ for antibiotic degradation.

 

關(guān)鍵詞：ZnFe₂O_4;Peroxymonosulfate;Levofloxacin;LED