Persistent activation of peroxymonosulfate by MoS2@FeOOH/ceramsite composite for continuous flow degradation of sulfamethoxazole
彭琳 1李春全 1张欣超 1袁方 1王诗旋 1王建兵 1徐龙华 2孙志明1
扫码查看
点击上方二维码区域，可以放大扫码查看
作者信息
1. School of Chemical and Environmental Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China
2. Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education,Southwest University of Science and Technology,Mianyang 621010,China
Within the realm of wastewater treatment,the restrictions of inter-particle agglomeration and difficulty in recovery of traditional powder materials greatly limited their large-scale application.Hence,a novel combination of hydrothermal method and impregnation enabled the successful loading of MoS2@FeOOH(MF)onto solid waste-derived ceramsite.Then it was employed to remove sulfamethoxazole(SMX)by activating peroxymonosulfate(PMS)under continuous flow conditions.Interestingly,its rough surface and rich void structure provided rich attachment sites for MF using the ceramsite as substrate,and the metal-carrier interaction among FeOOH,MoS2 and ceramsite suppressed the leaching effect of Fe ions.As predicted,the MoS2@FeOOH/ceramsite(MFC)exhibited a higher degradation ratio(83.4%)compared to MoS2(36.7%)and MF(42.9%).The degradation of SMX involved multiple species,including·OH,SO4·-,·O2-and 1O2.Notably,a significant role was observed for the non-radical pathway dominated by 1O2.Furthermore,ten intermediates were detected in the degradation process by LC-MS technique,and five possible degradation pathways of SMX were proposed,and the intermediates were evaluated for toxicity.In summary,the MFC composite has the advantages of good catalytic performance and lower ion leaching rate,exhibiting the promising application prospect in PMS activation for degrading SMX antibiotic wastewater.
万方数据