Degradation Mechanism of Tetracycline Using Fe/Cu Oxides as Heterogeneous Activators of Peroxymonosulfate

被引：0

作者：

Li J. ^{[1
]}

Bao J.-G. ^{[1
]}

Du J.-K. ^{[1
]}

Leng Y.-F. ^{[1
]}

Kong S.-Q. ^{[1
]}

机构：

[1] School of Environmental Studies, China University of Geosciences, Wuhan

来源：

Huanjing Kexue/Environmental Science | 2018年 / 39卷 / 07期

关键词：

Degradation mechanism; Fe/Cu oxides; Heterogeneous catalysis; Peroxymonosulfate; Tetracycline(TC);

D O I：

10.13227/j.hjkx.201709227

中图分类号：

学科分类号：

摘要：

A green, highly efficient, and porous copper-ferrite heterogeneous catalyst (Fe-Cu-400) with good magnetism was synthesized via a coprecipitation method. The catalysts were characterized using XRD, BET, FESEM, and EDS. The performance of Fe-Cu-400 as a catalyst was evaluated by activating peroxymonosulfate (PMS) for degradation of tetracycline (TC) in aqueous solution and investigating the influence of several water parameters. The Fe-Cu-400/PMS system showed a greater TC degradation ability, and the degradation rate of TC was enhanced with an increase in the PMS concentration and the initial pH of the coupled Fe-Cu-400/PMS system. Anions including H 2 PO 4 - , HCO 3 - , and Cl - promoted TC degradation, whereas NO 3 - showed a low inhibitory influence. In addition, Fe-Cu-400 exhibited excellent reusability towards activating PMS for TC degradation after five runs of tests. Possible mechanisms of the activation of PMS by Fe-Cu-400 and the main reactive species were proposed based on radical identification tests and XPS analysis. Furthermore, a potential degradation pathway was proposed that included hydrolysis and sequential removal of N-methyl, hydroxyl, and amine functional groups according to the results of LC-MS and TOC detections. © 2018, Science Press. All right reserved.

引用

页码：3203 / 3211

页数：8

共 28 条

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