Flower-like bentonite-based Co3O4 with oxygen vacancies-rich as highly efficient peroxymonosulfate activator for lomefloxacin hydrochloride degradation

被引:29
|
作者
Zhu, Youlian [1 ]
Wei, Guangtao [1 ,2 ]
Ma, Jiahao [1 ]
Zhang, Linye [1 ,3 ]
Xu, Chen [1 ]
Huang, Yu [1 ]
Xu, Dingyi [1 ]
机构
[1] Guangxi Univ, Sch Chem & Chem Engn, Nanning 530004, Peoples R China
[2] Guangxi Key Lab Proc Nonferrous Met & Featured Mat, Nanning 530004, Peoples R China
[3] Guangxi Key Lab Biorefinery, Nanning 530007, Peoples R China
关键词
Cobalt oxide; Peroxymonosulfate; Flower-like; Oxygen vacancy; Advanced oxidation process; PHOTOCATALYTIC ACTIVITY; AQUEOUS-SOLUTION; HETEROGENEOUS ACTIVATION; WASTE-WATER; OXIDATION; REMOVAL; SULFATE; COMPOSITES; PERSULFATE; PRODUCTS;
D O I
10.1016/j.cej.2022.140673
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In this work, a flower-like structure and oxygen vacancies (OVs) enriched bentonite-based Co3O4 (Co3O4/Bent) was successfully prepared, and then was applied as a new activator of peroxymonosulfate (PMS) to degrade lomefloxacin hydrochloride (LOMH). The characterization results demonstrated that Co3O4/Bent had a flower-like structure, high Co(II)/Co(III) ratio and high OVs content. The optimal composite of Co3O4/Bent held a high catalytic activity in LOMH degradation, and approximately 87.2 % of LOMH (30 mg/L) could be degraded at 60 min by using Co3O4/Bent (0.2 g/L) to activate PMS (3.0 mmol/L). And the quenching experiments revealed that O-1(2), center dot OH, SO4 center dot- and center dot O-2(-) were the active species and O-1(2) played a main role in the LOMH degradation process. The possible degradation pathways were revealed based on DFT calculation and LC-MS analysis. This work suggested that the Co3O4/Bent composite was an efficient catalyst to activate PMS to treat LOMH in wastewater.
引用
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页数:15
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