Preparation and application of a novel biochar-supported red mud catalystActive sites and catalytic mechanism

doi:10.1016/j.jhazmat.2020.124802

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	Preparation and application of a novel biochar-supported red mud catalystActive sites and catalytic mechanism
	Guo, Ziwei 2,3; Bai, Ge 1,3; B., Huang ; N., Cai ; P., Guo ; L., Chen
刊名	Journal of Hazardous Materials
	2021-04-15
卷号	408
关键词	Hematite Iron metallography Magnetite Mass spectrometry Pyrolysis Rhodium compounds Temperature control Catalyst performance Catalytic mechanisms Degradation pathways High removal rates Hydrothermal treatments Intermediate product Preparation conditions Pyrolysis temperature
ISSN号	03043894
DOI	10.1016/j.jhazmat.2020.124802
英文摘要	A novel catalyst RM-BC(HP) was synthesized by hydrothermal treatment and pyrolysis (800 ) using red mud and coconut shells. Influence of different preparation conditions on catalyst performance was explored. SEM showed that RM-BC(HP) was porous and RM was successfully loaded on the outside surface and inside the pores of BC. XRD revealed that Fe2O3 in RM was reduced to Fe0 and Fe3O4 in the pyrolysis process, in which pyrolysis temperature and addition ratio of coconut shells were critical. TGA-MS, FT-IR and XPS were also applied to character the catalyst. 100% of AO7 was removed within 30 min with conditions of 2 mM PS, 50 mg/L AO7 and 0.5 g/L RM-BC(HP), and the Fe leaching was negligible. High removal rate was obtained in tap, river, and lake water. RM-BC(HP)/PS system also exhibited excellent degradation performance for other dyes (MB, MG and RhB) and antibiotics (TC, OTC and CTC). The mechanism studies demonstrated that PS was mainly activated by Fe0 and Fe2+ in RM-BC(HP) to produce different radicals, then 1O2 was generated by the reactions among these radicals to degrade AO7. Finally, nine intermediate products of AO7 were identified by FT-ICR-MS and a probable degradation pathway was proposed. © 2020 Elsevier B.V.
语种	英语
出版者	Elsevier B.V.
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/147161]
专题	兰州理工大学
作者单位	1.College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou; 730000, China 2.Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming; 650500, China; 3.Guangdong Provincial Engineering Research Center for Online Monitoring of Water Pollution, Guangdong Provincial Key Laboratory of Emergency Test for Dangerous Chemicals, Guangdong Institute of Analysis (China National Analytical Center Guangzhou), Guangdong Academy of Sciences, Guangzhou; 510000, China;
推荐引用方式 GB/T 7714	Guo, Ziwei,Bai, Ge,B., Huang,et al. Preparation and application of a novel biochar-supported red mud catalystActive sites and catalytic mechanism[J]. Journal of Hazardous Materials,2021,408.
APA	Guo, Ziwei,Bai, Ge,B., Huang,N., Cai,P., Guo,&L., Chen.(2021).Preparation and application of a novel biochar-supported red mud catalystActive sites and catalytic mechanism.Journal of Hazardous Materials,408.
MLA	Guo, Ziwei,et al."Preparation and application of a novel biochar-supported red mud catalystActive sites and catalytic mechanism".Journal of Hazardous Materials 408(2021).