Preparation and application of a novel biochar-supported red mud catalyst : Active sites and catalytic mechanism

doi:10.1016/j.jhazmat.2020.124802

CORC > 兰州理工大学 > 兰州理工大学

	Preparation and application of a novel biochar-supported red mud catalyst : Active sites and catalytic mechanism
	Guo, Ziwei 2,3; Bai, Ge 1,3; Huang, Bing 2; Cai, Nan 3; Guo, Pengran 3; Chen, Liang 2
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2021
卷号	408
关键词	Singlet oxygen (O-1(2)) Red mud Biochar Persulfate (PS) Non-radical
ISSN号	0304-3894
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 degrees C) 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 Fe-0 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 Fe-0 and Fe2+ in RM-BC(HP) to produce different radicals, then O-1(2) 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.Y
WOS研究方向	Engineering ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000620383200001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/147409]
专题	兰州理工大学
作者单位	1.Lanzhou Univ Technol, Coll Petrochem Engn, Lanzhou 730000, Peoples R China 2.Kunming Univ Sci & Technol, Fac Environm Sci & Engn, Kunming 650500, Yunnan, Peoples R China; 3.Guangdong Acad Sci, Guangdong Prov Engn Res Ctr Online Monitoring Wat, Guangdong Prov Key Lab Emergency Test Dangerous C, Guangdong Inst Anal,China Natl Analyt Ctr Guangzh, Guangzhou 510000, Peoples R China;
推荐引用方式 GB/T 7714	Guo, Ziwei,Bai, Ge,Huang, Bing,et al. Preparation and application of a novel biochar-supported red mud catalyst : Active sites and catalytic mechanism[J]. JOURNAL OF HAZARDOUS MATERIALS,2021,408.
APA	Guo, Ziwei,Bai, Ge,Huang, Bing,Cai, Nan,Guo, Pengran,&Chen, Liang.(2021).Preparation and application of a novel biochar-supported red mud catalyst : Active sites and catalytic mechanism.JOURNAL OF HAZARDOUS MATERIALS,408.
MLA	Guo, Ziwei,et al."Preparation and application of a novel biochar-supported red mud catalyst : Active sites and catalytic mechanism".JOURNAL OF HAZARDOUS MATERIALS 408(2021).