Facile synthesis of sludge-derived MnOx-N-biochar as an efficient catalyst for peroxymonosulfate activation

doi:10.1016/j.apcatb.2019.117765

CORC > 地球环境研究所 > 中国科学院地球环境研究所 > 黄土与第四纪地质国家重点实验室（2010~）

	Facile synthesis of sludge-derived MnOx-N-biochar as an efficient catalyst for peroxymonosulfate activation
	Mian, Md Manik 1,2; Liu, Guijian 1,2; Fu, Biao 1,2; Song, Yu 1,2
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2019-10-15
卷号	255 页码:12
关键词	Sewage sludge MnOx-N-biochar NH4OH activation Peroxymonosulfate Acid orange 7 degradation
ISSN号	0926-3373
DOI	10.1016/j.apcatb.2019.117765
通讯作者	Liu, Guijian(lgj@ustc.edu.cn)
英文摘要	Sewage sludge (SS), the inevitable byproduct of wastewater treatment plants, is facing numerous challenges of environmentally safe and cost-effective disposal. Thus, exploration of efficient SS valorization technique is highly desired. In this study, a sludge derived carbon-supported MnOx as a catalyst (ASMn-Nb) was synthesized through NH4OH activation and pyrolysis (800 degrees C) to enhance peroxymonosulfate (PMS) decomposition and subsequent degradation of acid orange 7 and rhodamine B. The sample characterization indicated that MnCl2 conditioning produces mixed valent Mn oxides on ASMn-Nb, while NH4OH activation significantly enhances N-heteroatoms, surface area, and microporosity. The as-synthesized hybrid catalyst exhibited excellent PMS decomposition ability in a wide range of pH, which enhances AO7 removal efficiency 16%-100% in 40 min compared with that treated with raw sludge biochar. Moreover, the catalyst is recyclable, chemically stable, and produce negligible metal leaching during catalysis. Further investigation of catalytic mechanisms revealed that both radicle and non-radicle processes governing PMS decomposition, whereas mediated electron transfer as the primary and O-1(2), SO4 center dot-, and (OH)-O-center dot radicals induced catalysis as the secondary mechanisms of PMS activation and subsequent AO7 degradation. Finally, a probable mechanism of PMS decomposition over ASMn-Nb and AO7 degradation path is proposed. This study concurrently provides a facile route of improving the catalytic performance of sludge derived-biochar and a probable SS valorization technique.
资助项目	National Natural Science Foundation of China[41173032] ; Key Program for Science and Technology Development of Anhui Province[1804b06020358]
WOS关键词	OCTAHEDRAL MOLECULAR-SIEVE ; METAL-ORGANIC FRAMEWORKS ; SEWAGE-SLUDGE ; CARBON NANOTUBES ; HETEROGENEOUS CATALYSTS ; PHENOL DEGRADATION ; POLLUTANT DEGRADATION ; SULFATE RADICALS ; DOPED GRAPHENE ; RHODAMINE-B
WOS研究方向	Chemistry ; Engineering
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000474501500019
资助机构	National Natural Science Foundation of China ; Key Program for Science and Technology Development of Anhui Province
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/13714]
专题	地球环境研究所_黄土与第四纪地质国家重点实验室（2010~）
通讯作者	Liu, Guijian
作者单位	1.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian 710075, Shaanxi, Peoples R China 2.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Mian, Md Manik,Liu, Guijian,Fu, Biao,et al. Facile synthesis of sludge-derived MnOx-N-biochar as an efficient catalyst for peroxymonosulfate activation[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2019,255:12.
APA	Mian, Md Manik,Liu, Guijian,Fu, Biao,&Song, Yu.(2019).Facile synthesis of sludge-derived MnOx-N-biochar as an efficient catalyst for peroxymonosulfate activation.APPLIED CATALYSIS B-ENVIRONMENTAL,255,12.
MLA	Mian, Md Manik,et al."Facile synthesis of sludge-derived MnOx-N-biochar as an efficient catalyst for peroxymonosulfate activation".APPLIED CATALYSIS B-ENVIRONMENTAL 255(2019):12.