Activation of peroxymonosulfate by graphitized hierarchical porous biochar and MnFe2O4 magnetic nanoarchitecture for organic pollutants degradation: Structure dependence and mechanism

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 中国科学院环境生物技术重点实验室

	Activation of peroxymonosulfate by graphitized hierarchical porous biochar and MnFe2O4 magnetic nanoarchitecture for organic pollutants degradation: Structure dependence and mechanism
	Fu, Haichao ; Ma, Shuanglong ; Zhao, Peng ; Xu, Shengjun ; Zhan, Sihui
刊名	CHEMICAL ENGINEERING JOURNAL
	2019-03-15
卷号	360 页码:157-170
关键词	Cornstalk MnFe2O4 Biochar Peroxymonosulfate Organic pollutants
ISSN号	1385-8947
英文摘要	Three novel graphitized hierarchical porous biochar (MX) and MnFe2O4 magnetic composites (MnFe2O4/MX) have been prepared for degrading organic pollutants by peroxymonosulfate (PMS) activation. MX including MS, ML, MC synthesized using corn stems (S), leaves (L) and cores (C) as raw materials, respectively, possesses hierarchical porous structure, graphitization domains and tremendous surface area. The orange II removal effects of MX and MnFe2O4/MX outperform the corresponding carbonization products, despite that adsorption probably undertakes the major removal efficiency for MX and degradation contributes the most for MnFe2O4/MX. A structure-dependent degradation efficiency is discovered for MX and MnFe2O4/MX, among of which both MS and MnFe2O4/MS present the best removal effect, by electrochemical impedance spectroscopy (EIS) and Xray photoelectron spectroscopy (XPS). The lowest EIS owning to its better balance between graphitization degree and specific surface area and micropore volume of MnFe2O4/MS among MnFe2O4/MX explains its best catalytic activity. The catalytic degradation occurs by the following three ways. First, the radical-induced oxidation is attained by surface-bound center dot SO4- and center dot OH on MnFe2O4 nanoclusters and hierarchical porous carbon nanosheets generated by one-electron reduction of PMS under the participating and coupling of Mn(III)/Mn(II), Fe(III)/Fe (II), O-2/center dot O-2(-), and active sites on carbon surface. Second, non-radical pathway involves the contribution of O-1(2), which is produced in a large quantity by promoted self-decomposition of PMS in presence of MnFe2O4/MS. Third, non-radical pathway is achieved through electron transfer from organic compounds as electron donator to PMS as electron acceptor mediated by graphitization structures. Taking into consideration the excellent degradation performance, easy magnetic separation, and bulk availability of MnFe2O4/MS, this work is expected to pave a new way for precision utilization of corn biomass-based biochar for environmental application.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/43329]
专题	生态环境研究中心_中国科学院环境生物技术重点实验室
作者单位	1.Henan Agr Univ, Collaborat Ctr Innovat Henan Food Crops, Zhengzhou 450002, Henan, Peoples R China 2.Henan Agr Univ, Coll Resources & Environm Sci, Zhengzhou 450002, Henan, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, 18 Shuangqing Rd, Beijing 100085, Peoples R China 4.Nankai Univ, Coll Environm Sci & Engn, Minist Educ, Key Lab Pollut Proc & Environm Criteria, Tianjin 300071, Peoples R China
推荐引用方式 GB/T 7714	Fu, Haichao,Ma, Shuanglong,Zhao, Peng,et al. Activation of peroxymonosulfate by graphitized hierarchical porous biochar and MnFe2O4 magnetic nanoarchitecture for organic pollutants degradation: Structure dependence and mechanism[J]. CHEMICAL ENGINEERING JOURNAL,2019,360:157-170.
APA	Fu, Haichao,Ma, Shuanglong,Zhao, Peng,Xu, Shengjun,&Zhan, Sihui.(2019).Activation of peroxymonosulfate by graphitized hierarchical porous biochar and MnFe2O4 magnetic nanoarchitecture for organic pollutants degradation: Structure dependence and mechanism.CHEMICAL ENGINEERING JOURNAL,360,157-170.
MLA	Fu, Haichao,et al."Activation of peroxymonosulfate by graphitized hierarchical porous biochar and MnFe2O4 magnetic nanoarchitecture for organic pollutants degradation: Structure dependence and mechanism".CHEMICAL ENGINEERING JOURNAL 360(2019):157-170.