| 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 | |
| 2019-03-15 | |
| Source Publication | CHEMICAL ENGINEERING JOURNAL
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| ISSN | 1385-8947 |
| Volume | 360Pages:157-170 |
| Abstract | 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. |
| Department | 中国科学院环境生物技术重点实验室 |
| Keyword | Cornstalk MnFe2O4 Biochar Peroxymonosulfate Organic pollutants |
| Document Type | 期刊论文 |
| Identifier | https://ir.rcees.ac.cn/handle/311016/43329 |
| Collection | 中国科学院环境生物技术重点实验室 |
| Affiliation | 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 |
| Recommended Citation 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. |
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| Activation of peroxy（5437KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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