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New insights into the formation and transformation of active species in nZVI/BC activated persulfate in alkaline solutions
Luo, Haoyu1,2; Lin, Qintie1,2; Zhang, Xiaofeng1,2; Huang, Zhuofan1,2; Liu, Shuangshuang1,2; Jiang, Jieru1,2; Xiao, Rongbo1,2; Liao, Xiaoyong3
2019-03-01
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume359Pages:1215-1223
Corresponding AuthorLin, Qintie(qintlin@163.com) ; Liao, Xiaoyong(liaoxy@igsnrr.ac.cn)
AbstractIn this study, a nanocomposite material synthesized by loading nanoscale zerovalent iron (nZVI) onto biochar (BC, gasification plant byproduct) was successfully prepared, and the nZVI/BC5 (mass ratio 1:5) exhibited oxidative resistance, reutilization and stability via COD removal experiments. The nZVI/BC5 nanocomposites was used in persulfate (PS) activation for the synergistic degradation of aromatic pollutants in alkaline waste-water. The nZVI/BC5 selectively adsorbed aromatic pollutants through pi-pi, pi-pi-metal (BCsurface-OFeO) bonding interactions in textile dyeing wastewater (TDWW), and make the free radicals easier to react to aromatic pollutants. FTIR, XPS and EPR analyses showed that some PFRs generated through the reaction between nZVI and the surface functional groups of BC, the other PFRs were transformed from the BCsurface-OFeO species. The chemisorption provided electrons for the BCsurface-O-Fe(III)O- to produce the BCsurface-(O) over dot center dot center dot Fe(II)-O- (persistent free radicals, PFRs). The formation and transformation of the BCsurface-OFeO species were the dominant processes in the radical pathways, they could quickly and sustainably produce SO4 center dot- and center dot OH through heterogeneous catalytic oxidation of water (mediator) and S2O82- (from 0.81 to 0.02 g/L). Finally, a favorable synergistic combined process was initiated via chemisorption and degradation of aromatic pollutants. The BCsurface-OFeO species offer a new understanding of synergistic heterogeneous degradation in alkaline solutions. The byproduct BC could be reused and applied in wastewater pretreatment by this new feasible strategy.
KeywordBiochar PFRs Radical pathways Electron paramagnetic resonance (EPR) Chemisorption
DOI10.1016/j.cej.2018.11.056
WOS KeywordZERO-VALENT IRON ; PERSISTENT FREE-RADICALS ; HETEROGENEOUS FENTON OXIDATION ; WASTE-WATER TREATMENT ; ORGANIC-COMPOUNDS ; DEGRADATION ; BIOCHAR ; REMOVAL ; REDUCTION ; NANOCOMPOSITE
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[21677041] ; National Natural Science Foundation of China[41371317] ; Science and Technology Project of Guangdong Province[2017B020216002] ; YangFan Innovative and Entrepreneurial Research Team Project[2015YT02N012] ; Science and Technology Project of Guangzhou[201604020077] ; Science and Technology Project of Guangzhou[201604030017]
Funding OrganizationNational Natural Science Foundation of China ; Science and Technology Project of Guangdong Province ; YangFan Innovative and Entrepreneurial Research Team Project ; Science and Technology Project of Guangzhou
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
WOS IDWOS:000454137400118
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/51272
Collection中国科学院地理科学与资源研究所
Corresponding AuthorLin, Qintie; Liao, Xiaoyong
Affiliation1.Guangdong Univ Technol, Sch Environm Sci & Engn, Guangdong Ind Contaminated Site Remediat Technol, Guangzhou 510006, Guangdong, Peoples R China
2.Guangdong Univ Technol, Sch Environm Sci & Engn, Equipment Engn Res Ctr, Guangzhou 510006, Guangdong, Peoples R China
3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Luo, Haoyu,Lin, Qintie,Zhang, Xiaofeng,et al. New insights into the formation and transformation of active species in nZVI/BC activated persulfate in alkaline solutions[J]. CHEMICAL ENGINEERING JOURNAL,2019,359:1215-1223.
APA Luo, Haoyu.,Lin, Qintie.,Zhang, Xiaofeng.,Huang, Zhuofan.,Liu, Shuangshuang.,...&Liao, Xiaoyong.(2019).New insights into the formation and transformation of active species in nZVI/BC activated persulfate in alkaline solutions.CHEMICAL ENGINEERING JOURNAL,359,1215-1223.
MLA Luo, Haoyu,et al."New insights into the formation and transformation of active species in nZVI/BC activated persulfate in alkaline solutions".CHEMICAL ENGINEERING JOURNAL 359(2019):1215-1223.
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