DOI: 10.1016/j.watres.2018.03.006
Scopus记录号: 2-s2.0-85043335456
论文题名: Enhanced Fe(III)-mediated Fenton oxidation of atrazine in the presence of functionalized multi-walled carbon nanotubes
作者: Yang Z. ; Yu A. ; Shan C. ; Gao G. ; Pan B.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 137 起始页码: 37
结束页码: 46
语种: 英语
英文关键词: Atrazine
; Fe(III)-Mediated
; Fenton reaction
; Multi-walled nanotubes
Scopus关键词: Herbicides
; Multiwalled carbon nanotubes (MWCN)
; Oxidation
; Surface chemistry
; X ray photoelectron spectroscopy
; Yarn
; Enhanced effects
; Fenton reactions
; Fenton-like reactions
; Functionalized multi-walled carbon nanotubes
; Hydroxyl radicals
; Model contaminant
; Multi-walled nanotubes
; Rate-limiting steps
; Iron compounds
; atrazine
; carbonyl derivative
; carboxyl group
; ferric ion
; ferrous ion
; ferrozine
; hydroxyl group
; hydroxyl radical
; multi walled nanotube
; atrazine
; carbon nanotube
; hydrogen peroxide
; iron
; atrazine
; carbon nanotube
; chemical reaction
; complexation
; degradation
; hydroxyl radical
; iron
; oxidation
; reduction
; Article
; chemical reaction
; chemical structure
; complex formation
; degradation
; electron spin resonance
; Fenton reaction
; infrared spectroscopy
; priority journal
; stoichiometry
; surface area
; surface property
; transmission electron microscopy
; ultra performance liquid chromatography
; waste component removal
; X ray photoelectron spectroscopy
; chemistry
; oxidation reduction reaction
; pollutant
; X ray photoemission spectroscopy
; Atrazine
; Environmental Pollutants
; Hydrogen Peroxide
; Hydroxyl Radical
; Iron
; Nanotubes, Carbon
; Oxidation-Reduction
; Photoelectron Spectroscopy
英文摘要: In this study we reported that the presence of functionalized multi-walled carbon nanotubes (FCNT-H) would greatly enhance the degradation of atrazine (ATZ), a model contaminant, in the Fe(III)-mediated Fenton-like system. Efficient ATZ degradation (>90%) was achieved within 30 min in the presence of 20 mg.L−1 FCNT-H, 2.0 mg.L−1 Fe(III), and 170 mg.L−1 H2O2, whereas negligible ATZ degradation occurred in FCNT-H free system. The structure and surface chemistry of FCNT-H and other CNTs were well characterized. The formed active species were determined based on ESR analysis, and the mass balance of Fe species during the reaction was monitored. In particular, a new method based on ferrozine complexation was proposed to track the formed Fe(II). The results indicated that ATZ was mainly degraded by the generated hydroxyl radical (HO·), and Fe(III)/Fe(II) cycling was still the rate-limiting step. Besides a small fraction of Fe(III) reduced by FCNT-H, a new pathway was revealed for fast reduction of most Fe(III), i.e., reaction of FCNT-H-Fe(III) complexes with H2O2. Comparison of different CNTs-mediated Fe(III)/H2O2 systems indicated that such enhanced effect of CNTs mainly resulted from the surface carboxyl group instead of hydroxyl and carbonyl group. Combined with X-ray photoelectron spectroscopy (XPS) analysis, the electron density migration from Fe(III) to FCNT-H possibly resulted in the fast reduction of FCNT-H-Fe(III) complexes by H2O2. This study enables better understanding the enhanced Fe(III)-mediated Fenton-like reaction in the presence of MWCNTs and thus, will shed new light on how to develop more efficient similar Fenton systems via Fe(III) complexation. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112804
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China; Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing, 210023, China
Recommended Citation:
Yang Z.,Yu A.,Shan C.,et al. Enhanced Fe(III)-mediated Fenton oxidation of atrazine in the presence of functionalized multi-walled carbon nanotubes[J]. Water Research,2018-01-01,137