DOI: 10.1016/j.watres.2019.01.024
Scopus记录号: 2-s2.0-85060984988
论文题名: Catalytic oxidation of diclofenac by hydroxylamine-enhanced Cu nanoparticles and the efficient neutral heterogeneous-homogeneous reactive copper cycle
作者: Xiang W. ; Zhou T. ; Wang Y. ; Huang M. ; Wu X. ; Mao J. ; Lu X. ; Zhang B.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 274
结束页码: 283
语种: 英语
英文关键词: Cu nanoparticles
; Fenton-like
; Hydroxylamine
; Molecule oxygen activation
; Neutral copper cycle
Scopus关键词: Amines
; Catalytic oxidation
; Chemical activation
; Degradation
; Molecular oxygen
; Nanometals
; Nanoparticles
; Wastewater treatment
; Cu nano-particles
; Fenton likes
; Hydroxylamine
; Neutral copper cycle
; Oxygen activations
; Copper compounds
; copper
; copper nanoparticle
; diclofenac
; hydroxylamine
; amino acid
; catalysis
; chemical alteration
; copper
; degradation
; drug
; molecular analysis
; nanoparticle
; oxygen
; pristine environment
; reaction kinetics
; water treatment
; Article
; degradation
; liquid
; oxidation
; pH
; priority journal
; quantitative analysis
; reaction analysis
; reaction temperature
; solid
; waste water management
英文摘要: This study has demonstrated that hydroxylamine (HA) could greatly enhance Cu nanoparticles (nCu) in activating molecular oxygen and significantly elevate the diclofenac (DCF) degradation rate about two orders of magnitude in neutral circumstances. Effects of several important parameters on the DCF degradation such as nCu loading, HA dosage, pH and reaction temperature were investigated in the nCu/HA/O 2 system. Multiple examinations revealed that the reactive Cu(III) species instead of OH• would be predominant in the nCu/HA/O 2 system, despite their similar DCF degradation pathways. Based on a HA-enhanced copper cycle depending on the pristine Cu 0 @Cu(I) (hydro)oxides core-shell structure, the heterogeneous-homogeneous reaction mechanism was proposed. It included solid-liquid interfacial and bulk reactions, e.g. heterogeneous activation of O 2 by Cu(I) to produce H 2 O 2 and homogeneous Cu(I)-catalytic generation of Cu(III) from H 2 O 2 . Further quantitative investigation of the main reactive species in the cycle revealed that the Cu(I) regeneration instead of the O 2 activation would be rate-limited. Besides, nCu could be recycled to effectively degrade DCF in four consecutive cycles in the raw neural nCu/HA/O 2 system. It suggested that the nCu/HA/O 2 system with a more efficient copper cycle would be a good alternative Fenton-like system in treating neutral recalcitrant organic wastewaters. © 2019 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/121976
Appears in Collections: 气候变化事实与影响
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作者单位: School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China; Key Laboratory of Water and Wastewater Treatment (HUST), MOHURD, Wuhan, 430074, China
Recommended Citation:
Xiang W.,Zhou T.,Wang Y.,et al. Catalytic oxidation of diclofenac by hydroxylamine-enhanced Cu nanoparticles and the efficient neutral heterogeneous-homogeneous reactive copper cycle[J]. Water Research,2019-01-01