globalchange  > 气候变化事实与影响
DOI: 10.1016/j.watres.2018.10.090
Scopus ID: 2-s2.0-85056170863
Factors and mechanisms that influence the reactivity of trivalent copper: A novel oxidant for selective degradation of antibiotics
Author: Feng Y.; Qing W.; Kong L.; Li H.; Wu D.; Fan Y.; Lee P.-H.; Shih K.
Source Publication: Water Research
ISSN: 431354
Publishing Year: 2019
pages begin: 1
pages end: 8
Language: 英语
Keyword: Antibiotics ; Copper(III) periodate ; Cu3+ ; Cupryl species ; Selective oxidation ; Trivalent copper
Scopus Keyword: Antibiotics ; Biodegradation ; Chlorine compounds ; Degradation ; Metal ions ; Oxidants ; Phenols ; Reaction intermediates ; Redox reactions ; Water treatment ; Active intermediates ; Cupryl species ; Hydroxyl radicals ; One-electron oxidants ; Phenol degradation ; Selective degradation ; Selective oxidation ; Selective removal ; Copper compounds ; 2 propanol ; antibiotic agent ; chloride ion ; copper complex ; copper ion ; drinking water ; methanol ; oxidizing agent ; periodate ; sulfadiazine ; sulfadimidine ; sulfamethoxazole ; tert butyl alcohol ; trivalent copper ; unclassified drug ; antibiotics ; chloride ; complexity ; copper ; hydroxyl radical ; methanol ; oxidant ; oxidation ; phenolic compound ; reactivation ; redox conditions ; Article ; biodegradation ; chemical analysis ; ionic strength ; oxidation reduction reaction ; pH ; priority journal ; synthesis ; temperature ; ultra performance liquid chromatography ; water treatment
English Abstract: Trivalent copper complexes are active intermediates in aquatic redox reactions that involve copper ions or structural copper, but their reactivity and selectivity toward pollutants remain unknown. We characterized copper(III) periodate, a representative trivalent copper compound, with phenol and several antibiotics as model contaminants. The results show that Cu(III) is highly reactive to phenol degradation; near-complete degradation was achieved after 10 min at a molar ratio of 3:1 (Cu[III]: phenol). Common alcohols, including methanol and 2-propanol, showed pH-dependent reactivity for Cu(III). In contrast to aquo trivalent copper ions that react rapidly with tert-butanol, Cu(III) showed limited reactivity toward tert-butanol. A mechanistic investigation showed that the degradation was caused by direct oxidation by Cu(III) and that no hydroxyl radicals were involved. Common water components such as chloride ions did not influence the reaction, which suggests that the use of Cu(III) may help mitigate the generation of chlorinated products. As a one-electron oxidant, Cu(III) showed high reactivity to degrade electron-rich compounds; the concentrations of sulfamethazine, sulfamethoxazole, and sulfadiazine (100 μg/L) were reduced to 1.8, 7.5, and 42.5 ng/L, respectively, after 2 min of reaction with 10 μM Cu(III). These results demonstrate a novel and highly efficient oxidant for selective removal of ubiquitous micropollutants from water bodies. © 2018 Elsevier Ltd
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被引频次[WOS]:6   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Appears in Collections:气候变化事实与影响

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Affiliation: Department of Civil Engineering, The University of Hong Kong, Pokfulam, Hong Kong SAR, Hong Kong; Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China; School of Energy Science and Engineering, Central South University, Changsha, 410083, China; State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science & Engineering, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China; Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong SAR, Hong Kong

Recommended Citation:
Feng Y.,Qing W.,Kong L.,et al. Factors and mechanisms that influence the reactivity of trivalent copper: A novel oxidant for selective degradation of antibiotics[J]. Water Research,2019-01-01
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