globalchange  > 气候减缓与适应
DOI: 10.1016/j.watres.2018.03.069
Scopus记录号: 2-s2.0-85047376703
论文题名:
Contribution of alcohol radicals to contaminant degradation in quenching studies of persulfate activation process
作者: Zhu C.; Zhu F.; Dionysiou D.D.; Zhou D.; Fang G.; Gao J.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 139
起始页码: 66
结束页码: 73
语种: 英语
英文关键词: Alcohol radical ; Persulfate ; Quenching reaction ; Reductively degradation
Scopus关键词: Chlorine compounds ; Dechlorination ; Degradation ; Dissolved oxygen ; Impurities ; Paramagnetic resonance ; Phenols ; Quenching ; Reaction rates ; Trichloroacetic acid ; Activated process ; Anaerobic conditions ; Concentration of dissolved oxygen ; Contaminant degradation ; Persulfate ; Persulfate activations ; Reaction solutions ; Thermally activated ; Biodegradation ; alcohol ; anion ; carbon tetrachloride ; dissolved oxygen ; free radical ; persulfate ; phenol ; tert butyl alcohol ; trichloroacetic acid ; unclassified drug ; alcohol ; sodium derivative ; sodium persulfate ; sulfate ; tert butyl alcohol ; alcohol ; anoxic conditions ; degradation ; oxidation ; radical ; reaction kinetics ; reactive oxygen species ; sulfate ; analytic method ; Article ; contamination ; dechlorination ; degradation ; electron spin resonance ; electron transport ; high performance liquid chromatography ; pollutant ; priority journal ; chemistry ; halogenation ; oxidation reduction reaction ; water pollutant ; Carbon Tetrachloride ; Ethanol ; Free Radicals ; Halogenation ; Oxidation-Reduction ; Phenol ; Sodium Compounds ; Sulfates ; tert-Butyl Alcohol ; Trichloroacetic Acid ; Water Pollutants, Chemical
英文摘要: Alcohols such as ethanol (EtOH) and tert-butanol (TBA) are frequently used as quenching agents to identify the primary radical species in the persulfate (PS)-based oxidation processes. However, the contribution of alcohol radicals (ARs) to contaminant degradation in this process has rarely been assessed. In this study, trichloroacetic acid (TCA), phenol, and carbon tetrachloride were selected as probes to test the role of ARs in the thermally activated PS system. It was found that the degradation rates of these compounds were largely depended on their reactivities with ARs and the concentration of dissolved oxygen in the reaction system. In the PS/alcohol system, TCA was degraded efficiently under anaerobic conditions, while it was hardly degraded in the presence of oxygen. The results of electron paramagnetic resonance, reducing radical quenching studies, and the analysis of PS consumption suggested that ARs were the dominant reactive species contributing to TCA degradation in the PS/EtOH system under anaerobic conditions. Further studies indicated that ARs could significantly degrade CCl4 through dechlorination but not phenol. CCl4 was also degraded efficiently by ARs when oxygen in the reaction solution was completely consumed by ARs. This study highlights the important role of alcohol radicals in the degradation of contaminants during quenching studies in PS-activated processes. © 2018 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112751
Appears in Collections:气候减缓与适应

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作者单位: Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering (ChEE), University of Cincinnati, Cincinnati, OH 45221-0071, United States

Recommended Citation:
Zhu C.,Zhu F.,Dionysiou D.D.,et al. Contribution of alcohol radicals to contaminant degradation in quenching studies of persulfate activation process[J]. Water Research,2018-01-01,139
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