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Lee, Changha
Advanced Redox Technology (ART) Lab
Research Interests
  • Water Treatment, Advanced Oxidation/Reduction, Water Chemistry, Environmental Catalyst

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Activation of persulfates by carbon nanotubes: Oxidation of organic compounds by nonradical mechanism

Cited 7 times inthomson ciCited 4 times inthomson ci
Title
Activation of persulfates by carbon nanotubes: Oxidation of organic compounds by nonradical mechanism
Author
Lee, HongshinLee, Hye-JinJeong, JoonseonLee, JaesangPark, Noh-BackLee, Changha
Issue Date
2015-04
Publisher
ELSEVIER SCIENCE SA
Citation
CHEMICAL ENGINEERING JOURNAL, v.266, pp.28 - 33
Abstract
Carbon nanotubes (CNTs) have been found to activate persulfates (i.e., peroxymonosulfate and peroxydisulfate) into reactive species that are capable of oxidizing organic compounds in water. In the presence of single- or multi-walled CNTs, persulfates effectively degraded phenolic compounds and certain pharmaceuticals. Phenyl derivatives substituted with electron-withdrawing groups, such as benzoic acid and nitrobenzene, were resistant to degradation by the CNT/persulfate system. Based on observations regarding persulfate decomposition and linear sweep voltammetry using a CNT electrode, it has been suggested that persulfates bind onto the surface of CNTs, forming reactive complexes that are immediately decomposed upon reaction with organic compounds. Electron paramagnetic resonance spectroscopy with spin-trapping indicates that these reactive species are distinct from sulfate radical anions or hydroxyl radicals. The CNT-activated persulfate system shows promise as a novel treatment technology for the selective oxidation of organic contaminants in water.
URI
https://scholarworks.unist.ac.kr/handle/201301/10262
URL
http://www.sciencedirect.com/science/article/pii/S1385894714016799
DOI
10.1016/j.cej.2014.12.065
ISSN
1385-8947
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