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Freezing-induced activation of the binary chloride-Oxone system to free chlorine and its application in water treatment

Cited 2 time in wos
Cited 2 time in scopus

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dc.contributor.authorKim, Kitae-
dc.contributor.authorNhat Thi Hong Le-
dc.contributor.authorAnh Quoc Khuong Nguyen-
dc.contributor.author안용윤-
dc.contributor.authorKim, Bomi-
dc.contributor.author신관용-
dc.contributor.author최원용-
dc.contributor.author김정원-
dc.date.accessioned2022-09-05T16:36:42Z-
dc.date.available2022-09-05T16:36:42Z-
dc.date.issued2022-
dc.identifier.urihttps://repository.kopri.re.kr/handle/201206/13821-
dc.description.abstractAccelerated chemical reactions in frozen solutions can be applied in the degradation of organic pollutants in water. Herein we propose a novel freezing system that enables the degradation of various organic compounds in a frozen solution. Although the degradation of 4-chlorophenol (4-CP) by Oxone as the sole primary oxidant did not take place in aqueous solutions (25 °C) regardless of the presence of chloride ions (Cl?, micromolar levels) and only took place to a minor extent in frozen solutions (?20 °C) in the absence of Cl?, the addition of Cl? (micromolar levels) to the freezing/Oxone system significantly accelerated the degradation of 4-CP. Various analytical characterizations and pH measurements of the frozen solution suggested that the enhanced degradation of 4-CP in the freezing/Oxone/Cl? system could be because Cl?, Oxone, and protons are concentrated in the liquid brine upon freezing. This process subsequently facilitates the formation of hypochlorous acid (HOCl) as a secondary oxidant. The positive effect of Cl? was observed under widely varying conditions (i.e., [Cl?] = 25?1000 μM, pHi = 3?11, and freezing temperature = from ?10 to ?30 °C), and the freezing/Oxone/Cl? system described herein successfully degraded all 12 tested organic pollutants. In addition, outdoor freezing experiments carried out on winter days confirmed the successful performance of the freezing/Oxone/Cl? system without the requirement for electrical energy.-
dc.languageEnglish-
dc.subject.classification기타()-
dc.titleFreezing-induced activation of the binary chloride-Oxone system to free chlorine and its application in water treatment-
dc.title.alternative동결을 이용한 염소활성화를 통한 수처리 공정 개발연구-
dc.typeArticle-
dc.identifier.bibliographicCitationKim, Kitae, et al. 2022. "Freezing-induced activation of the binary chloride-Oxone system to free chlorine and its application in water treatment". <em>CHEMICAL ENGINEERING JOURNAL</em>, 428(1): 1-9.-
dc.citation.titleCHEMICAL ENGINEERING JOURNAL-
dc.citation.volume428-
dc.citation.number1-
dc.identifier.doi10.1016/j.cej.2021.131134-
dc.citation.startPage1-
dc.citation.endPage9-
dc.description.articleClassificationSCIE-
dc.description.jcrRateJCR 2020:2.797-
dc.identifier.localId2022-0121-
Appears in Collections  
2022-2022, Investigation of ice microstructure properties for developing low-temperature purification and environment/energy materials (22-22) / Kim, Kitae (PE22120)
2021-2021, Development of potential candidates as antibiotics based on polar genetic resources (21-21) / Lee, Jun Hyuck (PM21030)
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