DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, Kitae | - |
dc.contributor.author | Le, Nhat Thi Hong | - |
dc.contributor.author | Nguyen, Anh Quoc Khuong | - |
dc.contributor.author | Ahn, Yong-Yoon | - |
dc.contributor.author | Kim, Bomi | - |
dc.contributor.author | Shin, Gwanyong | - |
dc.contributor.author | Choi, Wonyong | - |
dc.contributor.author | Kim, Jungwon | - |
dc.date.accessioned | 2023-04-12T06:20:41Z | - |
dc.date.available | 2023-04-12T06:20:41Z | - |
dc.date.created | 2022-01-06 | - |
dc.date.issued | 2022-01 | - |
dc.identifier.issn | 1385-8947 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/117509 | - |
dc.description.abstract | Accelerated 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 degrees C) regardless of the presence of chloride ions (Cl-, micromolar levels) and only took place to a minor extent in frozen solutions (-20 degrees 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 mu M, pH(i) = 3-11, and freezing temperature = from -10 to -30 degrees 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.language | English | - |
dc.publisher | Elsevier BV | - |
dc.relation.isPartOf | Chemical Engineering Journal | - |
dc.title | Freezing-induced activation of the binary chloride-Oxone system to free chlorine and its application in water treatment | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.cej.2021.131134 | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | Chemical Engineering Journal, v.428 | - |
dc.identifier.wosid | 000729145600003 | - |
dc.citation.title | Chemical Engineering Journal | - |
dc.citation.volume | 428 | - |
dc.contributor.affiliatedAuthor | Choi, Wonyong | - |
dc.identifier.scopusid | 2-s2.0-85110222926 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.type.docType | Article | - |
dc.subject.keywordPlus | AQUEOUS-SOLUTIONS | - |
dc.subject.keywordPlus | PEROXYMONOSULFATE ACTIVATION | - |
dc.subject.keywordPlus | METAL NANOPARTICLES | - |
dc.subject.keywordPlus | OXIDATION | - |
dc.subject.keywordPlus | DEGRADATION | - |
dc.subject.keywordPlus | PERSULFATES | - |
dc.subject.keywordPlus | KINETICS | - |
dc.subject.keywordPlus | FROZEN | - |
dc.subject.keywordPlus | INACTIVATION | - |
dc.subject.keywordPlus | MECHANISM | - |
dc.subject.keywordAuthor | Advanced oxidation process | - |
dc.subject.keywordAuthor | Chemical reaction in frozen solution | - |
dc.subject.keywordAuthor | Freezing-induced water treatment | - |
dc.subject.keywordAuthor | Freeze concentration effect | - |
dc.subject.keywordAuthor | Free chlorine production | - |
dc.relation.journalWebOfScienceCategory | Engineering, Environmental | - |
dc.relation.journalWebOfScienceCategory | Engineering, Chemical | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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