KOPRI Repository

Freezing-Induced Simultaneous Reduction of Chromate and Production of Molecular Iodine: Mechanism, Kinetics, and Practical Implications

Cited 0 time in wos
Cited 1 time in scopus
Metadata Downloads

Full metadata record

DC Field Value Language
dc.contributor.authorKim, Kitae-
dc.contributor.authorChung, Hyun Young-
dc.contributor.authorKim, Bomi-
dc.contributor.authorWong, Gracie-
dc.contributor.authorNguyen, Anh Quoc Khuong-
dc.contributor.authorKim, Saewung-
dc.contributor.authorKim, Jungwon-
dc.date.accessioned2021-05-04T06:16:25Z-
dc.date.available2021-05-04T06:16:25Z-
dc.date.issued2020-12-
dc.identifier.urihttps://repository.kopri.re.kr/handle/201206/11818-
dc.description.abstractA new method for the concurrent treatment of Cr(VI)-contaminated wastewater and production of the useful I2 chemical was developed. The method is based on the redox reaction between Cr(VI) and I? that occurs when an aqueous wastewater solution containing Cr(VI) and I? is frozen, producing I2 and allowing for the effective removal of Cr. The redox reaction occurs primarily due to the accumulation of Cr(VI), I?, and protons in the ice grain boundaries formed during freezing (i.e., the freeze concentration effect). This effect was verified by confocal Raman spectroscopy and the experiments varying I? concentration and pH. The reduction of Cr(VI) (20 μM) was near complete after freezing at I? concentrations ≥ 100 μM, pH ≤ 3.0, and temperatures ≤ ?10 °C. The freezing method (liquid cooling vs air cooling) had little effect on the final Cr(VI) reduction efficiency, but had a significant effect on the Cr(VI) reduction rate. The freezing method was also tested with Cr(VI)-contaminated electroplating wastewater samples and simultaneous Cr(VI) reduction and I2 production proceeded rapidly in a frozen solution but was not observed in an aqueous solution. Additionally, other substances in electroplating wastewater did not reduce the rate and final efficiency of Cr(VI) reduction and I2 production. Therefore, the freezing/Cr(VI)/I? system can be considered a feasible approach to water-energy nexus technology for simultaneous I2 production and Cr(VI)-contaminated wastewater treatment.en_US
dc.languageEnglishen_US
dc.language.isoen_USen_US
dc.subjectEngineeringen_US
dc.subjectEnvironmental Sciences & Ecologyen_US
dc.subject.classification기타()en_US
dc.titleFreezing-Induced Simultaneous Reduction of Chromate and Production of Molecular Iodine: Mechanism, Kinetics, and Practical Implicationsen_US
dc.title.alternative동결을 이용한 독성크롬 제거 및 유용 요오드 회수 연구en_US
dc.typeArticleen_US
dc.identifier.bibliographicCitationKim, Kitae, et al. 2020. "Freezing-Induced Simultaneous Reduction of Chromate and Production of Molecular Iodine: Mechanism, Kinetics, and Practical Implications". <em>ENVIRONMENTAL SCIENCE & TECHNOLOGY</em>, 54(24): 16204-16211.en_US
dc.citation.titleENVIRONMENTAL SCIENCE & TECHNOLOGYen_US
dc.citation.volume54en_US
dc.citation.number24en_US
dc.identifier.doi10.1021/acs.est.0c05322-
dc.citation.startPage16204en_US
dc.citation.endPage16211en_US
dc.description.articleClassificationSCI-
dc.description.jcrRateJCR 2018:5.578en_US
dc.subject.keywordChromate removalen_US
dc.subject.keywordElectroplating wastewateren_US
dc.subject.keywordFreezingen_US
dc.subject.keyworddual-function systemen_US
dc.subject.keywordiodine productionen_US
dc.identifier.localId2020-0191-
dc.identifier.scopusid2-s2.0-85095839574-
dc.identifier.wosid000600100400064-
Appears in Collections  
2020-2020, Investigation of ice microstructure properties for developing low-temperature purification and environment/energy materials (20-20) / Kim, Kitae (PE20030)
2020-2020, Development of potential candidates as antibiotics based on polar genetic resources (20-20) / Lee, Jun Hyuck (PM20030)
Files in This Item

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse