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Accelerated chromate reduction by tea waste: Comparison of chromate reduction properties between water and ice systems

Cited 2 time in wos
Cited 2 time in scopus

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dc.contributor.authorHan, Tae Uk-
dc.contributor.authorKim, Jungwon-
dc.contributor.authorKim, Kitae-
dc.date.accessioned2022-07-08T00:54:33Z-
dc.date.available2022-07-08T00:54:33Z-
dc.date.issued2021-06-
dc.identifier.urihttps://repository.kopri.re.kr/handle/201206/13633-
dc.description.abstractThe concentration of chromium (Cr) in natural water and soil environments has gradually increased in recent decades, owing to intensive use of Cr in industry and its subsequent disposal. In this study, we performed a comparison study on chromate (Cr6+) reduction by tea waste (green tea, black tea, red tea, and chamomile) in water (25 °C) and ice (-20 °C) to develop a new strategy for environmental-friendly stabilization of hazardous Cr6+ by freezing. This study shows that the freezing process can enhance the reduction of Cr6+ by tea waste. The residual Cr6+ concentration ratios (C/C0) by tea wastes in water were in the range of 0.71 (green tea) to 0.92 (chamomile); however, the ratios dramatically decreased under the freezing process (i.e., 0.06 by green tea, 0.13 by black tea, 0.18 by red tea, and 0.08 by green tea). According to the results obtained from the fluorescent, chromatographic, and spectroscopic analyses, under the freezing process, the enhanced reduction of Cr6+ could be explained by the freeze concentration of Cr6+, phenolic components in tea extracts, and protons in small liquid pockets in liquid-like layers (LLLs). In addition, the proposed system can efficiently purify the real Cr6+-containing wastewater (i.e., electroplating wastewater), indicating that the system will be economically feasible in cold regions (i.e., polar regions).en_US
dc.languageEnglishen_US
dc.language.isoenen_US
dc.subjectEnvironmental Sciences & Ecologyen_US
dc.subjectPublic, Environmental & Occupational Healthen_US
dc.subject.classification기타()en_US
dc.titleAccelerated chromate reduction by tea waste: Comparison of chromate reduction properties between water and ice systemsen_US
dc.title.alternative차 폐기물에 의한 크롬 독성 감소 가속화 연구: 물과 얼음에서 독성크롬 감소 특성 비교en_US
dc.typeArticleen_US
dc.identifier.bibliographicCitationHan, Tae Uk, Kim, Jungwon, Kim, Kitae. 2021. "Accelerated chromate reduction by tea waste: Comparison of chromate reduction properties between water and ice systems". <em>ENVIRONMENTAL RESEARCH</em>, 197: 1-11.-
dc.citation.titleENVIRONMENTAL RESEARCHen_US
dc.citation.volume197en_US
dc.identifier.doi10.1016/j.envres.2021.111059-
dc.citation.startPage1en_US
dc.citation.endPage11en_US
dc.description.articleClassificationSCIE-
dc.description.jcrRateJCR 2019:7.772en_US
dc.subject.keywordWaste utilizationen_US
dc.subject.keywordChromateen_US
dc.subject.keywordIceen_US
dc.subject.keywordLiquid-like layeren_US
dc.subject.keywordFreezingen_US
dc.identifier.localId2021-0216-
dc.identifier.scopusid2-s2.0-85103705196-
dc.identifier.wosid000657473900001-
Appears in Collections  
2021-2021, Investigation of ice microstructure properties for developing low-temperature purification and environment/energy materials (21-21) / Kim, Kitae (PE21120)
2020-2020, Development of potential candidates as antibiotics based on polar genetic resources (20-20) / Lee, Jun Hyuck (PM20030)
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