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Assessment of 265-nm UV-LED for direct photolysis and advanced oxidation of N-nitrosamines and 1,4-dioxane
http://hdl.handle.net/10069/40326
http://hdl.handle.net/10069/403260053b0d6-578c-4faa-a22a-cad006758d63
名前 / ファイル | ライセンス | アクション |
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ETI20_101147.pdf (319.1 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2020-12-16 | |||||
タイトル | ||||||
タイトル | Assessment of 265-nm UV-LED for direct photolysis and advanced oxidation of N-nitrosamines and 1,4-dioxane | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 1,4-dioxane | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Advanced oxidation process | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | CECs | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | NDMA | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Potable reuse | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | UV-LED | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
Fujioka, Takahiro
× Fujioka, Takahiro× Kodamatani, Hitoshi× Yoshikawa, Takumi× Inoue, Daisuke× Ikehata, Keisuke |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The advanced oxidation process (AOP), using conventional low-pressure mercury (LP Hg)-vapor UV lamps, forms a critical barrier for pathogens and contaminants of emerging concern (CECs) in potable water reuse. In recent years, UV-light-emitting diode (UV-LED) has attracted considerable attention as an alternative UV source because it has a long lifetime and is mercury-free. This study assesses the effectiveness of 265-nm UV-LED in removal of characteristic CECs, 1,4-dioxane (100 μg/L) and N-nitrosamines (500 ng/L), including N-nitrosodimethylamine (NDMA), in recycled potable water. Direct photolysis using a UV-LED lamp, at the maximum UV dose of 900 mJ/cm2, achieved a maximum of 31% NDMA reduction, as opposed to a 93% reduction by a conventional LP Hg UV lamp. We attributed this to the longer emission wavelength of the UV-LED (265 nm) than that for the LP Hg UV lamp (254 nm). Both UV lamps failed to photolyze 1,4-dioxane. Using hydrogen peroxide or monochloramine remarkably enhanced the effectiveness of the LP Hg UV-based AOP in removing 1,4-dioxane, and the percentage of NDMA removed also increased slightly; however, it did not improve the effectiveness of the UV-LED-based AOP. We conclude from this study that despite the advantages of the UV-LED over the conventional LP Hg UV lamp, the former performs ineffectively at attenuating major CECs in recycled water. |
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書誌情報 |
Environmental Technology & Innovation 巻 20, p. 101147, 発行日 2020-09-09 |
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出版者 | ||||||
出版者 | Elsevier B.V. | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 23521864 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1016/j.eti.2020.101147 | |||||
権利 | ||||||
権利情報 | c 2020 Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
引用 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Environmental Technology and Innovation, 20, art.no.101147; 2020 |