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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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| アイテムタイプ | 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 | |||||||||||||||
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| 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 | |||||||||||||||
