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Chromium(VI) adsorption–reduction using a fibrous amidoxime-grafted adsorbent
https://repo.qst.go.jp/records/84036
https://repo.qst.go.jp/records/840360f5f1911-0dde-40c7-827e-41eb1737cafe
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2021-08-17 | |||||
| タイトル | ||||||
| タイトル | Chromium(VI) adsorption–reduction using a fibrous amidoxime-grafted adsorbent | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 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 | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Hayashi, Natsuki
× Hayashi, Natsuki× Matsumura, Daiju× Hoshina, Hiroyuki× Ueki, Yuji× Tsuji, Takuya× Jinhua, Chen× Noriaki, Seko× Hiroyuki, Hoshina× Yuuji, Ueki× Jinhua, Chen× Noriaki, Seko |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | To comply with regulations and mitigate environmental pollution, efficient technologies are required for treating chromium-contaminated industrial wastewater. To develop a safe and simple method for the reduction of toxic chromium(VI) to the less harmful chromium(III), we proposed using radiation-induced graft polymerization. This method allows for any functional group to be introduced into conventional polymeric materials, which enables the synthesis of solid adsorbents with good handling properties. Herein, we synthesized a fibrous adsorbent with amidoxime functional groups that have a high affinity for chromium, and investigated the changes in the chromium valence state over time in the amidoxime-grafted adsorbent. Fourier transform infrared analysis suggested that the amide groups were oxidized by chromium(VI) and converted to nitro groups. Furthermore, in situ X-ray absorption fine structure analysis revealed that most of the chromium(VI) was reduced to chromium(III) relatively early during the adsorption process, followed by gradual changes in the bonding structure of the amidoxime-chromium complex. Although more than one day was required to completely stabilize the structure of chromium(III), this approach provides a safe method for chromium(VI) removal. Furthermore, because wastewater can be treated via simple circulation with this method, it is easier to operate than coagulation sedimentation or electrochemical methods. Thus, it is expected to contribute to the development of practical technologies for wastewater treatment. | |||||
| 書誌情報 |
Separation and Purification Technology 巻 277, p. 119536, 発行日 2021-08 |
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| 出版者 | ||||||
| 出版者 | Elsevier | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 1383-5866 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1016/j.seppur.2021.119536 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://www.sciencedirect.com/science/article/abs/pii/S1383586621012442?via%3Dihub | |||||
