Autonomous Stepwise Process for Adsorption, Reduction, and Desorption of Chromium Ions by Using Hydrogel Beads Having Poly(ethylene glycol) Chains
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- Ishigaki Yuzo
- Nagoya Municipal Industrial Research Institute
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- Kinoshita Takehiko
- Nagoya Municipal Industrial Research Institute
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- Nakano Kazunori
- Nagoya Municipal Industrial Research Institute
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- Yamaguchi Koichi
- Nagoya Municipal Industrial Research Institute
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- Shibata Nobuyuki
- Nagoya Municipal Industrial Research Institute
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- Aoi Keigo
- Graduate School of Bioagricultural Sciences, Nagoya University
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- Nii Susumu
- Department of Chemical Engineering, Nagoya University
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- Akita Shigendo
- Nagoya Municipal Industrial Research Institute
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Hydrogel beads were prepared by the free-radical polymerization of acrylates having poly(ethylene glycol) (PEG) as the side chain. These beads were used in a batch mode for the detoxication of hexavalent chromium (Cr(VI)) in aqueous solutions. The beads adsorbed Cr(VI) and reduced the Cr(VI) to Cr(III) without requiring any reducing agents to be added. The reduction was followed by the spontaneous release of the resulting Cr(III) in the solution. Such behaviour is attributable to a difference in non-covalent interactions between the PEG chains and the two chromium species. The reduction time for Cr(VI) strongly depended on the solution acidity; it varied from 24 h for a 2 N HCl aqueous solution to 10 weeks for a solution with a pH of 6. The gel beads could withstand a minimum of 20 cyclic uses.
収録刊行物
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- JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
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JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 45 (2), 148-153, 2012
公益社団法人 化学工学会
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詳細情報 詳細情報について
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- CRID
- 1390001204570200320
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- NII論文ID
- 130001091493
- 10030159248
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- NII書誌ID
- AA00709658
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- ISSN
- 18811299
- 00219592
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- NDL書誌ID
- 023514241
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- 使用不可