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  1. Published Papers
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Chromatographic Purification of Lithium, Vanadium, and Uranium from Seawater Using Organic Composite Adsorbents Composed of Benzo-18-Crown-6 and Benzo-15-Crown-5 Embedded in Highly Porous Silica Beads

http://hdl.handle.net/10655/00013470
http://hdl.handle.net/10655/00013470
03ca74cd-b421-4ab7-907a-3bc49e915946
名前 / ファイル ライセンス アクション
13470_acsomega.pdf 13470_acsomega (5.5 MB)
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Item type 学術雑誌論文 / Journal Article(1)
公開日 2022-09-06
タイトル
タイトル Chromatographic Purification of Lithium, Vanadium, and Uranium from Seawater Using Organic Composite Adsorbents Composed of Benzo-18-Crown-6 and Benzo-15-Crown-5 Embedded in Highly Porous Silica Beads
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
著者 TACHIBANA, Yu

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TACHIBANA, Yu

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KALAK, Tomasz

× KALAK, Tomasz

KALAK, Tomasz

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TANAKA, Masahiro

× TANAKA, Masahiro

TANAKA, Masahiro

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著者ID
内容記述タイプ Other
内容記述 0000-0003-4530-1459
抄録
内容記述タイプ Abstract
内容記述 The use of the composite adsorbents composed of benzo-15-crown-5 (abbreviated as BC15) and benzo-18-crown-6 (BC18) for the simultaneous recovery of vanadium (V), uranium (U), and lithium (Li) from seawater has been proposed for industrial applications. The adsorption and desorption behavior of these elements on BC15 and BC18 has been examined in various types of aqueous solutions over a wide temperature range. As a result, it was shown that BC15 and BC18 have sufficient adsorption ability for the simultaneous recovery of V, U, and Li from seawater. Moreover, it was seen that the distribution coefficients (Kd) of V decrease with an increase in [HCl]T (subscript T: total concentration), indicating that the anionic V species such as H2V4O134– are exponentially changed into the cationic V species such as V3+, VO2+, and VO2+ under the condition [HCl]T = 1.0 M, and the complexation reactions between BC15 (or BC18) and the initial V structures are inhibited. Besides, it was reasonably shown that the adsorption mechanism is the path through the electrostatic interaction between the anionic V species such as H2V4O134–, and the −C–O–C– single bond that the electron density is eccentrically located in ether functional groups in crown ether rings in BC15 and BC18 (or the −C–OH single bond that the electron density is eccentrically located in bisphenol A in BC15 and BC18). Then, the chromatography experiment of V, U, and Li on BC15 (or BC18) at 298 K was carried out by flowing seawater, 1.0 × 10–2 M HCl, and 1.0 M HCl in sequence. The first peak of V can be separated from the plateau of Li and the first and second peaks of U in the case of the BC15 system. The recovery ratios of V and U were more than 80%. On the other hand, entirely overlapping chromatograms were obtained in the case of the BC18 system, and accordingly, the recovery ratios of V and U were much lower. In short, the separation efficiency of V with BC15 is more pre-eminent than that with BC18. Judging from these results, the durability of BC15 was finally assessed for industrial applications, that is, the aforementioned chromatography experiment was repeatedly carried out to check whether V, U, and Li were stably and mutually separated from seawater or not. The evidence that the recovery performances of V, U, and Li from seawater do not decrease at all after at least five cycle tests was provided. This indicates that this information will be valuable for the development of a practical chromatographic technology to simultaneously recover V, U, and Li from seawater.
書誌情報 ACS Omega

巻 7, 号 31, p. 27410-27421, 発行日 2022-07-27
出版者
出版者 American Chemical Society
ISSN
収録物識別子タイプ ISSN
収録物識別子 2470-1343
DOI
関連タイプ isIdenticalTo
識別子タイプ DOI
関連識別子 10.1021/acsomega.2c02427
権利
権利情報 © 2022 The Authors.
関連サイト
識別子タイプ DOI
関連識別子 https://doi.org/10.1021/acsomega.2c02427
関連名称 Publisher version
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
NAIS
13470
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