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Recovery of Gold by Solvent Extraction and Direct Electrodeposition Using Phosphonium-Based Ionic Liquids
http://hdl.handle.net/10131/00014812
http://hdl.handle.net/10131/00014812636fc9d3-cb7a-4d8c-9bcc-53c6316bcf97
名前 / ファイル | ライセンス | アクション |
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manuscript_r(JES).pdf (1.1 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2022-11-01 | |||||
タイトル | ||||||
タイトル | Recovery of Gold by Solvent Extraction and Direct Electrodeposition Using Phosphonium-Based Ionic Liquids | |||||
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 |
Masahiko, Matsumiya
× Masahiko, Matsumiya× Ryoma, Kinoshita× Yuji, Sasaki |
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著者所属 | ||||||
Graduate School of Environment and Information Sciences, Yokohama National University | ||||||
著者所属 | ||||||
Graduate School of Environment and Information Sciences, Yokohama National University | ||||||
著者所属 | ||||||
Nuclear Science and Engineering Directorate, Japan Atomic Energy Agency | ||||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | In this study, phosphonium-based ionic liquids (IL), i.e., triethyl-n-pentyl, triethyl-n-octyl, and triethyl-n-dodecyl phosphonium bis(trifluoromethyl-sulfonyl)amide, [P222X][NTf2], (X = 5, 8, and 12) were investigated for Au(III) extraction. The IL–Au complex was identified as [P2225][AuCl4] using UV–Vis–NIR and Raman spectroscopic analyses. Slope analyses with the concentration dependence of [P222X+] confirmed the anion-exchange mechanism of Au(III) extraction by [P222X+] (X = 5, 8, and 12). The enthalpy, entropy, and Gibbs free energy for Au(III) extraction were determined using thermodynamic analysis, indicating that lower temperatures had a positive effect on the Au(III) extraction. Electrochemical analysis revealed that extracted Au(III) can be reduced in two steps: (i) Au(III) + 2e− → Au(I), (ii) Au(I) + e− → Au(0)]. The diffusion coefficients of the extracted Au(III) species in [P222X][NTf2] (X = 5, 8, and 12) were evaluated from 323 to 373 K using semi-integral and semi-differential analyses. Because of the viscosity of the IL medium, the diffusion coefficient of the extracted Au(III) increases with increasing alkyl chain length. The 4f7/2 spectrum based on X-ray photoelectron spectroscopy revealed that the Au electrodeposits obtained after 10 cycles of continuous extraction and electrodeposition were in the metallic state. | |||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Accepted Manuscript | |||||
書誌情報 |
Journal of The Electrochemical Society 巻 169, 号 8, 発行日 2022-08-18 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 19457111 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00697016 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1149/1945-7111/ac876d | |||||
著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
出版者 | ||||||
出版者 | Electrochemical Society | |||||
出版者 | ||||||
出版者 | IOP Publishing | |||||
関係URI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1149/1945-7111/ac876d | |||||
関連名称 | https://doi.org/10.1149/1945-7111/ac876d |