离子液体中铂萃取机理的多核磁共振评价

IF 5.3 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Liquids Pub Date : 2025-04-22 DOI:10.1016/j.molliq.2025.127643

Nithya Hellar , Arunkumar Dorai , Junichi Kawamura

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引用次数: 0

摘要

铂族金属（铂族金属）资源有限，具有很高的经济价值，是现代设备和电器的关键部件，其可回收性至关重要。离子液体通过不同的相互作用机制，安全有效地回收和再利用电子垃圾中的PGMs。本研究利用多核核磁共振（NMR）技术研究了六氟磷酸二丁甲基咪唑（BMIM-PF6）从水介质中萃取铂（Pt）的机理。萃取后离子液相的195Pt核磁共振谱随铂浓度的增加而增强，证实了萃取成功。此外，萃取后水相的19F NMR谱信号强度增加，表明Pt的萃取是通过阴离子交换机制进行的。我们的研究结果表明，核磁共振波谱是阐明金属离子提取机制的有力工具。

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Evaluation of platinum extraction mechanism in ionic liquids using multinuclear NMR spectroscopy

Platinum group metals (PGMs), whose resources are limited, possess high economic value and are critical components in modern devices and appliances, making their recyclability essential. Ionic liquids (ILs) are safe and effective to recover and recycle PGMs from e-waste through different interaction mechanisms. This study evaluates the extraction mechanism of platinum (Pt) from aqueous media using the IL Butyl methyl imidazolium hexafluorophosphate (BMIM-PF₆) through multinuclear nuclear magnetic resonance (NMR) spectroscopy. The ¹⁹⁵Pt NMR spectra for the ionic liquid phase after Pt extraction show increased intensity with increasing platinum concentration, confirming the successful extraction of Pt into the ionic liquid. Additionally, increased signal intensity in the ¹⁹F NMR spectra of the aqueous phase after extraction indicates that Pt extraction occurs via an anion exchange mechanism. Our results demonstrate that NMR spectroscopy is a powerful tool for elucidating metal ion extraction mechanisms.

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来源期刊

Journal of Molecular Liquids 化学-物理：原子、分子和化学物理

CiteScore

10.30

自引率

16.70%

发文量

2597

审稿时长

78 days

期刊介绍： The journal includes papers in the following areas: – Simple organic liquids and mixtures – Ionic liquids – Surfactant solutions (including micelles and vesicles) and liquid interfaces – Colloidal solutions and nanoparticles – Thermotropic and lyotropic liquid crystals – Ferrofluids – Water, aqueous solutions and other hydrogen-bonded liquids – Lubricants, polymer solutions and melts – Molten metals and salts – Phase transitions and critical phenomena in liquids and confined fluids – Self assembly in complex liquids.– Biomolecules in solution The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include: – Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.) – Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.) – Light scattering (Rayleigh, Brillouin, PCS, etc.) – Dielectric relaxation – X-ray and neutron scattering and diffraction. Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.