The application of structural analysis in the investigation of solvent extraction mechanism

Abstract

In the present work, we review the methods employed in the investigation of solvent extraction mechanism. The employment of slope-analysis traditional methods in extraction were accomplished based on chemical equilibrium, the stoichiometry of extracted complexes and gained no definitive structural information of the extracted complexes. The application of molecular vibration spectrum, electrospray ionization mass spectrometry, nuclear magnetic resonance, X-ray single crystal diffraction, synchrotron radiation X-ray absorption spectrometry, etc. modern analytical techniques in the investigation of solvent extraction also provide the coordination structure of the extracted species formed during the extraction process. However, not every analytical technique is available, such as synchrotron radiation X-ray absorption spectrometry, the most effective method to study the structure of short-range ordered systems such as amorphous samples and solutions, while others employed in the investigation of the solid structure which is not suitable for solvent extraction. The combination of X-ray single crystal diffraction and modern spectral techniques provide new directions in the investigation of solvent extraction mechanism.

Graphical Abstract

Keywords:

• Extraction mechanism
• spectrum techniques
• structure of extracted complex
• stoichiometry of extracted complex

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was financially supported by Basic Research Project of Guizhou Provincial Department of Science and Technology (Guizhou Science and Technology Foundation [2019]1292), Liupanshui Metallurgical Solid Waste Recycling and Environmental Protection Technology Innovation Team (52020-2019-05-08), High-level talent research start-up fund of Liupanshui Normal University (LPSSYKYJJ201809), Key field project of Natural Science Research of Guizhou Provincial Department of Education (Guizhou Education KY[2020]049), Guizhou Liupanshui Normal University academician workstation (Guizhou Science and Technology Platform Talent [2019]5604) and Guizhou Key Laboratory of clean coal utilization (Guizhou Science and Technology Platform Talent [2020]2001).