Influence of Magnetic Field on the Kinetics of Ho(III) Solvent Extraction Using D2EHPA: A Comprehensive Study

The kinetics of Ho(III) extraction using di(2‐ethylhexyl)phosphoric acid (D2EHPA) under the influence magnetic field are examined. The methodology for kinetics research is based on spectrophotometric techniques. Initial experiments without a magnetic field assess the influence of Ho(III) concentration (0.00625–0.1 m), pH (1–6), D2EHPA concentration (0.1–2 m), and temperatures (5–35 °C). Subsequent tests (5–35 °C) determine the influence of the magnetic field. Experimental considerations are supplemented with numerical simulations of the magnetic field affecting the extraction system. A white precipitate formed at the phase boundary is characterized using X‐ray fluorescence (XRF), X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FT‐IR), and X‐ray photoelectron spectroscopy (XPS) techniques. Post‐extraction solutions are analyzed with nuclear magnetic resonance (NMR) spectroscopy to investigate the structure and magnetic properties of the D2EHPA‐Ho(III) complex. The conducted research indicate that magnetic fields notably enhance kinetics of extraction above 25 °C, suggesting a possible change in the extraction mechanism.