Volumetric Properties for the Aqueous Solution of Yttrium Trichloride at Temperatures from 283.15 to 363.15 K and Ambient Pressure

Zhenzhen Jiang,Lingzong Meng,Yafei Guo,Mingli Li,Gaoling Liu,Tianlong Deng,Kangrui Sun,Chi Ma

doi:10.1155/2021/4541213

Zhenzhen Jiang, Lingzong Meng + Show 6 more

Open Access

https://doi.org/10.1155/2021/4541213

Copy DOI

Abstract

To effectively develop the rare earth elements resources from the geothermal waters, it is essential to understand the volumetric properties of the aqueous solution system to establish the relative thermodynamic model. In this study, densities of YCl3 (aq) at the molalities of 0.08837–1.60639 mol·kg−1 from 283.15 K to 363.15 K at 5 K intervals and ambient pressure were measured experimentally by an Anton Paar digital vibrating-tube densimeter. Based on experimental data, the volumetric properties including apparent molar volume (Vϕ) and the coefficient of thermal expansion of the solution (α) of the binary systems (YCl3 + H2O) were derived. The 3D diagram (mi, T, Vϕ) of apparent molar volumes against temperature and molality was plotted. On the basis of the Pitzer ion-interaction model of electrolyte, the Pitzer single-salt parameters ( β MX 0 v , β MX 1 v , and C MX v ) for YCl3 and temperature-dependence equation F(i, p, T) = a1 + a2ln(T/298.15) + a3(T-298.15) + a4/(620-T) + a5(T-227) as well as their coefficients ai (i = 1–5) in the binary system were obtained for the first time. The values of Pitzer single-salt parameters of YCl3 agree well with the calculated values corresponding to the temperature-dependence equations, indicating that single-salt parameters and temperature-dependent formula obtained in this work are reliable.

Highlights

Rare earth elements (REEs) are vital ingredients of modern technologies, especially in energy, environmental protection, digital technology, the nuclear industry, and medical applications
In nuclear medicine, many radioisotopes such as yttrium have been used in diagnostic or therapeutic procedures to treat a wide range of diseases, including cancer [8]. e continuously increasing demand for yttrium has led to the high economic importance of yttrium
It is well known that thermodynamic properties such as solubilities of phase equilibria and apparent molar volumes at wide temperatures are essential to explore novel methods for more effective and efficient extraction of yttrium and provide information about the ion interactions. erefore, revealing the ion-interaction to construct a thermodynamics model at multitemperatures for the binary system (YCl3 + H2O) is of great importance

Summary

Introduction

Rare earth elements (REEs) are vital ingredients of modern technologies, especially in energy, environmental protection, digital technology, the nuclear industry, and medical applications. E derived properties of apparent molar volumes (Vφ), partial molar volumes (Vφ), and the coefficients of thermal expansion of the solution (α) for YCl3 aqueous solutions were obtained, and their variation tendency against temperature and molality have been discussed in detail.

Results

Conclusion