Abstract
Structural investigation of absorbents at the molecular level are very important for obtaining knowledge of their solubility. EXAFS measurements of LiBr aqueous solutions in different concentrations and with another cation, such as potassium ion, K+, or calcium ion, Ca2+, were carried out. X-ray absorption spectra at the bromine K-edge were recorded for these solutions. Hydration numbers around Br– were obtained from these spectra by means of the curve-fitting method. The results showed that the hydration number around Br– differed with the concentration of the solution, and changed when other cations were added to the solution. The same results were obtained from the molecular dynamics (MD) simulation, and the hydration number around Br– can be reasonably explained by taking long-range structure into account. © 1999 Scripta Technica, Heat Trans Asian Res, 28(6): 513–527, 1999
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