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Structures of sodium vanadate solution under different conditions

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Abstract

Combined with Fourier transform infrared spectroscopy (FTIR) analysis of sodium vanadate solution, the relationship between conductivity and structure was investigated by measuring the electric conductivity of the solution under different alkali concentrations and molar ratios of NaOH to V2O5. Results suggest that the polymerization vanadium acid radical ions gradually transform into monomer with the solution diluting. When the solution is diluted to a certain extent, only the vanadium acid radical ion with V–OH chemical bond exists in the solution. At NaOH concentration of below 105.21 g·L−1, the vanadate anions mainly exist in the form of vanadium acid radical ion with V–OH chemical bond and the ion transference number is approximately from 0.58 to 0.82. In the medium NaOH concentration range of 105.21–117.03 g·L−1, the vanadate anions mostly exist in the form of vanadium acid radical ion with V–OH and V–O–V chemical bonds and the ion transference number is approximately 3.29. At NaOH concentration of above 117.03 g·L−1, vanadate anions exist in the form of vanadium acid radical ion with V–OH and V–O–V chemical bonds.

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Acknowledgments

This study was financially supported by the National Natural Science Foundation of China (No.51304129) and the Natural Science Foundation of Shandong Province (No.ZR2013EEM005).

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Authors and Affiliations

  1. School of Chemical Engineering, Shandong University of Technology, Zibo, 255049, China

    Ya-Li Zhang, Li-Qun Yang & Xian-Jin Yu

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  1. Ya-Li Zhang
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  2. Li-Qun Yang
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Correspondence to Ya-Li Zhang.

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Zhang, YL., Yang, LQ. & Yu, XJ. Structures of sodium vanadate solution under different conditions. Rare Met. 37, 59–65 (2018). https://doi.org/10.1007/s12598-015-0525-2

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  • DOI: https://doi.org/10.1007/s12598-015-0525-2

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