Isopiestic Determination of Unsaturated and NaNO3-Saturated H2O + NaNO3 + Y(NO3)3 + La(NO3)3 Systems and Representation wit

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• 作者：Mei He ; Qiang Zha ; Biao Li ; Zhi-Chang Wang
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2011
• 出版时间：October 13, 2011
• 年：2011
• 卷：56
• 期：10
• 页码：3800-3806
• 全文大小：784K
• 年卷期：v.56,no.10(October 13, 2011)
• ISSN：1520-5134

文摘

Isopiestic osmotic coefficients were determined for the unsaturated and NaNO₃-saturated H₂O + NaNO₃ + Y(NO₃)₃ + La(NO₃)₃ system up to the maximum ionic strength I = 22 mol路kg^鈥? at 298.15 K. The experimental results were represented by a modified Pitzer model (J. Phys. Chem. B2007, 111, 3704). The isopiestic data were found to closely fit a modified Zdanovskii鈥揝tokes鈥?Robinson model for the unsaturated system and Wang鈥檚 ideal鈥搇ike solution model (Ber. Bunsen鈥?i>Ges. Phys. Chem.1998, 102, 1045) for the NaNO₃-saturated quaternary system, respectively, which indicate that there is nonzero interchange energy between NaNO₃ and each rare earth nitrate and a zero interchange energy between the unlike rare earth nitrates. The isopiestic osmotic coefficient measurements and the Pitzer model representations for the NaNO₃-saturated quaternary systems are in good agreement with the ideal鈥搇ike solution model.