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Isopiestic determination of the osmotic coefficients and Pitzer model representation for the Li2B4O7+LiCl+H2O system at T=298.15 K
Yang, Ji-Min1; Yao, Yan2; Xia, Qi-Ying1; Li, Bao-Hui1; Xu, Shu-Yong1; Yang, Jie1
2008-03-01
发表期刊JOURNAL OF SOLUTION CHEMISTRY
卷号37期号:3页码:377-389
文章类型Article
摘要Isopiestic molalities and water activities have been measured for the Li2B4O7+LiCl + H2O system at T=298.15 K using an improved isopiestic apparatus. Two types of osmotic coefficients, phi(S) and phi(E), were determined, where phi(S) is based on the stoichiometric molalities of the solute Li2B4O7(aq) and phi(E) is based on equilibrium molalities calculated by consideration of the equilibrium speciation of Li2B4O7 to partially form H3BO3, B(OH)(4)(-) and B3O3(OH)(4)(-). The stoichiometric equilibrium constant K-m for the aqueous speciation reaction was estimated. Two representations of the osmotic coefficients of Li2B4O7+LiCl+H2O were made with Pitzer's ion-interaction model. Model (1) involved representing the phi(S) values with six parameters based on considering the ionic interactions between Li+, Cl-, and B4O72- ; and model (2) involved representing the phi(E) values based on the calculated equilibrium speciation. Reasonable agreements were obtained between the experimental osmotic coefficient data and those calculated using the above models, with standard deviations of 0.075 and 0.0229, respectively, for these two models. The thermodynamic osmotic coefficients for the complex system containing polymeric boron anions and lithium cation was modelled and explained by use of Pitzer's ion-interaction model, with minor modifications in combination with speciation reaction equilibria.
关键词li2b4o7+licl+h2o Isopiestic Method Water Activity Pitzer Ion-interaction Model Osmotic Coefficient
WOS标题词Science & Technology ; Physical Sciences
关键词[WOS]LAKE BRINE SYSTEM ; THERMODYNAMIC PROPERTIES ; BORATE SOLUTIONS ; NATURAL-WATERS ; BORIC-ACID ; 25-DEGREES-C ; SODIUM ; TEMPERATURES ; PREDICTION ; MIXTURES
收录类别SCI
语种英语
WOS研究方向Chemistry
WOS类目Chemistry, Physical
WOS记录号WOS:000252976400006
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.isl.ac.cn/handle/363002/5837
专题青海盐湖研究所知识仓储
作者单位1.Linyi Normal Univ, Dept Chem, Linyi 276005, Peoples R China
2.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China
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GB/T 7714
Yang, Ji-Min,Yao, Yan,Xia, Qi-Ying,et al. Isopiestic determination of the osmotic coefficients and Pitzer model representation for the Li2B4O7+LiCl+H2O system at T=298.15 K[J]. JOURNAL OF SOLUTION CHEMISTRY,2008,37(3):377-389.
APA Yang, Ji-Min,Yao, Yan,Xia, Qi-Ying,Li, Bao-Hui,Xu, Shu-Yong,&Yang, Jie.(2008).Isopiestic determination of the osmotic coefficients and Pitzer model representation for the Li2B4O7+LiCl+H2O system at T=298.15 K.JOURNAL OF SOLUTION CHEMISTRY,37(3),377-389.
MLA Yang, Ji-Min,et al."Isopiestic determination of the osmotic coefficients and Pitzer model representation for the Li2B4O7+LiCl+H2O system at T=298.15 K".JOURNAL OF SOLUTION CHEMISTRY 37.3(2008):377-389.
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