| 等压法测定Li2SO4-MgSO4-H2O体系的渗透和活度系数 |
| |
| 引用本文： | 张忠,姚燕,宋彭生,陈敬清. 等压法测定Li2SO4-MgSO4-H2O体系的渗透和活度系数[J]. 物理化学学报, 1993, 9(3): 366-373. DOI: 10.3866/PKU.WHXB19930315 |
| |
| 作者姓名： | 张忠 姚燕 宋彭生 陈敬清 |
| |
| 作者单位： | Institute of Salt Lakes, Academia Sinica, Xining 810008 |
| |
| 摘 要： | 在25 ℃下, 离子强度范围分别为0.2—8.7、0.6—12.7和1.4—13.5 mol·kg~(-1)时, 测定了纯Li_2SO_4、MgSO_4及Li_2SO_4-MgSO_4混盐水溶液的渗透系数. 计算了Pitzer方程和Scatchard方程的离子作用参数. 用上述两种方程及由热力学关系式直接推导出的Mckay-Perring方程计算并比较了Li_2SO_4和MgSO_4在混合溶液中的平均活度系数, 三者在实验误差范围内一致. 利用获得的Pitzer参数计算该体系的溶解度与文献值基本一致.
|
| 关 键 词： | 渗透系数 活度系数 Pitzer方程 Scatchard方程 溶解度 等压法 |
| 收稿时间： | 1991-10-11 |
| 修稿时间： | 1992-07-20 |
ISOPIESTIC DETERMINATION OF THE OSMOTIC AND ACTIVITY COEFFICIENTS OF AQUEOUS MIXTURES OF Li_2SO_4 AND MgSO_4 |
| |
| Zhang Zhong Yao Yan Song Pengsheng Chen Jingqing. ISOPIESTIC DETERMINATION OF THE OSMOTIC AND ACTIVITY COEFFICIENTS OF AQUEOUS MIXTURES OF Li_2SO_4 AND MgSO_4[J]. Acta Physico-Chimica Sinica, 1993, 9(3): 366-373. DOI: 10.3866/PKU.WHXB19930315 |
| |
| Authors: | Zhang Zhong Yao Yan Song Pengsheng Chen Jingqing |
| |
| Affiliation: | Institute of Salt Lakes, Academia Sinica, Xining 810008 |
| |
| Abstract: | The osmotic coefficients of aqueous mixtures of Li_2SO_4 and MgSO_4 have been measured from 1.4 to 13.5 mol·(kg)~(-1) at 25 ℃ by using the isopiestic method. In the ranges of 0.2—8.7 and 0.6—12.7 mol·(kg)~(-1) the osmotic coefficients of Li_2SO_4 and MgSO_4 were also reported respectively. Ion interaction parameters of Pitzer model and Scatchard model have been calculated from these measurements. In comparison with Mckay-Perring method, the osmotic and activity coefficients for Li_2SO_4-MgSO_4 mixtures are fairly reliably represented by both Pitzer's equation and Scatchard's neutral electrolyte equation. The predicted solubilities for this system using Pitzer's approach show good agreement with experimental results. |
| |
| Keywords: | Osmotic coefficient Activity coefficient Pitzer equation Scatchard equation Mckay-Perring method Solubility |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《物理化学学报》浏览原始摘要信息 |
|
点击此处可从《物理化学学报》下载全文 |
