Isopiestic Measurements of Water Activity for the Li2SO4−MgSO4−H2O System at 323.15 and 373.15 K
Isopiestic Measurements of Water Activity for the Li2SO4−MgSO4−H2O System at 323.15 and 373.15 K
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323.15 和 373.15 K 下 Li2SO4·MgSO4·H2O 体系水活度的等压测量
DOI：
10.1021/acs.jced.6b00239
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发表时间：
2016
影响因子：
--
通讯作者：
Wolfgang Voigt
中科院分区：
文献类型：
--
作者：
Haitang Yang;Dewen Zeng;Qingwei Wang;Wolfgang Voigt
通过等压测量，详细确定了二元 Li2SO4-H2O 和 MgSO4-H2O 以及三元 Li2SO4-MgSO4-H2O 体系在 323.15 和 373.15 K 下的水活度。每次实验中平行样品的等压摩尔浓度相对偏差优于0.2%。将二元系统中的实验水活度与文献数据进行比较，结果吻合良好。结果表明，在盐浓度低于3 m时，Li2SO4-MgSO4-H2O体系的等压组成线服从Zdanovskii规则，而在3 m以上，组成线正偏离Zdanovskii规则。
The water activities for the binary Li2SO4–H2O and MgSO4–H2O, as well as the ternary Li2SO4–MgSO4–H2O systems at 323.15 and 373.15 K were elaborately determined by isopiestic measurements. The relative deviation of the isopiestic molality of parallel samples in each experimental run is better than 0.2%. The experimental water activities in the binary systems were compared with literature data and good agreement was found. The results obtained show that at salt concentration below 3 m the isopiestic composition lines of the Li2SO4–MgSO4–H2O system obey the Zdanovskii rule, whereas above 3 m the composition lines positively deviate from the Zdanovskii rule.