偏硼酸锂、五硼酸锂溶液体积性质及离子作用模型  

Volumetric properties and ion-interaction models of aqueous solutions of lithium metaborate and lithium pentaborate

作　　者：戈海文[1,2] 王敏 GE Hai-wen;WANG Min(Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining 810008,China;Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province,Xining 810008,China)

机构地区：[1]中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室,青海西宁810008 [2]青海省盐湖资源化学重点实验室,青海西宁810008

出　　处：《高校化学工程学报》2019年第6期1323-1328,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(41503061)

摘　　要：采用U型振荡管密度仪测定LiB(OH)4(质量摩尔浓度为0.03~0.97mol×kg^-1)和LiB5O6(OH)4(质量摩尔浓度为0.03~1.13mol×kg^-1)溶液在288.15~323.15K下的密度,分别计算出LiB(OH)4和LiB5O6(OH)4在不同浓度和温度下的表观摩尔体积。基于密度测定结果,应用Pitzer电解质溶液离子相互作用表观摩尔体积模型,拟合获得LiB(OH)4和LiB5O6(OH)4在不同温度下的Pitzer单盐参数,并分别给出Pitzer单盐参数与温度的关联式。Densities of aqueous solutions of LiB(OH)4 and LiB5O6(OH)4 at solute molalities ranging from 0.03~0.97 and 0.03~1.13 mol×kg^-1 respectively were measured by a vibrating-tube densitometer under temperature intervals of 5 K from 288.15 to 323.15 K. The apparent molar volumes of LiB(OH)4 and LiB5O6(OH)4 were obtained based on the experimental density data. According to the Pitzer ion-interaction model of the apparent molar volume, the Pitzer single salt parameters of LiB(OH)4 and LiB5O6(OH)4 at different temperatures were obtained, and the correlation between Pitzer single salt parameters and temperature were built.

关 键 词：偏硼酸锂 五硼酸锂 表观摩尔体积 PITZER模型 

分 类 号：O642.5[理学—物理化学]