硫酸镁对硼酸介稳区性质的影响  

The Effect of Magnesium Sulfate on the Metastable Zone Property of Boric Acid

作　　者：李丽丽[1,2] 董亚萍[1] 彭姣玉[1] 李武[1] 孟庆芬[1] 

机构地区：[1]中国科学院青海盐湖研究所,青海西宁810008 [2]中国科学院大学,北京100049

出　　处：《盐湖研究》2013年第1期38-43,共6页Journal of Salt Lake Research

基　　金：国家自然科学基金(41273032);青海省科技厅项目(2009-G-202)

摘　　要：通过浊度法测定10℃～45℃范围内MgSO4-H3BO3-H2O体系中硼酸的溶解度及介稳区宽度,得到硼酸的成核方程,并计算其表观成核级数。实验结果表明,硫酸镁的存在降低了硼酸的溶解度;随着硫酸镁浓度的升高,硼酸的介稳区宽度先变宽后变窄;硫酸镁的加入使硼酸的表观成核级数增加。The solubility and metastable zone width of boric acid in MgSO4-H3BO3-H2O system were de- termined in the temperature range from 10℃ to 45℃ by turbidity method, the formulas of nucleation were obtained and the apparent nucleation orders of boric acid were calculated. The results showed that, the presence of magnesium sulfate decreases the solubility of boric acid; The metastable zone width of bo- ric acid first becomes wider and then narrower with increasing concentrations of magnesium sulfate; the addition of magnesium sulfate increases the apparent nucleation orders of boric acid.

关 键 词：硼酸 硫酸镁 溶解度 介稳区 

分 类 号：O645.5[理学—物理化学]