| 五硼酸铷溶液的物化性质及物种分布 |
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| 引用本文： | 苗军涛,房艳,房春晖,朱发岩,刘红艳,周永全,戈海文,孙鹏超,赵晓婵.五硼酸铷溶液的物化性质及物种分布[J].盐湖研究,2016,24(1). |
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| 作者姓名： | 苗军涛 房艳 房春晖 朱发岩 刘红艳 周永全 戈海文 孙鹏超 赵晓婵 |
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| 作者单位： | 中国科学院青海盐湖研究所,中国科学院青海盐湖研究所,中国科学院青海盐湖研究所,中国科学院青海盐湖研究所,中国科学院青海盐湖研究所,中国科学院青海盐湖研究所,中国科学院青海盐湖研究所,中国科学院青海盐湖研究所,中国科学院青海盐湖研究所 |
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| 基金项目： | 国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 摘 要： | 碳酸铷、硼酸化学计量比混合，蒸发溶液，直至五硼酸铷RbB5O8·4H2O晶体析出。经粉末X射线衍射（XRD）、拉曼光谱（Raman spectroscopy）、热重/微商热重/差示扫描量热（TG/DTG/DSC）、原子吸收光谱等实验方法，确定其化学组成及结构。298.15、333.15K时测量溶液的物理化学性质（密度、电导、pH），并与经验方程进行拟合，研究五硼酸铷溶液的物化性质随浓度、温度的变化规律。根据文献报道的平衡常数，实验测量的pH数据，采用牛顿迭代法进一步研究五硼酸铷溶液中主要存在的硼酸根离子对类型、含量以及物种的形成。
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| 关 键 词： | 五硼酸铷 物化性质 物种分布 多聚硼酸根阴离子 |
| 收稿时间： | 2015/12/16 0:00:00 |
| 修稿时间： | 2016/1/8 0:00:00 |
The Physicochemical Properties and Species Distribution of The Aqueous Rubidium Pentaborate solutions |
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| Miao Juntao,Fang yan,Fang Chunhui,Zhu Fayan,Liu Hongyan,Zhou Yongquan,Ge Haiwen,Sun Pengchao and Zhao Xiaochan.The Physicochemical Properties and Species Distribution of The Aqueous Rubidium Pentaborate solutions[J].Journal of Salt Lake Research,2016,24(1). |
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| Authors: | Miao Juntao Fang yan Fang Chunhui Zhu Fayan Liu Hongyan Zhou Yongquan Ge Haiwen Sun Pengchao and Zhao Xiaochan |
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| Institution: | Qinghai Institute of Salt Lakes, Chinese Academy of Sciences,Qinghai Institute of Salt Lakes, Chinese Academy of Sciences,Qinghai Institute of Salt Lakes, Chinese Academy of Sciences,Qinghai Institute of Salt Lakes, Chinese Academy of Sciences,Qinghai Institute of Salt Lakes, Chinese Academy of Sciences,Qinghai Institute of Salt Lakes, Chinese Academy of Sciences,Qinghai Institute of Salt Lakes, Chinese Academy of Sciences,Qinghai Institute fo Salt Lakes,Chinese Academy of Sciences,Qinghai Institute fo Salt Lakes,Chinese Academy of Sciences |
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| Abstract: | Hydrated rubidium pentaborate was precipitated via evaporating solution of rubidium carbonate and boric acid in stoichiometric proportions. The chemical composition and structural information about the synthesized compound were achieved using different methods of powder X-ray diffraction, Raman spectroscopy, TG/DTG/DSC and atomic absorption spectroscopy. Physicochemical property data, including density, electrical conductivity and pH data of aqueous hydrated rubidium pentaborate solutions, have been accurately determined at temperature of 298.15 and 333.15K, respectively. Furthermore, the empirical equations were used to fitting with the obtained experimental data. On the basis of these, the change rules were investigated in aqueous rubidium pentaborate solutions about the physicochemical properties when temperature and solution concentration varied. According to the equilibrium constants reported in literature and experimental pH data, besides, the type of different borate anions, content, and the speciation among different borate anions occurred in solution were studied by Newton iteration. |
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