| 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,2017,25(1):30-36, 56. |
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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,中国科学院盐湖资源综合高效利用重点实验室, 青海西宁 810008;中国科学院大学,北京 100049,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,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,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,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;中国科学院大学,北京 100049,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,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,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;中国科学院大学,北京 100049,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;中国科学院大学,北京 100049 |
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| 基金项目： | 国家自然科学基金项目(21373251)；中国科学院知识创新工程重要方向项目 (KZCX2-EW-307) |
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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RbB_5O_8·4H_2O晶体析出。经粉末X射线衍射、拉曼光谱、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p H数据,采用牛顿迭代法进一步探讨了五硼酸铷溶液中主要存在的硼酸根离子物种分布规律。
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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 |
Physicochemical Properties and Species Distribution of Aqueous Rubidium Pentaborate solutions |
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| MIAO Jun-tao,FANG Yan,FANG Chun-hui,ZHU Fa-yan,LIU Hong-yan,ZHOU Yong-quan,GE Hai-wen,SUN Peng-chao and ZHAO Xiao-chan.Physicochemical Properties and Species Distribution of Aqueous Rubidium Pentaborate solutions[J].Journal of Salt Lake Research,2017,25(1):30-36, 56. |
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| Authors: | MIAO Jun-tao FANG Yan FANG Chun-hui ZHU Fa-yan LIU Hong-yan ZHOU Yong-quan GE Hai-wen SUN Peng-chao and ZHAO Xiao-chan |
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| Institution: | Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes,Chinese Academic of Sciences,Xinning,810008,China;University of Chinese Academic of Sciences,Beijing,100049,China,Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes,Chinese Academic of Sciences,Xinning,810008,China,Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes,Chinese Academic of Sciences,Xinning,810008,China,Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes,Chinese Academic of Sciences,Xinning,810008,China,Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes,Chinese Academic of Sciences,Xinning,810008,China;University of Chinese Academic of Sciences,Beijing,100049,China,Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes,Chinese Academic of Sciences,Xinning,810008,China,Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes,Chinese Academic of Sciences,Xinning,810008,China,Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes,Chinese Academic of Sciences,Xinning,810008,China;University of Chinese Academic of Sciences,Beijing,100049,China and Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes,Chinese Academic of Sciences,Xinning,810008,China;University of Chinese Academic of Sciences,Beijing,100049,China |
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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 properties including density,electrical conductivity and pH of aqueous rubidium pentaborate solutions,have been accurately determined at temperature of 298.15 and 333.15 K,respectively.Furthermore,the empirical equations were used to fitting with these experimental data.On the basis of these,the change rules of the physicochemical properties with temperature and concentration were investigated.According to the equilibrium constants reported in literature and experimental pH data,the polyborate anion distribntion were given by Newton iteration,besides,the speciation among deferent anions in solution were speculated. |
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