| Ca5（AsO4）3OH的溶解度与稳定性研究 |
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| 引用本文： | 许立巍,朱义年,刘辉利,龙腾锐.Ca5（AsO4）3OH的溶解度与稳定性研究[J].环境污染治理技术与设备,2010(11):2419-2424. |
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| 作者姓名： | 许立巍 朱义年 刘辉利 龙腾锐 |
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| 作者单位： | [1]重庆大学市政与环境工程学院,重庆400045 [2]桂林理工大学环境科学与工程学院,桂林541004 |
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| 基金项目： | 国家自然科学基金资助项目（40773059/D0309） |
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| 摘 要： | 通过在不同pH值,温度等条件下Ca5（AsO4）3OH的溶解,确定其稳定存在的pH值范围,得出它的溶度积和生成的自由能（ΔG0f）。结果表明,Ca5（AsO4）3OH在水中的溶解度和稳定范围与pH和温度有关,在酸性条件下（初始pH=2）它的溶解度较大,而且在水中的溶解度随着温度的升高而降低。利用PHREEQC程序计算确定Ca5（AsO4）3OH的溶度积为10-40.86,生成自由能ΔG0f为-5 063.53 kJ/mol。利用JADE5软件计算得到其晶格参数a=b=9.696,c=6.967和晶胞体积为567.304 3。
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| 关 键 词： | Ca5（AsO4）3OH 溶解度 生成自由能 |
Solubility and stability of Ca_5（AsO_4）_3OH |
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| Xu Liwei,Zhu Yinian Liu Huili Long Tengrui.Solubility and stability of Ca_5（AsO_4）_3OH[J].Techniques and Equipment for Environmental Pollution Control,2010(11):2419-2424. |
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| Authors: | Xu Liwei Zhu Yinian Liu Huili Long Tengrui |
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| Institution: | 1.School of Municipal and Environmental Engineering,Chongqing University,Chongqing 400045,China;2.College of Environmental Science and Engineering,Guilin University of Technology,Guilin 541004,China) |
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| Abstract: | Solubility of Ca5（AsO4）3OH was studied at different pH and temperatures to get its solubility product（Ksp） and formation free energy（ΔG0f）.The results showed that the solubility and stability of Ca5（AsO4）3OH were related to pH and temperature.The solubility of Ca5（AsO4）3OH was high in acidic environment（initial pH=2） and reduced with increasing temperature.PHREEQC program was applied to calculate the solubility product and formation free energy of Ca5（AsO4）3OH,which were determined to be 10-40.86 and-5 063.53 kJ/mol,respectively.JADE5 software was applied and determined that the crystal lattice parameters were a=b=9.696 ,c=6.967 and the unit cell volume was 567.304 3. |
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| Keywords: | Ca5（AsO4）3OH solubility free energy of formation |
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