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pH对磷酸铵镁结晶介稳区、诱导期和反应速率的影响

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刘志, 邱立平, 王嘉斌, 谢康, 王东, 孙成江. pH对磷酸铵镁结晶介稳区、诱导期和反应速率的影响[J]. 环境工程学报, 2015, 9(1): 89-94. doi: 10.12030/j.cjee.20150115
引用本文: 刘志, 邱立平, 王嘉斌, 谢康, 王东, 孙成江. pH对磷酸铵镁结晶介稳区、诱导期和反应速率的影响[J]. 环境工程学报, 2015, 9(1): 89-94. doi: 10.12030/j.cjee.20150115
shu
Liu Zhi, Qiu Liping, Wang Jiabin, Xie Kang, Wang Dong, Sun Chengjiang. Influence of pH on crystallization metastable zone,induction period and crystallization rate of magnesium ammonium phosphate[J]. Chinese Journal of Environmental Engineering, 2015, 9(1): 89-94. doi: 10.12030/j.cjee.20150115
Citation: Liu Zhi, Qiu Liping, Wang Jiabin, Xie Kang, Wang Dong, Sun Chengjiang. Influence of pH on crystallization metastable zone,induction period and crystallization rate of magnesium ammonium phosphate[J]. Chinese Journal of Environmental Engineering, 2015, 9(1): 89-94. doi: 10.12030/j.cjee.20150115
shu

pH对磷酸铵镁结晶介稳区、诱导期和反应速率的影响

  • 1.

    济南大学土木建筑学院, 济南 250022

  • 2.

    北京工业大学建筑工程学院, 北京 100022

  • 基金项目:

    国家自然科学基金资助项目(50978121,51278225)

    山东省自然科学基金资助项目(ZR2011EEM018)

    济南市科技计划(高校院所自主创新)(201302079)

  • 中图分类号: X703.1

Influence of pH on crystallization metastable zone,induction period and crystallization rate of magnesium ammonium phosphate

  • 1.

    School of Civil Engineering and Architecture, University of Jinan, Jinan 250022, China

  • 2.

    The College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100022, China

  • Fund Project:

  • 摘要: 以pH为控制参数,利用自组装激光测量装置测定了4、20、30和40℃时,磷酸铵镁在水溶液中的溶解度、超饱和度和介稳区宽度等基础数据,分析了不同温度和pH下磷酸铵镁结晶介稳区的变化规律,考察了pH对磷酸铵镁结晶诱导期和结晶反应速率的影响。结果表明,提高溶液的pH,可降低磷酸铵镁在水溶液中的溶解度和超饱和度,但同时磷酸铵镁结晶介稳区宽度有所增加;磷酸铵镁的溶解度和超饱和度随温度的升高呈现上升的趋势,而磷酸铵镁的结晶介稳区宽度则随温度的升高而变窄,提高溶液中MAP的物质浓度也会压缩结晶介稳区宽度;随着溶液pH的升高,磷酸铵镁的结晶诱导期逐渐缩短,同时其结晶反应速率也有明显的提升。在磷酸铵镁结晶除磷过程中,可以通过控制pH来优化反应工艺条件,促进磷酸铵镁结晶反应的进行。
    Abstract: The solubility, supersaturation and metastable zone width of magnesium ammonium phosphate (MAP) in aqueous solution were measured at 4, 20, 30 and 40℃ by laser device using the pH value as the control parameter.While the changing of metastable zone, the induction period and the crystal reaction rate of MAP crystallization were investigated simultaneously.The results showed that to raise pH value could decline the solubility and supersaturation of MAP, but enlarged the metastable zone width.However, the solubility and supersaturation of MAP showed an upward trend with the increasing of temperature, as well as the crystallization metastable zone width would be narrowed with the increasing of temperature or MAP concentration.It was also observed that the MAP crystallization induction period was gradually shortened and the crystallization reaction rate was significantly improved with the increasing of pH value.Generally, in the crystallization phosphorus removal process, the crystallization reaction of MAP could be promoted with the optimizing of crystallization process by pH controlling.
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出版历程
  • 收稿日期:  2014-02-15
  • 刊出日期:  2014-12-30
刘志, 邱立平, 王嘉斌, 谢康, 王东, 孙成江. pH对磷酸铵镁结晶介稳区、诱导期和反应速率的影响[J]. 环境工程学报, 2015, 9(1): 89-94. doi: 10.12030/j.cjee.20150115
引用本文: 刘志, 邱立平, 王嘉斌, 谢康, 王东, 孙成江. pH对磷酸铵镁结晶介稳区、诱导期和反应速率的影响[J]. 环境工程学报, 2015, 9(1): 89-94. doi: 10.12030/j.cjee.20150115
shu
Liu Zhi, Qiu Liping, Wang Jiabin, Xie Kang, Wang Dong, Sun Chengjiang. Influence of pH on crystallization metastable zone,induction period and crystallization rate of magnesium ammonium phosphate[J]. Chinese Journal of Environmental Engineering, 2015, 9(1): 89-94. doi: 10.12030/j.cjee.20150115
Citation: Liu Zhi, Qiu Liping, Wang Jiabin, Xie Kang, Wang Dong, Sun Chengjiang. Influence of pH on crystallization metastable zone,induction period and crystallization rate of magnesium ammonium phosphate[J]. Chinese Journal of Environmental Engineering, 2015, 9(1): 89-94. doi: 10.12030/j.cjee.20150115
shu

pH对磷酸铵镁结晶介稳区、诱导期和反应速率的影响

  • 1.  济南大学土木建筑学院, 济南 250022
  • 2.  北京工业大学建筑工程学院, 北京 100022
  • 收稿日期:  2014-02-15
基金项目:

国家自然科学基金资助项目(50978121,51278225)

山东省自然科学基金资助项目(ZR2011EEM018)

济南市科技计划(高校院所自主创新)(201302079)

摘要: 以pH为控制参数,利用自组装激光测量装置测定了4、20、30和40℃时,磷酸铵镁在水溶液中的溶解度、超饱和度和介稳区宽度等基础数据,分析了不同温度和pH下磷酸铵镁结晶介稳区的变化规律,考察了pH对磷酸铵镁结晶诱导期和结晶反应速率的影响。结果表明,提高溶液的pH,可降低磷酸铵镁在水溶液中的溶解度和超饱和度,但同时磷酸铵镁结晶介稳区宽度有所增加;磷酸铵镁的溶解度和超饱和度随温度的升高呈现上升的趋势,而磷酸铵镁的结晶介稳区宽度则随温度的升高而变窄,提高溶液中MAP的物质浓度也会压缩结晶介稳区宽度;随着溶液pH的升高,磷酸铵镁的结晶诱导期逐渐缩短,同时其结晶反应速率也有明显的提升。在磷酸铵镁结晶除磷过程中,可以通过控制pH来优化反应工艺条件,促进磷酸铵镁结晶反应的进行。

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