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碳酸根对磷酸钙沉淀反应回收磷的影响

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赵亚丽, 宋永会, 钱锋, 程建光, 梁慧. 碳酸根对磷酸钙沉淀反应回收磷的影响[J]. 环境工程学报, 2014, 8(1): 48-54.
引用本文: 赵亚丽, 宋永会, 钱锋, 程建光, 梁慧. 碳酸根对磷酸钙沉淀反应回收磷的影响[J]. 环境工程学报, 2014, 8(1): 48-54.
shu
Zhao Yali, Song Yonghui, Qian Feng, Cheng Jianguang, Liang Hui. Effect of carbonate on calcium phosphate precipitation for phosphorus recovery[J]. Chinese Journal of Environmental Engineering, 2014, 8(1): 48-54.
Citation: Zhao Yali, Song Yonghui, Qian Feng, Cheng Jianguang, Liang Hui. Effect of carbonate on calcium phosphate precipitation for phosphorus recovery[J]. Chinese Journal of Environmental Engineering, 2014, 8(1): 48-54.
shu

碳酸根对磷酸钙沉淀反应回收磷的影响

  • 1.

    中国环境科学研究院城市水环境科技创新基地, 北京 100012

  • 2.

    山东科技大学化学与环境工程学院, 青岛 266590

  • 基金项目:

    国家自然科学基金资助项目（51078339）

    “十一五”国家科技支撑计划项目（2009BADC2B）

  • 中图分类号: X703

Effect of carbonate on calcium phosphate precipitation for phosphorus recovery

  • 1.

    Scientific and Technological Innovation Base for Urban Water Environmental Research, Chinese Research Academy of Environmental Sciences, Beijing 100012, China

  • 2.

    College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266510, China

  • Fund Project:

  • 摘要: 以模拟的厌氧消化液为处理对象，通过小试实验，考察不同初始磷浓度CP、Ca/P物质的量比、pH和温度下，碳酸根（CO32-）对磷酸钙沉淀反应回收磷的影响；利用扫描电镜（SEM）、X射线衍射仪（XRD）和傅里叶变换红外光谱（FTIR）对沉淀产物进行表征。结果表明，高浓度的CO32-对以磷酸钙沉淀反应去除和回收磷的效率影响较大；CP相同时，CO32-浓度（CCO32-）越大，P的去除率越低，低CP（20 mg/L）时尤为显著；当CCO32-相同时，随着CP的增大，反应速率加快，P的去除率逐渐升高，但升高幅度越来越小；增大Ca/P比和pH能提高P的去除率，降低CO32-对磷酸钙沉淀反应的抑制作用，综合考虑实际效果，应选择Ca/P比为3.33，pH为9.0作为适宜的反应条件；升高温度对降低CO32-对磷酸钙沉淀反应的抑制作用贡献不大。在CP为60 mg/L，Ca/P比为1.67，pH为9.0，温度为20℃的条件下，当C CO32-为0时，得到的沉淀产物主要为羟基磷灰石HAP；当C CO32-为30 mmol/L时，得到的沉淀产物为磷酸钙和碳酸合磷灰石的混合物。
    Abstract: The effect of carbonate (CO32-) on the reaction of calcium phosphate precipitation at different initial phosphorus (P) concentrations, Ca/P ratios,pH values and temperatures were investigated using synthetic anaerobic digestion supernatant as treatment target at bench-scale. The precipitates were characterized by scanning electron microscope (SEM), X-ray Diffraction (XRD) and Fourier transform infrared spectrometer (FTIR).The results showed that the high concentration CO32- had more effect on the efficiency of phosphorus removal and recovery in the precipitated reaction of calcium phosphate. The phosphorus removal efficiency was lower when the CO32- concentration was higher at the same P concentration, especially at the low P concentration (20 mg/L). The phosphorus removal efficiency was higher but increased slowly when the initial P concentration increased and the reaction rate accelerated. The removal efficiency of phosphate also increased with the increase of Ca/P ratio and pH value and decreased with the decrease of CO32- concentration. The optimized reaction conditions were Ca/P ratio of 3.33 and pH value of 9.0 when compared the whole experimental results. There was no obvious decrease of the inhibitory effect of CO32- on the reaction of calcium phosphate precipitation when the solution temperature increased. Moreover, most of the obtained precipitate was hydroxyapatite under the conditions of no CO32-, CP of 60 mg/L, Ca/P of 1.67,pH value of 9.0 and temperature of 20℃. However, most of the obtained precipitates were the mixture of calcium phosphate and carbonate-hydroxyapatite when the CO32- concentration was 30 mmol/L.
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出版历程
  • 收稿日期:  2012-12-14
  • 刊出日期:  2014-01-03
赵亚丽, 宋永会, 钱锋, 程建光, 梁慧. 碳酸根对磷酸钙沉淀反应回收磷的影响[J]. 环境工程学报, 2014, 8(1): 48-54.
引用本文: 赵亚丽, 宋永会, 钱锋, 程建光, 梁慧. 碳酸根对磷酸钙沉淀反应回收磷的影响[J]. 环境工程学报, 2014, 8(1): 48-54.
shu
Zhao Yali, Song Yonghui, Qian Feng, Cheng Jianguang, Liang Hui. Effect of carbonate on calcium phosphate precipitation for phosphorus recovery[J]. Chinese Journal of Environmental Engineering, 2014, 8(1): 48-54.
Citation: Zhao Yali, Song Yonghui, Qian Feng, Cheng Jianguang, Liang Hui. Effect of carbonate on calcium phosphate precipitation for phosphorus recovery[J]. Chinese Journal of Environmental Engineering, 2014, 8(1): 48-54.
shu

碳酸根对磷酸钙沉淀反应回收磷的影响

  • 1.  中国环境科学研究院城市水环境科技创新基地, 北京 100012
  • 2.  山东科技大学化学与环境工程学院, 青岛 266590
  • 收稿日期:  2012-12-14
基金项目:

国家自然科学基金资助项目（51078339）

“十一五”国家科技支撑计划项目（2009BADC2B）

摘要: 以模拟的厌氧消化液为处理对象，通过小试实验，考察不同初始磷浓度CP、Ca/P物质的量比、pH和温度下，碳酸根（CO32-）对磷酸钙沉淀反应回收磷的影响；利用扫描电镜（SEM）、X射线衍射仪（XRD）和傅里叶变换红外光谱（FTIR）对沉淀产物进行表征。结果表明，高浓度的CO32-对以磷酸钙沉淀反应去除和回收磷的效率影响较大；CP相同时，CO32-浓度（CCO32-）越大，P的去除率越低，低CP（20 mg/L）时尤为显著；当CCO32-相同时，随着CP的增大，反应速率加快，P的去除率逐渐升高，但升高幅度越来越小；增大Ca/P比和pH能提高P的去除率，降低CO32-对磷酸钙沉淀反应的抑制作用，综合考虑实际效果，应选择Ca/P比为3.33，pH为9.0作为适宜的反应条件；升高温度对降低CO32-对磷酸钙沉淀反应的抑制作用贡献不大。在CP为60 mg/L，Ca/P比为1.67，pH为9.0，温度为20℃的条件下，当C CO32-为0时，得到的沉淀产物主要为羟基磷灰石HAP；当C CO32-为30 mmol/L时，得到的沉淀产物为磷酸钙和碳酸合磷灰石的混合物。

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