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多孔水化硅酸钙的制备及其磷回收特性

吉芳英 关 伟 周卫威 姜 宁 陈晴空 晏 鹏

吉芳英, 关 伟, 周卫威, 姜 宁, 陈晴空, 晏 鹏. 多孔水化硅酸钙的制备及其磷回收特性[J]. 环境科学研究, 2013, 26(8): 885-891.
引用本文: 吉芳英, 关 伟, 周卫威, 姜 宁, 陈晴空, 晏 鹏. 多孔水化硅酸钙的制备及其磷回收特性[J]. 环境科学研究, 2013, 26(8): 885-891.
JI Fang-ying, GUAN Wei, ZHOU Wei-wei, JIANG Ning, CHEN Qing-kong, YAN Peng. Preparation and Phosphorus Recovery Properties of Porous Calcium Silicate Hydrate[J]. Research of Environmental Sciences, 2013, 26(8): 885-891.
Citation: JI Fang-ying, GUAN Wei, ZHOU Wei-wei, JIANG Ning, CHEN Qing-kong, YAN Peng. Preparation and Phosphorus Recovery Properties of Porous Calcium Silicate Hydrate[J]. Research of Environmental Sciences, 2013, 26(8): 885-891.

多孔水化硅酸钙的制备及其磷回收特性

基金项目: 国家水体污染控制与治理科技重大专项(2009ZX07315); 重庆市重大科技专项(CSTC, 2008AB7133)

Preparation and Phosphorus Recovery Properties of Porous Calcium Silicate Hydrate

  • 摘要: 为实现磷资源的可持续利用,以环境废弃物电石渣为钙质材料,以白碳黑为硅质材料合成CSH(水化硅酸钙),以该材料为晶种,以结晶形成羟基磷灰石的形式从含磷废水中回收磷,重点研究了不同钙硅比〔c(CaO)/c(SiO2)〕条件下制备的CSH对含磷废水中磷的回收特性. 结果表明,钙硅比为1.8∶1时所得的CSH结构更疏松、表面分布有较多的孔隙, 较大的比表面积使其具有较好的溶钙能力. 钙硅比为1.8∶1的CSH最佳磷回收工艺条件:反应时间为60min,CSH投加量为4g/L,搅拌强度为40r/min. 在该条件下重复除磷15次以后,回收产物中w(P)达到17.56%,说明CSH具有良好的磷回收性能. 对回收磷前后的CSH进行了XRD图谱分析和FTIR分析发现,溶液中的磷主要生成了羟基磷灰石并嵌入到CSH中. 基于回收磷的目的,CSH可以用于处理ρ(P)较高的工业废水,或者是生物除磷系统中的污泥厌氧释磷液中,回收磷后的产品可作为含磷矿石或者磷肥加以利用.

     

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出版历程
  • 收稿日期:  2013-03-21
  • 修回日期:  2013-05-18
  • 刊出日期:  2013-08-25

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