物理化学学报 >> 2003, Vol. 19 >> Issue (10): 913-916.doi: 10.3866/PKU.WHXB20031006

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模拟磷矿脱镁废水中镁离子的交换动力学研究

文衍宣;王励生;金作美   

  1. 华南理工大学材料科学与工程学院,广州　510640;四川大学化工学院,成都　610065
  • 收稿日期:2003-03-28 修回日期:2003-05-28 发布日期:2003-10-15
  • 通讯作者: 文衍宣 E-mail:wenyanxuan@163.com

Simulation Study on Ion Exchange Kinetics of Magnesium Ion in Demagging Liquor of Phosphate Ore

Wen Yan-Xuan;Wang Li-Sheng;Jin Zou-Mei   

  1. College of Materials Science and Engineer, South China University of Technology, Guangzhou　510640; College of Chemical Engineer, Sichuan University, Chengdu　610065
  • Received:2003-03-28 Revised:2003-05-28 Published:2003-10-15
  • Contact: Wen Yan-Xuan E-mail:wenyanxuan@163.com

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摘要： 用动边界模型积分方程描述模拟磷矿脱镁废水中Mg2＋在001×7×7型树脂上的有限浴交换动力学,得到了动力学总方程.Mg2＋的交换过程属颗粒扩散控制,表观活化能为23.45 kJ•mol－1,Mg2＋的表观反应级数为0.68.

关键词: 磷矿脱镁废水, 离子交换, 动力学

Abstract: The ion exchange kinetics with changing bulk concentration of Mg2＋ on strong acid resins(001×7×7) was studied. Increasing the initial concentration of Mg2＋ and reducing the particle radius can accelerate the exchange rate of Mg2＋ .After reaching 315 r•min－1,the stirring speed has little effect on the exchange rate. An integrating equation of moving boundary model was used to describe the kinetics with changing bulk concentration of Mg2＋,and the overall kinetically equation was obtained. The ion exchange process of Mg2＋ is controlled by ion diffusion through particles. The apparent activation energy is calculated to be 23.45 kJ•mol－1, and apparent reaction order of Mg2＋ is 0.68.

Key words: Demagging waste solution of phosphate ore, Ion exchange, Kinetics