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Citation: Wen Yan-Xuan, Wang Li-Sheng, Jin Zou-Mei. Simulation Study on Ion Exchange Kinetics of Magnesium Ion in Demagging Liquor of Phosphate Ore[J]. Acta Physico-Chimica Sinica, ;2003, 19(10): 913-916. doi: 10.3866/PKU.WHXB20031006 shu

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

1.
College of Materials Science and Engineer, South China University of Technology, Guangzhou　510640; College of Chemical Engineer, Sichuan University, Chengdu　610065

Received Date: 28 March 2003
Available Online: 15 October 2003

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.
- Demagging waste solution of phosphate ore;Ion exchange;Kinetics
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