Journal of South China University of Technology (Natural Science Edition) ›› 2007, Vol. 35 ›› Issue (7): 57-61.

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Effect of Ionic Strength on Ion-Exchange Equilibrium of Taurine

Song Feng1  Li Zhong1  Xia Qi-bin1  Sun Hui-li2   

  1. 1. Key Laboratory of Enhanced Heat Transfer and Energy Conservation of the Ministry of Education ,South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China;2. South China Sea Institute of Oceanology , Chinese Academy of Sciences , Guangzhou 510301 , Guangdong , China
  • Received:2006-11-30 Online:2007-07-25 Published:2007-07-25
  • Contact: 宋峰(1977-)，男，博士生，主要从事吸附分离研究。 E-mail:fsong@scut. edu.cn
  • About author:宋峰(1977-)，男，博士生，主要从事吸附分离研究。
  • Supported by:

    国家自然科学基金资助项目(20336020)

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Abstract:

In this paper , the effects of ionic strength of solution on the ion-exchange equilibria of taurine/OH - system on anion exchange resin D290 were investigated by means of static adsorption , and the equilibrium uptake isotherms of taurine on the alkali anion exchange resin were measured at different ionic strengths. The results show that , with the increase in ionic strength , the adsorbed amount of taurine on the resin D290 , the distribution coefficient λTau and the fraction of zwitterion Tau±all decrease , while the pH value of the solution at the equilibrium and the content of anionic taurine Tau - increase. Moreover , it is found that , at a certain taurine concentration , the increase in ionic strength may improve the selectivity of the anion resin for taurine.

Key words: ion exchange, taurine, ionic strength, amino acid, phase equilibrium