化工学报 ›› 2003, Vol. 54 ›› Issue (6): 802-806.

• 生物化学工程、制药、食品和天然产物加工 • 上一篇    下一篇

离子取代凝胶——ACA离子取代动力学模型

陈益清;孙多先;孙绵方   

  1. 天津大学化工学院;加拿大多伦多大学生理系
  • 出版日期:2003-06-25 发布日期:2003-06-25

ION REPLACEMENT GEL:ION REPLACEMENT KINETICS MODEL OF ACA

CHEN Yiqing;SUN Duoxian;Anthony M. Sun   

  • Online:2003-06-25 Published:2003-06-25

摘要: 用动边界模型描述了海藻酸-壳聚糖-海藻酸(ACA)离子取代凝胶对2价离子的取代动力学过程.模型具有较好的可靠性,ACA离子取代凝胶对2价离子的取代属于颗粒扩散控制.ACA离子取代凝胶对Pb2+的反应级数是0.76.

关键词:

离子取代凝胶, ACA微胶囊, 取代动力学, 动边界模型, 海藻酸

Abstract: ACA ion replacement gel is a novel ion adsorbent and is hopeful to be used to cure human toxicosis metallicus. In this paper the ion replacement kinetics process of Alginate-Chitosan-Alginate(ACA) and the mutual replacement process of Calcium Alginate(A-Ca) and Alginate-Chitosan-Alginate-Calcium(ACA-Ca) gel beads for Pb2+are studied by mobile boundary model. The model has high reliability. The ion replacement process is controlled by Particle Diffusion Control (PDC). The apparent diffusion coefficient is higher with increasing concentration of Pb2+ and is linearly related to R-2. The reaction order of ACA for Pb2+is 0.76.

Key words:

离子取代凝胶, ACA微胶囊, 取代动力学, 动边界模型, 海藻酸