Article
  • Adsorption Behavior of Sr Ion on Calcium-Alginate-Chitosan
  • Lan D, Bing D, Lanlan D, Qiong C, Yong Y, Yang D
  • Calcium-Alginate-Chitosan의 스트론튬 이온 흡착 거동
  • Lan D, Bing D, Lanlan D, Qiong C, Yong Y, Yang D
Abstract
Sodium alginate and chitosan are added to a CaCl2 solution to prepare calcium-alginate.chitosan and calciumalginate gels. After dehydration through stoving, two types of adsorbent particles are obtained. The adsorption process of the particles obtained for low concentrations of Sr2+ satisfies a second-order kinetic equation and the Freundlich adsorption model. The thermodynamic behaviors of the particles indicate that adsorption occurs via a spontaneous physical process. XPS pattern analysis is used to demonstrate the adsorption of Sr2+ by calcium alginate and chitosan. By building an interaction model of the molecules of chitosan and alginate with Ca2+ and Sr2+ to calculate energy parameters, Fukui index, Mulliken charge, and Mulliken population, adsorption of Sr2+ on the molecular chains of chitosan as well as the boundary of calcium-alginate.chitosan is observed to show weak stability; by contrast, adsorption between molecular chains is high.

Keywords: Ca-alginate-chitosan; adsorption; Sr2+; kinetics; thermodynamics.

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2023 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2014; 38(5): 557-565

    Published online Sep 25, 2014

  • Received on Dec 15, 2013
  • Accepted on Apr 20, 2014