Journal of Membrane Science & Technology

Department of Chemistry, Faculty of Science, Assiut University, Egypt

Publications

• Research Article   
  Heterogeneous Equilibria: An Equilibrium Study of Ion Exchange Process between Hydrogen Ions and Divalent Metals Counter Ions in Some Coordination Biopolymer Metal-Alginate Gel Complexes
  Author(s): Refat M Hassan* and Samia M Ibrahim
  
  Heterogeneous chemical equilibrium for ion exchange process between divalent metal counter ions in the coordination biopolymer metal-alginate complexes and the H+ ions of HClO4 acid electrolyte at a constant ionic strength of 0.1 mol dm-3 have been investigated using complexometric and titrimetric techniques. The factors affected the ion exchange processes such as the nature of the complexes geometrical configuration, the ionic radii of chelated metal ions, the bonding strength between the metal ions and the functional groups of alginate macromolecule and the temperature have been examined. The thermodynamic parameters of the ion exchange equilibrium have been evaluated and discussed in terms of the coordination geometry, strength of chelation and complexes stabilities. The experimental results indicated that values of the equilibrium constants of exchang.. View more»
  

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