Membrane and Water Treatment

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Permeability of anion-exchange membrane for Cl- ions. Dialysis of hydrochloride acid in the presence of nickel chloride

  • Palaty, Zdenek (Institute of Environmental and Chemical Engineering, Faculty of Chemical Technology, University of Pardubice) ;
  • Bendova, Helena (Institute of Environmental and Chemical Engineering, Faculty of Chemical Technology, University of Pardubice)
  • Received : 2009.04.07
  • Accepted : 2009.09.15
  • Published : 2010.01.25
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Abstract

Using a conventional two-compartment cell with stirrers the separation of an aqueous solution of HCl-$NiCl_2$ by an anion-exchange membrane Neosepta-AFN was investigated. The dialysis process was characterized by the permeability coefficient of the membrane towards to $Cl^-$ ions. This quantity was determined by the numerical integration of equations, which describe the time dependence of the total concentration of $Cl^-$ ions in compartment initially filled with stripping agent (water), combined with an optimizing procedure. The analysis of the experimental results showed that this permeability coefficient is a satisfactory characteristic for the process studied. It can be graphically correlated with the initial acid and initial salt concentrations in the compartment initially filled with acid+salt mixture.

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References

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