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Alginate polyelectrolyte ionotropic gels

Part II Kinetics and mechanism of exchange of chelated nickel (II) by hydrogen ions in capillary ionotropic nickel alginate polymembrane gel complex

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Abstract

The kinetics and mechanism of exchange of Ni2+ by H+ ions in ionotropic nickel alginate polymembrane gels of capillary structure have been studied by pH-metric and conductimetric techniques. The rate of exchange conforms to; rate=k 1 [nickel alginate] [H+]- k −1 [alginic acid] [Ni2+] with k 1=6.34×10−2dm3mol−1s−1 and k −1=8.83×10−4 s−1 at 20°C, respectively. The activation parameters have been evaluated and a mechanism consistent with the kinetic data is discussed.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, Assiut University, 71516, Assiut, Egypt

    R. M. Hassan

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  1. R. M. Hassan
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Hassan, R.M. Alginate polyelectrolyte ionotropic gels. JOURNAL OF MATERIALS SCIENCE 28, 384–388 (1993). https://doi.org/10.1007/BF00357813

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  • DOI: https://doi.org/10.1007/BF00357813

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