Polythermal study of kinetics and equilibrium for hydrogen ion sorption on aminosilica

A.A.Samoteikin, Yu.V.Kholin, V.N.Zaitsev*, N.R.Sumskaya*

V.Karazin Kharkiv National University, 4 Svobody Sq., 61077 Kharkiv, Ukraine
*Chemical Department, T.Shevchenko Kyiv National University, 64 Volodymirskaya St., 01033 Kyiv, Ukraine

Received October 28, 1998

The model of sorption from a semi-infinite solution has been established to be applicable to describe the hydrogen ion sorption on aminosilica. The sorption process has been found to include two stages, namely, the fast and low ones. The transfer of hydrogen ions and counter-ions from the solution to complexing chemically modified silicas phase has been found to be an endothermal process and to occur under the enthropy increase.

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