Ion Exchange Multicomponent Dynamics on the Basis of the Surface Complexation Theory for Uptake of Ions Due to Lewis Acid/Lewis Base Interactions

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The description of multicomponent equilibria for the sorption of ions onto charged surfaces by means of the Surface Complexation Theory (“SCT_model”) has been elaborated by German researchers. Such approach is included into the solution of the problem of multicomponent nonlinear dynamics in ion exchange column with using the equilibria on the basis of the SCT_model extended to the description of the competitive adsorption of heavy metal salts and strong acids onto weakly basic anion exchanger such as Purolite A109 and PEI-CS-07. Unique properties of these resins are due to the LEWIS-base properties of amino groups. As a consequence, they are able to undergo coordination bonding with LEWIS acids such as heavy metals.

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