Sorption Selectivity Of Functionalized Mesoporous Silica Towards Cu+2 AND Pb+2 IONS
Keywords:
Mesoporous silica, L-cysteine, amine silanes, selectivityAbstract
This paper examines the selectivity of mesoporous silica materials functionalized with L-cysteine and amine silanes for Cu2+ and Pb2+ ions in aqueous solutions. The introduction of thiol (–SH) and amine (–NH₂) groups is shown to significantly increase the sorption capacity and selectivity of the adsorbent. The modified materials are found to exhibit increased selectivity for Cu²⁺ due to complexation with sulfur-containing groups, while Pb+2 preferentially interacts with amine centers. Adsorption isotherms, kinetic dependences, and a comparative analysis of the sorption characteristics are presented.
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