Adsorption of metal halides from ethanol solutions by a 3-n-propylpyridiniumsilsesquioxane chloride-coated silica gel surface

摘要: Abstract 3-n-Propylpyridiniumsilsesquioxane chloride polymer, abbreviated as SiPy+Cl−, was used to coat a porous silica gel, SiO2, surface form the chemically modified solid SiO2/SiPy+Cl−. The resulting polymer film well adhered and presented an ion exchange capacity of 0.74 mmol g−1. Metal halides, MClz [M = Fe(III), Cu(II), Zn(II)], were adsorbed by from ethanol solutions neutral species forming anionic complexes described equation: mSiO2/SiPy+Cl−+ MClz⇄ (SiO2/SiPy+)m[MClz+m]m−, where [MClz+m]m− on are FeCl4−, ZnCl42−, CuCl42−. Accurate estimates specific sorption capacities heterogeneous stability constants immobilized metal determined with aid computational procedures.