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The silylating agent 3-trimethoxysilyl-1-propanethiol was immobilized on silica gel. Sulphur analysis showed 0.98 mmol of thiol groups per gram of support. These groups chemisorbed divalent cations: nickel, cobalt, copper, and mercury in the pH range from 1 to 6. The adsorption is more significant for mercury in relation to the other cations in the pH range studied. The primary amines, methylamine,...
A 2 4-1 fractional factorial design is employed to study Cu(II) adsorption on organofunctionalized silicas. Two types of immobilized silicas, Sil-et-1 and Sil-et-2, two solvents, water and ethanol, two copper salts, chloride and acetate, as well as 100 and 200 mg quantities of silica are used. For this design, substituting water for ethanol results in an average increase in copper...
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