Adsorption of Sulphonylureas by Carbon Black from Aqueous Solution

概要

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The adsorption of sulphonylureas by carbon black from aqueous solution was investigated in detail regarding the hydrophobic interaction. The adsorption isotherms obtained were well described with Langmuir equation. The adsorbed amount decreased with the increase in pH of buffer solution between 6 and 9,showing that pH had influence on the hydrophobic and hydrophilic balance of the molecule. The adsorbed amount increased with the increase in concentration of buffer solution at pH 7.0,showing that the concentration of buffer solution had influence on water molecules of carbon black surface. The decrease in adsorbed amount with addition of urea demonstrated that the adsorption of sulphonylureas proceeded on the hydrophobic interaction. The adsorbed amount of sulphonylureas by carbon black decreased with temperature, showing the entropy change of adsorption of sulphonylureas by carbon black from aqueous solution was apparently positive.
公益社団法人日本薬学会の論文
1978-05-25