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本文测定了甲酸、乙酸、丙酸和苯甲酸在强碱性阴离子交换树脂上的吸附等温线,观测到了甲酸、乙酸和丙酸的超当量吸附。通过对吸附了上述四种有机羧酸的离子交换树脂的红外光谱的研究,探讨了造成超当量吸附的原因,结果表明其原因是有机羧酸以多聚体形式占据交换位置。用Bull方程求算了甲酸和苯甲酸在强碱性阴离子交换树脂上的标准吸附自由能。
In this paper, the adsorption isotherms of formic acid, acetic acid, propionic acid and benzoic acid on strongly basic anion exchange resins were determined. The super-equivalent adsorption of formic acid, acetic acid and propionic acid was observed. By studying the IR spectra of the ion exchange resins adsorbing the above four kinds of organic carboxylic acids, the reason for causing super merit adsorption was discussed. The reason is that the organic carboxylic acids occupy the exchange sites in the form of multimers. Bull equation was used to calculate the standard adsorption free energy of formic acid and benzoic acid on strongly basic anion exchange resin.