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固液界面吸附动力学机理的研究对深入了解吸附规律具有重要意义.艾宏韬曾提出吸附动力学的基本公式,但对活化能的研究未予重视.陈松等虽测定了水合氧化钛在海水中吸附铀的活化能,但均假设吸附反应仅是单向进行.本文从质量作用定律出发,对正反两方向的反应速率及吸附剂、吸附质的有关参数均予以考虑,导出了分别适用于速率较小或较大两种情况下活化能的实验测定方法,并分别以水合氧化钛在海水中吸附铀及水合氧化铁吸附铅、铜的动力学实验结果为例,加以验证.
The study on the adsorption kinetics of solid-liquid interface is of great significance for understanding the adsorption law thoroughly.I Ai-tao proposed the basic formula of adsorption kinetics, but paid little attention to the study of activation energy. However, it is assumed that the adsorption reaction is only one-way .In this paper, starting from the law of mass action, the reaction rate in both positive and negative directions and the parameters of adsorbents and adsorbates are taken into account, It is suitable for the experimental determination of activation energy in both small and large rates. The kinetic experimental results of adsorption of lead and copper on hydrated titanium oxide in seawater and hydrated iron oxide are also taken as examples respectively and verified.