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在实验上首次发现,粘土矿物为固体粒子的体系的E％-pH曲线之离子强度效应是“先右后左摆动现象”;而水合氧化物为固体粒子的体系则是“向左单向移动现象”。对应的等温线之离子强度效应则是“先下后上摆动”和“单向上移”现象,两类四现象一致。为解释上述诸现象,提出液-固界面分级离子/配位子交换-静电交换的复合模型作统一解释和定量处理。由粘土矿物和水合氧化物两类物质的结构可知,前者可发生两类交换作用,彼此消长时曲线位置产生双向摆动;后者只有界面分级离子/配位子交换,故曲线位置单向移动。模型计算结果与实验吻合。
It is found for the first time in experiments that the ionic strength effect of the E% -pH curve of a system in which clay minerals are solid particles is “a phenomenon of” swinging first to the right and left afterwards “and a system in which a hydrous oxide is a solid particle is” moving to the left in a single direction phenomenon“. The corresponding isotherms of the ionic strength effect is the ”first after the next on the swing“ and ”one-way up" phenomenon, the two types of four consistent. In order to explain the above phenomena, the composite model of liquid-solid interface hierarchical ion / ligand exchange-electrostatic exchange was proposed for unified interpretation and quantitative treatment. From the structure of clay minerals and hydrous oxides, we can see that the former can have two kinds of exchange effects, and the curve position can produce two-way swing when the two are experiencing each other. The latter is only interface-classified ion / ligand exchange, so the curve position moves unidirectionally. The model calculation results are in good agreement with the experiment.