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从参数φ′~(1/2)出发,研究了水合金属氧化物、难溶性酸式盐和杂多酸盐的离子交换容量(IEC)与其组成的关系。对于前两者,IEC值与中心离子的φ′~(1/2)值(或平均φ′~(1/2)值)成线性关系。中心离子的价态高、原子量小及强拉电子效应的产生均有利于IEC值的提高。
Starting from the parameter φ ’~ (1/2), the relationship between ion exchange capacity (IEC) of hydrated metal oxides, insoluble acid salts and heteropoly acid salts and its composition was studied. For the first two, the IEC value is linear with the φ ’~ (1/2) value (or the average φ’ ~ (1/2) value) of the central ion. The high valence of the central ion, the small atomic weight and the strong pull-on electron effect are all conducive to the increase of the IEC value.