韓国産ゼオライトの粒径別陽イオン交換容量

概要

論文の詳細を見る
The purpose of the present study was to see if the cation exchange capacity (CEO of a Korean zeolite is affected by the particle size. The sample was collected from Young-il, Kyungpook, Korea and dominated by mordenite and clinoptilolite. It was pulverized and sieved into four fractions of 1〜0.5,0.5〜0.25,0.25〜0.1,and < 0,1 mm. The magnitude of the measured CEC-values was not significantly affected by the particle size. This is well explained by that most of the cation-exchange sites of the zeolite exist in the pores and that the cation-exchange sites do not increase by pulverizing. The magnitude of the measured CEC-values, however, was dependent upon the cation species used for the measurement and increased in the order of Mg^<2+> < Ca^<2+> < K^+ < NH_4^+. We attempted to relate this sequence to the size of hydrated cations instead of dehydrated cations : the cation having the smaller ionic radius in the hydrated state could penetrate more easily into the pores of zeolite, giving the greater CEC-value.
日本粘土学会の論文
1987-03-01