我国各地膨润土的表面积研究

采用乙二醇吸附法考察了我国各地膨润土的表面积,讨论了膨润土表面积的矿床矿样间差异性,并对膨润土表面积与其他物化性质间的相关性进行了分析.研究结果表明,供试验膨润土样品间表面积有一定的差异,其中临安和夏子街精膨润土样品的表面积较大,红泉膨润土样品的表面积最低;膨润土样品表面积在矿床类型间和矿样间的差异没有明显的规律性;膨润土样品的内表面积介于316-544.6 m2/g之间,对膨润土样品总表面积的贡献很大.膨润土的内表面积与蒙脱石含量、阳离子交换容量呈正相关关系.图1,表2,参10.

The surface area of various bentonites

The surface properties of bentonites were investigated by the method of adsorption of ethylene glycol. The relationship among the surface properties of bentonites and their other properties was analyzed. The difference of the surface property among the samples and deposits was discussed. The results showed that the surface areas of bentonites differ one another to a degree. The surface areas of Lin An a nd Xia Zi Jie-jing samples are higher, and the surface area of Hong Quan sample is lowest. There is no obvious correlation among the samples and deposits of bentonites. The inner surface areas of bentonite samples are between 316 m2/g and 544. 6 m2/g, and they take the major proportion of the surface areas of bentonites. The positive co-relationship exists between the inner surface areas of bentonites and the content of montmorillonite. There is also positive co- relationship between the inner surface areas of bentonite sampls and cation exchange capacities, 1fig. ,2tabs. ,10refs.