铀与某些粘土矿物之间关系的初步研究

60年代初苏联的研究了蒙脱石、高岭石、蛭石、铝土矿、钠长石等对铀的吸附作用及这些矿物吸附铀与作用时间、温度、氢离子、溶液铀浓度之间的关系。认为粘土吸附铀与这些矿物的离子交换性能密切相关,且其吸附容量从蒙脱石向钠长石逐渐减少。

PRELIMINARY STUDY OF THE RELATIONSHIP BETWEEN URANIUM AND SOME CLAY MINERALS

This paper points out that expanding clay minerals can absorb uranium and gives a list of clay minerals with rich or poor uranium occuring in structural fracture zone.And characteristics of the clay minerals are described by means of electron microscope and various analyses such as differential thermal analysis, infrared absorbed spectral analysis, x-ray diffraction and chemical analysis.The conclusion is that the uranium content in the regular interstratified chlorite-montmorillonite mineral is the highest, even up to 0.246%.The main mineral,montmorillonite, plays an important role in absorbing uranium.The experiment data indicate that under the same conditions Na-montmorillonite absorbs more uranium than Ca-montmorillonitc. The mechanism of uranium absorption is, described as follows. The montmorillon-ites are characterized by ion-change ability and absorbing water, which can offer fasorable condition for uranuly ( UO ) moving into structural layers.In addition, because of the fine grain of the montmorillonites and their large sarface area they can absorb more uranium .Furthcrmore, the environment in which monimerillonites occur is favorable for uranium accumulation.