Uranium is a relatively active and chemically toxic natural radionuclide, its enrichment in the environment poses a serious threat to human health and ecosystems. It is necessary to dispose the uranium contaminated soil safely and efficiently. In this study, the effect of coal gangue-based geopolymers on the solidification of uranium-contaminated soil was examined using a single factor experiment. The highest compressive strength of the solidified body reached 24.6 MPa, and the highest fixation efficiency of uranium reached 77.44%. The results show that lower liquid-to-solid ratio, higher alkali activator content and lower alkali activator modulus promote the solidification of uranium.

铀是一种相对活跃且具有化学毒性的天然放射性核素，它在环境中的富集对人类健康和生态系统构成严重威胁。必须安全有效地处置受铀污染的土壤。在这项研究中，煤矸石基地质聚合物对铀污染土壤固化的影响使用单因素试验进行了检验。凝固体的最高抗压强度达到24.6 MPa，铀的最高固定效率达到77.44%。结果表明，较低的液固比、较高的碱活化剂含量和较低的碱活化剂模量促进了铀的凝固。