中文摘要：

选取某铀尾矿周边地下水作为研究对象,对比分析地下水与排放水在主要水化学成分、水化学参数、水化学类型及放射性元素铀和微量元素氟含量上的差异,探明铀尾矿库对其周边地下水的影响程度.分析结果表明：地下水主要水化学成分为HCO3^-和Na^＋,水化学类型以HCO3·Cl-Ca·Na为主,排放水主要水化学成分为SO4^2-和Ca^2＋,水化学类型以SO4-Ca为主.说明在主要水化学成分、水化学参数、水化学类型上,可能尾矿库对地下水的影响不大;地下水中铀和氟含量分别超过美国EPA标准和我国《地下水质量标准》,超标率分别为100%和85.7%.可能是受矿山开釆产生的废石和铀尾矿库堆积的矿砂及p H的影响,说明尾矿库对地下水铀、氟含量的增加有一定影响.

英文摘要：

To evaluate the impact of uranium tailings on the surrounding groundwater, the differences of main chemical composition,water chemistry parameters,hydrochemistry type and contents of radioactive element uranium and trace elements fluorine between groundwater and discharge water were analyzed in this paper. Experimental results show that the main chemical composition of groundwater were HCO3^-and Na^＋,and hydrochemical type was mainly HCO3·Cl-Ca·Na.The main water chemical composition of the discharge water was SO4^2-and Ca^2＋,and hydrochemistry type was mainly SO4-Ca. The results suggest the impact of the uranium tailings on the main chemical components and types of water chemistry probably was minimal. The contents of uranium and fluorine in the groundwater exceeded the limits of EPA standard and the groundwater quality standard of China respectively,and over standard rates were 100% and 85. 7%,respectively. This result is attributed to the effect by waste rock of uranium mining,stacking ore of tailings and p H,and the increase of the uranium content and fluorine of groundwater resulting from uranium tailings.