我国西南某铀矿水冶尾矿库的退役治理

Remediation of Out-of-Service Tailing Reservoir of A Uranium Mill in Southwest China

介绍了我国西南某铀矿尾矿库的污染状况和治理措施，重点介绍了降低氡的析出覆盖层的组成和处理酸性渗出水的渗透反应墙（permeable reactive barriers）技术以及施工。治理后，^222Rn析出率平均值降为0.68 Bq／（m^2·s），γ环境辐射剂量率降低到（28～176）×10^-8 Gy／h，渗出水pH值为8.3，金属铀浓度0．03mg／L，SO4^2-为180mg／L，并对存在问题进行分析与讨论。

The paper describes the pollution conditions of the tailing reservoir of a uranium mine in Southwest China and the measures taken to control the pollution, with the highlight on the composition of the covering layer for reducing radon emission and the technology and construction of the permeable reactive barriers for treating acidic seepage water. After the remediation, the average ^222Rn emission is reduced to 0.68 Bq/（ m2 · s） and the environment radiation rate to（28 ～176） × 10^-8 Gy/h and the pH value of the seepage water is 8.3, metal uranium concentration 0.03mg/L and SO4^2- 180mg/L. The existing problems are analyzed and discussed.