Column experiments on remedy acid seepage water from U-containing debris with PRB

Column experiments on remediation of acid seepage water from U-containing debris using slated lime and silica sand mixture as PRB material have been done. The results showed that those mixture good results on treatment of acid seepage water. 1 unit volume mixture can neutralize 108.3, 53.5 and 45.9 unit volume acid seepage water of pH 3.12 with 1:5, 1:7 and 1:9 slated lime to sand mass Ratio, respectively. They also showed good results on U removal with less than 0.05 mg/L uranium concentration in filtrate when pH was no less than 6.5 and fade removing results of sulfate radical. The permeability of the mixture with 1:5 mass ratio was decreased from 10.9 m/d to 6.1 m/d, but the other two had no obviously change.