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The efficiency of remediation of seepage containing uranium using phosphate as PRB material was investigated by batch experiment and column experiment. The batch experiment showed the uranium concentration in leachate was gradually decreased with the increase of Ca3(PO4)2 dosage and contact temperature, the optimum dosing amount of Ca3(PO4)2 is 0.13mg at 25℃ and 30℃,35℃, however ,is 0.11mg at 40℃. The column experiment showed calcium phosphate could reduce slightly concentration of uranium in leachate, removal rate of uranium was not high ,the range of removal rate was from 34.2%~73.5% in the early stage of experiment , and was from 12.4%~23.0% in middle and later stage of experiment. Thus, using Ca3(PO4)2 as PRB material to remedy acidi seepage containing uranium from tailings is not feasible. Keywords-seepage; remediation; phosphate; PRB

Study on Efficiency of Remediation of Seepage Containing Uranium with Phosphate as PRB Material