The removal method of superstandard components of uranium acid seepage water from sulphur-containing uranium waste rock in a mining area was studied. Firstly, 1 g/L mineral powder was added to the wastewater exceeding the standard to remove Cd, Cu and part U, and then the pH of seepage water from the waste rock landfill on the south and north sides was adjusted from 2.78 and 2.66 to 4.70 and 4.30, respectively, and the optimal contact reaction time was 30 min. The effects of Mg(OH)₂, Ca(OH)₂, Na₂CO₃ and NaOH on the further treatment of U, Mn and Zn in the effluent treated by ore powder were compared. The results show that Ca(OH)₂ has the best removal effects on U, Mn and Zn.Under the conditions of 0.32 and 0.96 g/L of Ca(OH)₂ and pH of 7 ~ 8, the removal rate of U, Cu, Cd, Zn and Mn can reach over 99.8%, over 90%, over 90%, over 95% and over 75.5%, respectively. And the settling speed is fast, and the suspended liquid volume can be reduced by about 70% after standing for 60 min. The precise calculation of the change of ion concentration during the addition of Ca(OH)₂. The results of sediment characterization show that hydrotaltale-like substances are formed during the purification process,Mn²⁺ and Zn²⁺ ions entered the hydrotalc structure and are removed,and uranyl ions may be removed by electrostatic adsorption with hydrotalc, surface complexation or interlayer anion exchange.

uranium acidic wastewater  /  uranium  /  removal  /  mineral powder  /  Ca(OH)₂  /  hydrotalcite  /  superstandard component