Abstract:A technology of removal thallium from thallium-bearing seepage water by oxidation precipitation was studied to solve the problem of the thallium exceeding the standard in a uranium mine tailings pond waste water in Guangdong province. The results show that the thallium content of wastewater can be reduced to less than 0.5ug/L by neutralizing with lime with the pH between 9 and 10 and adding oxidizing agent dosage of 2mL /L, which meets the local standard of Guangdong Province. The engineering application results show that the process runs stably and the effect of thallium removal is good. The thallium content is maintained at about 1ug/L and the cost of the reagent per ton is 0.99 Yuan. This process is a simple, effective, economical, and feasible treatment process for thallium contained seepage water and can be used as a technical reservation for thallium wastewater treatment for other uranium mines.