碱性含铀废水处理试验研究

Experimental Study on Treatment of Alkaline Uranium Wastewater

采用石灰去除CO_3^(2-)—硫酸亚铁中和深度除铀—氯化钡除镭—污渣循环减容工艺处理碱性含铀废水,考察了石灰、硫酸亚铁、氯化钡用量等条件对铀、镭的去除效果。试验结果表明:当Ca(OH)_2用量为化学计量1.1倍、FeSO_4·7H_2O质量浓度为2.0g/L、氯化钡质量浓度为60mg/L时,铀质量浓度降至0.05mg/L以下,镭活度浓度降至1.0Bq/L以下,pH可控制在8.0左右,处理后的废水可达标排放。

Lime removing carbonate,ferrous sulphate neutralization and deep removing uranium,barium chloride removing radium,solution sludge recycle technology are studied on treatment of alkaline uranium wastewater.The dosage of lime,ferrous sulfate,barium chloride and other conditions for removing of uranium,radium are inspected.When the dosage of calcium hydroxide is 1.1 times stoichiometric,ρ(FeSO4·7H2O)is 2.0 g/L,ρ(BaCl)is 60 mg/L,the results show that the mass concentration of uranium can be reduced to below 0.05 g/L,the activity concentration of radium can be reduced to below 1.0 Bq/L,the pH can be controlled at around 8.0.The processed wastewater can meet discharged standard.