碱性含铀废水处理试验研究
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摘要
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(FeSO_4·7H_2O)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.
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(FeSO_4·7H_2O)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.
引文
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[2]马尧,胡宝群,孙占学.矿山废水处理的研究综述[J].铀矿冶,2006,25(4):199-203.
[3]张建国,王亮,薛永社,等.某铀矿山酸性工艺废水处理研究[J].铀矿冶,2010,29(4):210-213.
[4]戴文忠.磷酸盐法处理含铀废水[J].铀矿冶,1991,10(3):48-52.
[5]任俊树,牟涛,杨胜亚,等.絮凝沉淀处理含盐量较高的铀、钚低放废水[J].核化学与放射化学,2008,30(4):201-205.
[6]常青.水处理絮凝学[M].北京:化学工业出版社,2003:59-62.
[7]罗明标,刘淑娟,余亨华.氢氧化镁处理含铀放射性废水的研究[J].水处理技术,2002,28(5):274-277.
[8]肖甲元.用氯化钡-碳酸钠法从铀水冶酸性废水中除镭的研究[J].铀矿冶,1998,17(3):205-209.
[9]许道明,杨志成,陈英杰.氯化钡-石灰沉淀法处理酸法铀水冶厂尾矿坝废水[J].铀矿冶,1983,2(4):47-52.
[10]钟平汝,丁桐森,古江汉.铀堆浸废水中和沉渣减容与改性方法研究[J].铀矿冶,1997,16(2):100-109.