机械搅拌-微滤组合工艺处理含锶、锰废水

Mechanical Stir-Microfiltration Combined Process for Treatment of Wastewater Containing Strontium and Manganese

放射性锶(90Sr)和放射性锰(54Mn)广泛存在于放射性废水中,给环境带来危害。为此,开发了机械搅拌—微滤组合工艺对其进行处理,并考察水温、碳酸钠投加量和离子强度对锶、锰去除效果的影响。结果显示:在较低水温、增大碳酸钠投加量和原水离子强度的情况下,有利于锶的去除。而增大碳酸钠投加量和减小原水离子强度情况下,有利于锰的去除。当Na2CO3投加量为1.0 g/L、温度为10℃、原水锶浓度为6.280 mg/L、锰浓度为5.160 mg/L时,锶和锰的去污因数分别达到673.6和1.09×104,浓缩倍数达到2.18×103。

Radioactive strontium （99Sr） and radioactive manganese （54Mn） widely exist in radio- active wastewater, and have a harmful effect on the environment. Mechanical stir -microfihration combined process was developed for the treatment of wastewater containing strontium and manganese. Influencing factors such as temperature, dosage of sodium carbonate and ionic strength were investigated. The results showed that the decrease in temperature and the increase in sodium carbonate dosage and ionic strength were all advantageous to the removal of strontium. The increase in sodium carbonate dosage and the decrease in ionic strength were both advantageous to the removal of manganese. The decontamination factors for strontium and manganese were 673.6 and 1.09 × 104, and the concentration factor was 2.18 × 103 when the sodium carbonate dosage was 1.0 g/L, temperature was 10 ℃, and the strontium and man- ganese concentrations in the raw water were 6.280 mg/L and 5. 160 mg/L, respectively.