摘要： 以⁸⁸Sr作为模拟非放射性同位素，对电解法原位合成锰氧化物处理模拟核电厂放射性废水中Sr²⁺的工艺条件进行了研究。考察了电解电压、反应时间、反应结束后搅拌时间、温度以及pH对出水Sr²⁺质量浓度的影响，并通过正交试验得出最佳反应条件。结果表明，在模拟废水Sr²⁺初始质量浓度为5 mg/L条件下，最佳工艺条件：电解电压为7 V，反应温度为50℃，pH为10，电解时间为30 min，电解结束后搅拌时间为20 min，此条件下出水残余Sr²⁺为0.264 mg/L。在最佳工艺条件下，经XRD分析沉渣为Mn₃O₄。整个电解过程符合零级动力学，拟合动力学方程为c_t=c₀-0.159 1t。

关键词: 原位合成, 电解法, 含锶放射性废水

Abstract: The research on the technological conditions for the treatment of simulated radioactive Sr²⁺-containing wastewater in a nuclear power plant by electrolysis of in-situ synthesis of manganese oxide has been accomplished, using ⁸⁸Sr as simulated nonradioactive isotope. The influences of electrolysis voltage,reaction time,stirring time,temperature and pH on the mass concentration of Sr²⁺ in effluent have been investigated,and the reaction conditions obtained by orthogonal tests. The results show that when the initial mass concentration of Sr²⁺ in the simulated wastewater is 5 mg/L,the optimal technological conditions are as follows,the electrolysis voltage is 7 V,reaction temperature is 50℃,pH is 10,electrolysis time is 30 min,and after finishing the electrolysis process the stirring time is 20 min. Under these conditions,the concentration of residual Sr²⁺ in the effluent is 0.264 mg/L. Under optimal conditions,the sediment analyzed by means of XRD is Mn₃O₄. The whole electrolysis process conforms to zero order kinetics,and the fitting kinetics equation is c_t=c₀-0.159 1t.

Key words: in situ synthesis, electrolysis, radioactive Sr²⁺-containing wastewater

中图分类号: 

• X703.1