核废水中放射性核素^(54)Mn处理技术研究

Research on the Treatment Technology of Radioactive Nuclide^(54)Mn in Nuclear Wastewater

^(54)Mn主要来源于核反应堆冷却剂循环系统中结构材料的腐蚀与磨损产物,这些产物经中子活化生成^(54)Mn,可能对环境和人体健康构成辐射威胁。研究采用重铬酸钾、硫酸镁和盐酸多巴胺通过水热法合成了吸附材料Cr-OPC,利用傅里叶红外光谱仪分析了其结构,并探讨了离子浓度、pH、Zeta点位和吸附剂添加量等因素对吸附能力的影响。通过等温吸附实验数据拟合,揭示了吸附剂的吸附机理。实验结果表明,Cr-OPC对^(54)Mn具有较高的吸附效率,尤其在pH大于4时,吸附效率接近100%。Langmuir等温模型的拟合结果表明,吸附剂对^(54)Mn为单层吸附,且吸附容量随温度升高而增加。研究为含放射性核素^(54)Mn废水的处理提供了一种有效的吸附材料和处理方法。

^(54)Mn primarily originates from the corrosion and wear products of structural materials in the coolant circulation system of nuclear reactors.These products become^(54)Mn through neutron activation,which may pose a radiation threat to the environment and human health.The study synthesized an adsorption material Cr-OPC using potassium dichromate,magnesium sulfate,and dopamine hydrochloride through a hydrothermal method.The structure was analyzed using a Fourier transform infrared spectrometer,and the effects of ion concentration,pH,Zeta Potential,and adsorbent dosage on adsorption capacity were explored.The adsorption mechanism was revealed by fitting isothermal adsorption experimental data.The experimental results shows that Cr-OPC has a high adsorption efficiency for^(54)Mn,especially when the pH is greater than 4,the adsorption efficiency approaches 100%.The fitting results of the Langmuir isothermal model indicate that the adsorbent exhibits monolayer adsorption for^(54)Mn,and the adsorption capacity increases with rising temperature.The study provides an effective adsorption material and treatment method for the processing of radioactive isotope^(54)Mn-containing wastewater.