Surfactant-based technologies have been studied for the treatment of radioactive waste containing isotopes of radium. Nevertheless, the use of combined processes to remove radium from radioactive oil sludge is scarce in the literature. The objective of this work was to investigate the potential of a non-ionic surfactant to remove radium from raw oil sludge (ROS) and pre-treated, microwave-irradiated oil sludge (POS). Characterization of ROS and POS was made using the following methods: Thermal Gravimetric Analysis, X-ray diffraction, Scanning Electron Microscopy coupled with Energy-Dispersive X-ray Spectroscopy, and gamma spectrometry. The effects of surfactant concentration (0.5–7.5%), temperature (25-60 °C), and contact time (30 and 60 min) were investigated. For ROS, little or no influence on the decontamination process was found for variations in the selected process parameters. For POS, the lowest surfactant concentration (2.5%) was the most efficient, removing about 94% of ²²⁶Ra and ²²⁸Ra. Neither contact time nor temperature affected removal. For ROS, removal percentages were 50–60% for ²²⁶Ra and 35–45% for ²²⁸Ra. The results indicated that the surfactant acted more efficiently in the decontamination of POS.

已经研究了基于表面活性剂的技术用于处理含有镭同位素的放射性废物。然而，文献中很少使用联合工艺从放射性油泥中去除镭。这项工作的目的是研究非离子表面活性剂从原料油泥 (ROS) 和预处理的微波辐照油泥 (POS) 中去除镭的潜力。使用以下方法对 ROS 和 POS 进行表征：热重分析、X 射线衍射、扫描电子显微镜结合能量色散 X 射线光谱和伽马光谱。研究了表面活性剂浓度 (0.5–7.5%)、温度 (25-60 °C) 和接触时间 (30 和 60 分钟) 的影响。对于 ROS，发现所选工艺参数的变化对净化过程几乎没有影响或没有影响。对于 POS，最低的表面活性剂浓度 (2.5%) 是最有效的，去除了大约 94%²²⁶拉和²²⁸拉。接触时间和温度都不影响去除。^{对于 ROS， 226} Ra的去除百分比为 50-60%，²²⁸ Ra 的去除百分比为35-45% 。结果表明，表面活性剂对 POS 的去污作用更有效。