Due to the growing demand for lithium, the exploitation of non-conventional lithium sources such as Li-bearing geothermal brines is currently on the rise. These brines contain up to 200 mg L⁻¹ of lithium along with a diverse range of other dissolved elements, including naturally occurring radionuclides. In this study, data from a radiochemical monitoring process performed during the pilot plant testing of direct lithium extraction (DLE) at a geothermal site in the Upper Rhine Graben (URG) are presented. The tests were conducted under thermodynamic p-T conditions of the geothermal plant (T = 60 °C, p = 18 bar). The results present an uptake of the long-lived radionuclides ²²⁶Ra (²²⁸Ra) and ²¹⁰Pb by the granulated lithium‑manganese-oxides (LMO) sorbent employed. Elevated pH values enhance the sorption of nuclides formed in the ThU decay series, due to the increased negative charge on the LMO surface. The radioactivity uptake on the sorbent was found to be time-dependent. Experiments with a 5-min contact time resulted in relatively low sorption capacities, while extending the sorption time to 30 min significantly increased the accumulation of Ra isotopes and ²¹⁰Pb on the sorbent surface. During the regeneration phase, the radioactive load on the LMO sorbent could be reduced using 0.5 M HCl. The mass balance analysis of the investigated radionuclides demonstrates desorption percentages ranging from 16% to 100% per extraction cycle.

由于锂需求的不断增长，含锂地热卤水等非常规锂源的开采目前呈上升趋势。这些盐水含有高达 200 mg L ^-1的锂以及各种其他溶解元素，包括天然存在的放射性核素。在这项研究中，介绍了在莱茵河上游地堑 (URG) 地热站点直接提锂 (DLE) 中试工厂测试期间进行的放射化学监测过程的数据。测试是在地热发电厂的热力学p - T条件下进行的（ T  = 60 °C，p  = 18 bar）。结果表明，所用的粒状锂锰氧化物 (LMO) 吸附剂吸收了长寿命放射性核素²²⁶ Ra ( ²²⁸ Ra) 和^{210 Pb。}由于 LMO 表面负电荷增加，pH 值升高增强了 Th U 衰变系列中形成的核素的吸附。发现吸附剂上的放射性吸收具有时间依赖性。接触时间为 5 分钟的实验导致吸附容量相对较低，而将吸附时间延长至 30 分钟则显着增加了 Ra 同位素和²¹⁰ Pb 在吸附剂表面的积累。在再生阶段，可以使用 0.5 M HCl 减少 LMO 吸附剂上的放射性负荷。所研究的放射性核素的质量平衡分析表明，每个提取循环的解吸百分比范围为 16% 至 100%。