本研究评估了一种新型砂过滤工艺的使用情况，该工艺利用过滤砂的自然能力，通过使用定期稀酸冲洗来吸附镭，以保持其吸附能力。进行批量研究以确定分配系数，以便进行性能评估。使用部分软化的地下水进行的实验室中试研究表明，当使用pH 1（0）进行日常冲洗时，在存在铁絮体的情况下，该工艺能够将Ra浓度降低80%至90%。 36%）或pH值为2（0.04%）的盐酸。通过使用从城市现有砂滤器中获得的含9-11 pCi Ra/L的水进行现场研究，可以实现类似的去除效果，该城市的供水经过了除铁处理。当尝试同时去除铁和镭时，现场的去除量较少。此外，在连续流实验中获得的砂的总吸附能力的估计值通常显著大于基于批量结果的预测值。包括27个参考文献、表格和图表。

This study evaluated the use of a novel sand filtration process that exploits the natural capacity of filter sand to sorb radium through the use of a periodic dilute acid rinse to maintain its sorptive capacity. Batch studies were conducted to determine distribution coefficients so that performance estimates could be made. Laboratory pilot studies using a partially softened groundwater showed the process capable of reducing Ra concentrations by 80 to 90 percent in the presence of iron flocs when daily rinsing was practiced using pH 1 (0.36 percent) or pH 2 (0.04 percent) HCl. Similar removals could be achieved in field studies using water containing 9-11 pCi Ra/L obtained from the existing sand filters in a city whose supply is treated for iron removal. Removals in the field were less when simultaneous iron and radium removal was attempted. In addition, estimates of the total sorptive capacity of the sand obtained in continuous-flow experiments were generally significantly greater than those predicted based on batch results. Includes 27 references, tables, figures.