In this work, the magnetic hydroxyapatite composite (Fe3O4@HAP) was prepared and used to remove of U(VI). The characterizations of transmission electron microscope and vibrating sample magnetometer indicated that the average size and saturation magnetizations (Ms) of Fe3O4@HAP was about 360 nm and 20.89 emu g−1, respectively. The results of solid-phase extraction indicated that at pH 5.0, the removal efficiency of Fe3O4@HAP was more than 95% within 20 min. The maximum adsorption capacity (qm) of Fe3O4@HAP was 789.58 mg g−1. Therefore, Fe3O4@HAP may be a rapid and highly efficient magnetic adsorbent to remove of U(VI) from water.

中文翻译：

---

Fe3O4@羟基磷灰石磁性固相萃取水溶液中U(VI)

在这项工作中，制备了磁性羟基磷灰石复合材料（Fe3O4@HAP）并用于去除U（VI）。透射电子显微镜和振动样品磁强计的表征表明，Fe3O4@HAP 的平均尺寸和饱和磁化强度 (Ms) 分别约为 360 nm 和 20.89 emu g-1。固相萃取结果表明，在 pH 5.0 条件下，Fe3O4@HAP 在 20 分钟内的去除率超过 95%。Fe3O4@HAP 的最大吸附容量 (qm) 为 789.58 mg g-1。因此，Fe3O4@HAP 可能是一种快速高效的磁性吸附剂，可从水中去除 U(VI)。