In this study, a new strategy for improving the radionuclide bio-decontamination (RBD) activity of microalgae by screening a better strain with high potential for biomineral production has been proposed. A noninvasive dielectrophoresis (DEP)-based microalgae screening microplatform has been used to select the highly capable microalgae in RBD. Microalgae (Chlorella vulgaris KMMCC9) with a high degree of competence in strontium (Sr) removal were successfully segregated against Chlorella vulgaris KCTC AG10002 that has relatively weak Sr removal activity under an AC electric field. C. vulgaris KMMCC9 with higher Sr biomineral competence (HSC) was also successfully segregated against others with lower Sr biomineral competence (LSC). Furthermore, after the screening and large-scale cultivation of C. vulgaris KMMCC9 with HSC, the microalgae showed highly effective Sr bio-decontamination in both non-radioactive and radioactive Sr contaminated water compared to wild-type (WT).

中文翻译：

---

通过筛选用于Sr生物矿化的高效微藻来增强放射性核素的生物净化作用†

在这项研究中，提出了一种新的策略，通过筛选具有较高生物矿物质生产潜力的更好菌株来提高微藻的放射性核素生物净化（RBD）活性。基于非侵入性介电电泳（DEP）的微藻筛选微平台已用于选择RBD中的高能微藻。具有高水平的锶（Sr）去除能力的微藻（Chlorella vulgaris KMMCC9）已成功分离出对抗小球藻KCTC AG10002，在交流电场下，该球藻的Sr去除活性相对较弱。C.寻常型KMMCC9具有较高Sr生物矿物质能力（HSC）的人也成功地与其他具有较低Sr生物矿物质能力（LSC）的人隔离。此外，与野生型（WT）相比，在筛选和大规模培养具有HSC的寻常型梭状芽胞菌KMMCC9之后，微藻类在非放射性和放射性Sr污染的水中均显示出高效的Sr生物净化作用。