Several industries using gamma sterilization techniques for food safety, and long shelf-life purposes. Nuclear energy production has increased the amount of spent nuclear fuel produced, which poses risks of severe diseases in human. Cesium is one of the most hazardous material can cause human exposure to air, water, and food. The efficient removal of cesium ions (Cs⁺) has been emphasized using biological control strategies. In this study, we isolated a new Cs⁺-tolerant (100, 500, and 750 ppm) and gamma radiation resistant (1, 3, and 5 kGy) soil bacterium (CR1) from the soil around a nuclear power plant in Korea, which was identified as Exiguobacterium acetylicum CR1 by 16S rRNA sequencing. E. acetylicum CR1 was found to be resistant to high doses of gamma radiation without any loss in Cs⁺ tolerance or survival. Furthermore, E. acetylicum CR1 was found to act as a microbiological control agent with respect to the removal of cesium from contaminated water. Interestingly, after gamma radiation exposure, E. acetylicum CR1 developed significantly (p < 0.05) greater Cs⁺ bio-sorption capacity than non-irradiated control cells (24.63 ± 0.02% vs. 12.54 ± 0.06%), which confirmed that gamma radiation had no negative impact on its ability to remove Cs⁺ or on its growth/survival. The ability of E. acetylicum CR1 to adsorb Cs⁺ from contaminated water samples or radioactive environmental waste suggests it has broad spectrum potential as an environmentally friendly remedial tool in the contexts of soil ecology, agriculture, crop management, food, and medicine.

几个行业使用伽马灭菌技术来确保食品安全和延长保质期。核能生产增加了乏核燃料的生产量，这构成了人类严重疾病的风险。铯是最危险的物质之一，可导致人体暴露于空气，水和食物。使用生物控制策略已经强调了有效去除铯离子（Cs ⁺）。在这项研究中，我们从韩国一家核电厂周围的土壤中分离出了一种新的耐Cs ⁺（100、500和750 ppm）和抗伽玛射线辐射（1、3和5 kGy）的土壤细菌（CR1），通过16S rRNA测序鉴定为乙酰基Exiguobacterium aceticum CR1。大肠杆菌发现CR1对高剂量的伽玛射线有抵抗力，而Cs ⁺耐受性或存活率没有任何损失。此外，就从污染水中去除铯而言，发现乙酰化大肠杆菌CR1起微生物控制剂的作用。有趣的是，在暴露于伽玛射线后，乙酰大肠杆菌CR1的 Cs ⁺生物吸附能力比未辐照的对照细胞显着提高（p <0.05）（24.63±0.02％对12.54±0.06％），这证实了伽玛射线具有对其清除Cs ^+的能力或其生长/生存没有负面影响。的能力E.乙酰CR1吸附铯⁺ 来自受污染的水样或放射性环境废物的数据表明，它在土壤生态学，农业，作物管理，食品和医药等方面具有广泛的潜力，可作为一种环境友好的补救工具。