TY - JOUR
T1 - Multi-stress radioactive-tolerant Exiguobacterium acetylicum CR1 and its applicability to environmental cesium uptake bioremediation
AU - Oh, Seo Yeong
AU - Heo, Nam Su
AU - Shukla, Shruti
AU - Kang, Sung Min
AU - Lee, Ilsong
AU - Lee, Hoomin
AU - Bajpai, Vivek K.
AU - Jang, Sung Chan
AU - Han, Young Kyu
AU - Roh, Changhyun
AU - Huh, Yun Suk
N1 - Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2018/12/20
Y1 - 2018/12/20
N2 - 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.
AB - 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.
KW - Cesium (Cs) removal
KW - Cesium tolerant
KW - Exiguobacterium acetylicum CR1
KW - Gamma radiation resistant
KW - Soil bacterium
KW - Water treatment
UR - http://www.scopus.com/inward/record.url?scp=85054705675&partnerID=8YFLogxK
U2 - 10.1016/j.jclepro.2018.09.077
DO - 10.1016/j.jclepro.2018.09.077
M3 - Article
AN - SCOPUS:85054705675
SN - 0959-6526
VL - 205
SP - 281
EP - 290
JO - Journal of Cleaner Production
JF - Journal of Cleaner Production
ER -