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논문 기본 정보

자료유형
학술저널
저자정보
Niu Qianjin (University of South China) Li Chunguang (University of South China) Liu Zhenzhong (University of South China) Li Yongmei (University of South China) Meng Shuo (Disposal and Modeling, University of South China) He Xinqi (University of South China) Liu Xinfeng (University of South China) Wang Wenji (University of South China) He Meijiao (University of South China) Yang Xiaolei (University of South China) Liu Qi (University of South China) Liu Longcheng (University of South China)
저널정보
한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제54권 제10호
발행연도
2022.10
수록면
3,631 - 3,640 (10page)
DOI
10.1016/j.net.2022.04.022

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Uranium mill tailing ponds (UMTPs) are risk source of debris flow and a critical source of environmental U and Rn pollution. The technology of microbial induced calcium carbonate precipitation (MICP) has been extensively studied on reinforcement of UMTs, while little attention has been paid to the effects of MICP on U & Rn release, especially when incorporation of metakaolin and bacillus subtilis (MBS). In this study, the reinforcement and U & Rn immobilization role of MBS -MICP solidification in different grouting cycle for uranium mill tailings (UMTs) was comprehensively investigated. The results showed that under the action of about 166.7 g/L metakaolin and ~50% bacillus subtilis, the solidification cycle of MICP was shortened by 50%, the solidified bodies became brittle, and the axial stress increased by up to 7.9%, and U immobilization rates and Rn exhalation rates decrease by 12.6% and 0.8%, respectively. Therefore, the incorporation of MBS can enhance the triaxial compressive strength and improve the immobilization capacity of U and Rn of the UMTs bodies solidified during MICP, due to the reduction of pore volume and surface area, the formation of more crystals general gypsum and gismondine, as well as the enhancing of coprecipitation and encapsulation capacity

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