文献类型：期刊文献

英文题名：Stable immobilization of uranium in iron containing environments with microbial consortia enriched via two steps accumulation method

作者：Zhu, Yuling[1];Sheng, Yating[1];Liu, Yuxin[1];Chen, Jiemin[1];He, Xiaoyun[1];Wang, Wenzhong[1];Hu, Baowei[1]

机构：[1]Shaoxing Univ, Sch Life Sci, Huancheng West Rd 508, Shaoxing 312000, Peoples R China

年份：2022

卷号：294

外文期刊名：ENVIRONMENTAL POLLUTION

收录：SCI-EXPANDED(收录号：WOS:000758423600001)、、EI(收录号：20214911276031)、Scopus(收录号：2-s2.0-85120413356)、WOS

基金：This research work was supported by the 2020 National College Students Innovation and Entrepreneurship Training Program (202010349024).

语种：英文

外文关键词：Uranium (U); Microbial consortium; Iron (Fe); Co-precipitation

外文摘要：The stable stabilization of uranium (U) in iron (Fe) containing environments is restricted by the reoxidation of UO2. In the current study, based on air reoxidation tests, we propose a novel two steps accumulation method to enrich microbial consortia from paddy soil. The constructed microbial consortia, denoted as the Fe-U bacteria, can co-precipitate U and Fe to form stable Fe-U solids. Column experiments running for 4 months demonstrated the production of U(IV)-O-Fe(II) precipitates containing maximum of 39.51% uranium in the presence of Fe-U bacteria. The reoxidation experiments revealed the U(IV)-O-Fe(II) precipitates were more stable than UO2. 16S rDNA high throughput sequencing analysis demonstrated that Acinetobacter and Stenotrophomonas were responsible for Fe and U precipitation, while, Caulobacteraceae and Aminobacter were crucial for the formation of U(VI)-PO4 chemicals. The proposed two steps accumulation method has an extraordinary application potential in stable immobilization of uranium in iron containing environments.