首页|Microbial-driven ectopic uranium extraction with net electrical energy production

Microbial-driven ectopic uranium extraction with net electrical energy production

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The extraction of uranium(U)from U-bearing wastewater is of paramount importance for mitigating negative environmental impacts and recovering U resources.Microbial reduction of soluble hexavalent uranium(U(Ⅵ))to insoluble tetravalent uranium(U(Ⅳ))holds immense potential for this purpose,but its practical application has been impeded by the challenges associated with managing U-bacterial mixtures and the biotoxicity of U.To address these challenges,we present a novel spontaneous microbial electrochemical(SMEC)method that spatially decoupled the microbial oxidation reaction and the U(Ⅵ)reduction reaction.Our results demonstrated stable and efficient U extraction with net electrical energy production,which was achieved with both synthetic and real wastewater.U(Ⅵ)removal occurred via diffusion-controlled U(Ⅵ)-to-U(Ⅳ)reduction-precipitation at the cathode,and the UⅣO2 deposited on the surface of the cathode contributed to the stability and durability of the abiotic U(Ⅵ)reduction.Metagenomic sequencing revealed the formation of efficient electroactive communities on the anodic biofilm and enrichment of the key functional genes and metabolic pathways involved in electron transfer,energy metabolism,the TCA cycle,and acetate metabolism,which indicated the ectopic reduction of U(Ⅵ)at the cathode.Our study represents a significant advancement in the cost-effective recovery of U from U(Ⅵ)-bearing wastewater and may open a new avenue for sustainable uranium extraction.

U(Ⅵ)bioreductionElectricity productionReaction decouplingUranium-bearing wastewaterBiofilm microbiome

Xin Tang、Yin Ye、Chunlin Wang、Bingqian Wang、Zemin Qin、Cui Li、Yanlong Chen、Yuheng Wang、Zhiling Li、Miao Lv、Aijie Wang、Fan Chen

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School of Ecology and Environment,Northwestern Polytechnical University,Xi'an 710129,China

School of Materials Science and Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China

State Key Laboratory of Urban Water Resource and Environment,School of Environment,Harbin Institute of Technology,Harbin 150090,China

Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu 611756,China

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国家自然科学基金国家自然科学基金

5220020242077352

2024

10.1007/s11783-024-1764-y

环境科学与工程前沿
高等教育出版社

环境科学与工程前沿

影响因子：0.545
ISSN：2095-2201
年,卷(期)：2024.18(1)
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