Article
Environmental Sciences
Liting Hao, Xinli Wang, Jinkai Shi, Lin Li, Xiaodi Hao
Summary: This study investigated the feasibility of using washing water of rice (WWR) to biologically remove vanadium (V) released into the environment. The V(V) removal efficiency increased up to 56.6% with increasing dosage of WWR over a 7-day trial. The results demonstrated that WWR could serve as carbon and microbial sources for biologically reducing V(V). Using domesticated sludge as the inoculum enhanced V(V) detoxification performance, with 95.5% V(V) being removed in the inoculated system for 5 days. Soluble V(V) was transformed into insoluble V(IV) (VO2), which could be further removed with precipitation. In addition to ABC transporters, a two-component system was also involved in V(V) reduction. The study confirmed the potential of WWR for V(V) bio-detoxification.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Geochemistry & Geophysics
Susan Glasauer, Sirine C. Fakra, Sarah Schooling, Peter Weidler, Tolek Tyliszczak, David K. Shuh
Summary: Recent studies have shown that dissimilatory metal reducing bacteria can impact the fate and transport of uranium in anaerobic subsurface environments. Most research efforts have focused on the reduction of soluble U(VI) to insoluble uraninite by these bacteria, but less is known about the reduction of uranium bound in minerals. This study found that the bacteria could reduce uranium and vanadium in solution, but not uranium bound in minerals. Furthermore, the toxicity of uranium affected bacterial growth and biofilm formation, while vanadium did not.
Article
Engineering, Environmental
Zhongli Wang, Baogang Zhang, Chao He, Jiaxin Shi, Mengxiong Wu, Jianhua Guo
Summary: Mixotrophic microbial V(V) reduction using acetate and elemental sulfur as joint electron donors can enhance V(V) removal performance, reduce organic dosage, and avoid excessive sulfate accumulation. Different techniques confirmed deposited vanadium (IV) as the main reduction product, and organic metabolites and sulfate-reducing bacteria played important roles in V(V) detoxification.
Article
Engineering, Environmental
Huan Liu, Siming Chen, Jianping Lu, Qimin Li, Jialin Li, Baogang Zhang
Summary: Mining and smelting of vanadium uranium ore leads to the release and coexistence of vanadium and uranium in the environment, posing severe risks. This study investigated the feasibility of synchronous removal of pentavalent vanadium (V(V)) and hexavalent uranium (U(VI)) using a mixotrophic column reactor packed with woodchips and elemental sulfur (S-0). The results showed that the removal efficiencies of U(VI) and V(VI) ranged from 55.1 to 80.7% and 52.2 to 99.5%, respectively. Several functional V(V) and U(VI) reducing microorganisms were identified, and they formed close partnerships. The study suggests that mixotrophic processes offer promising strategies for the simultaneous management of V(V) and U(VI) contaminated groundwater.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Liting Hao, Yuanyuan He, Chen Shi, Xiaodi Hao
Summary: The study found that increasing the initial V(v) concentration decreases the removal efficiency, while the straw dosage is positively correlated with removal efficiency within a certain range. Microbial activity is considered a major factor in V(v) bio-reduction.
Article
Engineering, Environmental
Xin Zheng, Bo Zhao, Chunguang Liu
Summary: The study found that thermophilic hydrogen-producing bacteria can effectively use glucose as an electron donor to reduce V(V) to V(IV) through biological and chemical pathways at higher temperatures. Addition of glucose enhances V(V) reduction better, and thermophilic hydrogen-producing bacteria regulate cellular metabolism and secrete extracellular polymers during the reduction process.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2021)
Article
Environmental Sciences
Liting Hao, Yongjie Liu, Nan Chen, Xiaodi Hao, Baogang Zhang, Chuanping Feng
Summary: This study demonstrates that using pine sawdust as a sole carbon source, combined with the addition of medical stone and phosphate rock, can effectively enhance microbial removal efficiency of V(V). Microbiological analysis showed that certain microbes contribute to the reduction of V(V) and specific functional species aid in the degradation of sawdust. The research provides a potential approach for microbially removing V(V) from contaminated groundwater and managing agricultural and forestry waste.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Haishuang Wang, Nan Chen, Chuanping Feng, Yang Deng, Wang Lu
Summary: In this study, it was found that microorganisms may be the driving force to distinguish vanadium release and reduction processes in a complex contaminated system with a liquid carbon source. Experiments were conducted to observe the variation of nitrate and V(v) under anaerobic conditions with different liquid carbon sources. The results showed that certain microbial genera were associated with the release and reduction of V(v), providing a potential bioremediation strategy for nitrate and V(v) co-contaminated environments.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2023)
Article
Environmental Sciences
Stephan Hilpmann, Andre Rossberg, Robin Steudtner, Bjorn Drobot, Rene Huebner, Frank Bok, Damien Prieur, Stephen Bauters, Kristina O. Kvashnina, Thorsten Stumpf, Andrea Cherkouk
Summary: Microbial U(VI) reduction can influence uranium mobility in contaminated subsurface environments and impact the disposal of high-level radioactive waste. This study investigated the reduction of U(VI) by the sulfate-reducing bacterium Desulfosporosinus hippei DSM 8344T, which showed fast removal of uranium in artificial Opalinus Clay pore water. Findings from spectroscopic techniques revealed the presence of U(IV) and intermediate U(V) species during the process.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
P. J. Nolan, Sharon E. Bone, Kate M. Campbell, Donald Pan, Olivia M. Healy, Marty Stange, John R. Bargar, Karrie A. Weber
Summary: In the presence of complexing ligands under oxidizing conditions, low uranium concentrations are maintained in groundwater in an alluvial aquifer. The groundwater is saturated with respect to calcite and contains elevated levels of carbonate alkalinity. Groundwater geochemical modeling indicates equilibrium between calcite and/or a calcium-uranyl-carbonate mineral with the groundwater.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Jianping Lu, Baogang Zhang, Rongyue Geng, Guoxi Lian, Hailiang Dong
Summary: This study demonstrates the successful application of zerovalent iron (Fe(0)) for the biological reduction of uranium (VI) [U(VI)]. The experiments conducted in a continuous-flow biological column showed that Fe(0) supported U(VI) reduction achieved a maximum removal efficiency of 100% and a capacity of 46.4 +/- 0.52 g/(m(3).d). The longevity of Fe(0) was also significantly increased. Metagenomic analysis revealed the upregulation of genes involved in U(VI) reduction and Fe(II) oxidation. This research provides a promising remediation strategy for U(VI)-polluted aquifers.
Article
Chemistry, Multidisciplinary
Mingxing Zhang, Chengyu Liang, Guo-Dong Cheng, Junchang Chen, Yumin Wang, Linwei He, Liwei Cheng, Shicheng Gong, Duo Zhang, Jiong Li, Shu-Xian Hu, Diwu Juan, Guozhong Wu, Yaxing Wang, Zhifang Chai, Shuao Wang
Summary: This study reveals the intrinsic semiconducting properties of a large mixed-valent uranium cluster, with single-crystal X-ray crystallography and spectroscopic data confirming its n-type semiconductor behavior. The cluster exhibits high detection sensitivity and a considerable charge transport property.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Biochemistry & Molecular Biology
Du Sun, Chunxue Lv, Yilong Hua, Mi Li, Xiaowen Zhang, Qi Fang, Tao Cai, Xiaoyan Wu
Summary: As an emerging technology, microbial fuel cell (MFC) offers a novel approach for treating uranium-containing wastewater (UCW). In this study, investigations were conducted to evaluate the performance of MFCs with different cathode materials. The results showed that each MFC system performed differently in terms of carbon source degradation, uranium removal, and electricity production. Carbon brush MFC showed the best performance in carbon source degradation, nickel foam MFC had the best uranium removal method, and carbon-based cathode MFC achieved the best electricity production. This study confirmed the high potential of abiotic cathode MFC in UCW removal and provided guidance for selecting the best cathode for MFC.
BIOELECTROCHEMISTRY
(2023)
Article
Environmental Sciences
Liting Hao, Yuanyuan He, Chen Shi, Xiaodi Hao
Summary: Wheat straw as a solid carbon source showed high efficiency in removing vanadium (V) from groundwater, with the best biologically reduction of V(V) to V(IV). Additionally, the particle size of wheat straw also impacted the removal efficiency, with smaller fragment sizes (1-3mm) demonstrating significant bio-removal performance on V(V).
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Anja Reckhardt, Stephan L. Seibert, Tobias Holt, Janis Ahrens, Melanie Beck, Gudrun Massmann, Hans-Jurgen Brumsack
Summary: The study revealed the presence of various redox-sensitive metals in freshwater lenses, where their concentrations are influenced by biogeochemical processes. Additionally, the age and redox characteristics of groundwater are linked to metal concentrations. The sources, removal, and transformation processes of metals differ significantly in different redox environments.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
