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Hu Z, Zhou Z, Zhou Y, Zheng L, Guo J, Liu Y, Sun Z, Yang Z, Yu X. Synergy of surface adsorption and intracellular accumulation for removal of uranium with Stenotrophomonas sp: Performance and mechanisms. ENVIRONMENTAL RESEARCH 2023; 220:115093. [PMID: 36574801 DOI: 10.1016/j.envres.2022.115093] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/10/2022] [Accepted: 12/15/2022] [Indexed: 06/17/2023]
Abstract
Uranium is well-known to have serious adverse effects on the ecological environment and human health. Bioremediation stands out among many remediation methods owing to its being economically feasible and environmentally friendly. This study reported a great promising strategy for eliminating uranium by Stenotrophomonas sp. CICC 23833 in the aquatic environment. The bacterium demonstrated excellent uranium adsorption capacity (qmax = 392.9 mg/g) because of the synergistic effect of surface adsorption and intracellular accumulation. Further analysis revealed that hydroxyl, carboxyl, phosphate groups and proteins of microorganisms were essential in uranium adsorption. Intracellular accumulation was closely related to cellular activity, and the efficiency of uranium processing by the permeabilized bacterial cells was significantly improved. In response to uranium stress, the bacterium was found to release multiple ions in conjunction with uranium adsorption, which facilitates the maintenance of bacterial life activities and the conversion of uranyl to precipitates. These above results indicated that Stenotrophomonas sp. Had great potential application value for the remediation of uranium.
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Affiliation(s)
- Zhongqiang Hu
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, Jiangxi, China; School of Water Resources and Environmental Engineering, East China University of Technology, Nanchang 330013, Jiangxi, China
| | - Zhongkui Zhou
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, Jiangxi, China; School of Water Resources and Environmental Engineering, East China University of Technology, Nanchang 330013, Jiangxi, China.
| | - Yaoyu Zhou
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, Jiangxi, China; School of Water Resources and Environmental Engineering, East China University of Technology, Nanchang 330013, Jiangxi, China; College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China.
| | - Lili Zheng
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Jianping Guo
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, Jiangxi, China; School of Water Resources and Environmental Engineering, East China University of Technology, Nanchang 330013, Jiangxi, China
| | - Yong Liu
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, Jiangxi, China; School of Water Resources and Environmental Engineering, East China University of Technology, Nanchang 330013, Jiangxi, China
| | - Zhanxue Sun
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, Jiangxi, China; School of Water Resources and Environmental Engineering, East China University of Technology, Nanchang 330013, Jiangxi, China
| | - Zhihui Yang
- School of Metallurgy and Environment, Central South University, Changsha 410083, Hunan, China
| | - Xiaoxia Yu
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, Jiangxi, China; School of Water Resources and Environmental Engineering, East China University of Technology, Nanchang 330013, Jiangxi, China
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Yu Q, Yuan Y, Feng L, Sun W, Lin K, Zhang J, Zhang Y, Wang H, Wang N, Peng Q. Highly efficient immobilization of environmental uranium contamination with Pseudomonas stutzeri by biosorption, biomineralization, and bioreduction. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127758. [PMID: 34801303 DOI: 10.1016/j.jhazmat.2021.127758] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 10/26/2021] [Accepted: 11/09/2021] [Indexed: 06/13/2023]
Abstract
Uranium is a heavy metal with both chemotoxicity and radiotoxicity. Due to the increasing consumption of uranium, the remediation of uranium contamination and recovery of uranium from non-conventional approach is highly needed. Microorganism exhibits high potential for immobilization of uranium. This study for the first time isolated a marine Pseudomonas stutzeri strain MRU-UE1 with high uranium immobilization capacity of 308.72 mg/g, which is attributed to the synergetic mechanisms of biosorption, biomineralization, and bioreduction. The uranium is found to be immobilized in forms of tetragonal chernikovite (H2(UO2)2(PO4)2·8H2O) by biomineralization and CaU(PO4)2 by bioreduction under aerobic environment, which is rarely observed and would broaden the application of this strain in aerobic condition. The protein, phosphate group, and carboxyl group are found to be essential for the biosorption of uranium. In response to the stress of uranium, the strain produces inorganic phosphate group, which transformed soluble uranyl ion to insoluble uranium-containing precipitates, and poly-β-hydroxybutyrate (PHB), which is observed for the first time during the interaction between microorganism and uranium. In summary, P. stutzeri strain MRU-UE1 would be a promising alternative for environmental uranium contamination remediation and uranium extraction from seawater.
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Affiliation(s)
- Qiuhan Yu
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, PR China
| | - Yihui Yuan
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, PR China.
| | - Lijuan Feng
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, PR China
| | - Wenyan Sun
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, PR China
| | - Ke Lin
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, PR China
| | - Jiacheng Zhang
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, PR China
| | - Yibin Zhang
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province, College of Life Sciences, Hainan Normal University, Haikou 571158, PR China
| | - Hui Wang
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, PR China
| | - Ning Wang
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, PR China.
| | - Qin Peng
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province, College of Life Sciences, Hainan Normal University, Haikou 571158, PR China.
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Shukla SK, Hariharan S, Rao TS. Uranium bioremediation by acid phosphatase activity of Staphylococcus aureus biofilms: Can a foe turn a friend? JOURNAL OF HAZARDOUS MATERIALS 2020; 384:121316. [PMID: 31607578 DOI: 10.1016/j.jhazmat.2019.121316] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 09/13/2019] [Accepted: 09/24/2019] [Indexed: 06/10/2023]
Abstract
In this study, Staphylococcus aureus biofilms, which are considered a foe for being pathogenic, were tested for their uranium bioremediation capacity to find out if they can turn out to be a friend. Acid phosphatase activity, which is speculated to aid in bio-precipitation of U(VI) from uranyl nitrate solution, was assayed in biofilms of seven different S. aureus strains. The presence of acid phosphatase enzyme was detected in the biofilms of all S. aureus strains (in the range of 3.1 ± 0.21 to 26.90 ± 2.32 μi.u./g), and found to be higher when compared to that of their planktonic phenotypes. Among all, S. aureus V329 biofilm showed highest biofilm formation ability along with maximum phosphatase activity (26.9 ± 2.32 μi.u./g of biomass). Addition of phosphate enhanced the U(VI) remediation when treated with uranyl nitrate solution. S. aureus V329 biofilm showed significant U tolerance with only a 3-log reduction when exposed to 10 ppm U(VI) for 1 h. When treated in batch mode, V329 biofilm successfully remediated up to 47% of the 10 ppm U(VI). This new approach using the acid phosphatase from the S. aureus V329 biofilm presents an alternative method for the remediation of uranium contamination.
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Affiliation(s)
- Sudhir K Shukla
- Biofouling & Thermal Ecology Section, Water & Steam Chemistry Division, BARC Facilities, Kalpakkam, Tamil Nadu, 603102, India
| | - S Hariharan
- Department of Biotechnology, Sri Venkateswara College of Engineering, Sriperumbudur, Chennai, 602117, India
| | - T Subba Rao
- Biofouling & Thermal Ecology Section, Water & Steam Chemistry Division, BARC Facilities, Kalpakkam, Tamil Nadu, 603102, India; Homi Bhabha National Institute, Mumbai, 400094, India.
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Yuan Y, Yu Q, Yang S, Wen J, Guo Z, Wang X, Wang N. Ultrafast Recovery of Uranium from Seawater by Bacillus velezensis Strain UUS-1 with Innate Anti-Biofouling Activity. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1900961. [PMID: 31559134 PMCID: PMC6755527 DOI: 10.1002/advs.201900961] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 06/29/2019] [Indexed: 05/05/2023]
Abstract
Highly-efficient recovery of uranium from seawater is of great concern in the growing demand for nuclear energy. Bacteria are thought to be potential alternatives for uranium recovery. Herein, a Bacillus velezensis strain, UUS-1, with highly-efficient uranium immobilization capacity is isolated and is used in the recovery of uranium from seawater. The strain exhibits time-dependent uranium recovery capacity and only immobilizes uranium after growing for 12 h. The carboxyl group together with the amino group inside the bacterial cells, but not previously identified phosphate group, are essential for uranium immobilization. UUS-1 shows broad-spectrum antimicrobial activity by producing diverse antimicrobial metabolites, which endows the strain with innate resistance to the biofouling of marine microorganisms. Based on the dry weight of the initially used bacterial cultures, UUS-1 concentrates uranium by 6.26 × 105 times and reaches the high immobilization capacity of 9.46 ± 0.39 mg U g-1 bacterial cultures in real seawater within 48 h, which is the fastest uranium immobilization capacity observed from real seawater. Overall considering the ultrafast and highly-efficient uranium recovery capacity and the innate anti-biofouling activity, UUS-1 is a promising alternative for uranium recovery from seawater.
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Affiliation(s)
- Yihui Yuan
- State Key Laboratory of Marine Resource Utilization in South China SeaHainan UniversityHaikou570228P. R. China
| | - Qiuhan Yu
- State Key Laboratory of Marine Resource Utilization in South China SeaHainan UniversityHaikou570228P. R. China
| | - Shuo Yang
- State Key Laboratory of Marine Resource Utilization in South China SeaHainan UniversityHaikou570228P. R. China
| | - Jun Wen
- Institute of Nuclear Physics and ChemistryChina Academy of Engineering PhysicsMianyang621900P. R. China
| | - Zhanhu Guo
- Integrated Composites Laboratory (ICL)Department of Chemical and Biomolecular EngineeringUniversity of TennesseeKnoxvilleTN37996USA
- College of Chemical and Environmental EngineeringShandong University of Science and TechnologyQingdao266590P. R. China
| | - Xiaolin Wang
- Institute of Nuclear Physics and ChemistryChina Academy of Engineering PhysicsMianyang621900P. R. China
| | - Ning Wang
- State Key Laboratory of Marine Resource Utilization in South China SeaHainan UniversityHaikou570228P. R. China
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