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Xie G, Feng G, Li Q, Zhang K, Tang C, Chen H, Cai C, Mao P. Efficient uranium sequestration ability and mechanism of live and inactivated strain of Streptomyces sp. HX-1 isolated from uranium wastewater. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 356:124307. [PMID: 38830528 DOI: 10.1016/j.envpol.2024.124307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 05/20/2024] [Accepted: 06/01/2024] [Indexed: 06/05/2024]
Abstract
Prokaryotes are effective biosorbents for the recovery of uranium and other heavy metals. However, the potential mechanism of uranium bioaccumulation by filamentous strain (actinobacteria) remains unclear. This study demonstrates the potential for and mechanism of uranium bioaccumulation by living (L-SS) and inactivated (I-SS) Streptomyces sp. HX-1 isolated from uranium mine waste streams. Uranium accumulation experiments showed that L-SS and I-SS had efficient uranium adsorption potentials, with removal rates of 92.93 and 97.42%, respectively. Kinetic and equilibrium data indicated that the bioaccumulation process was consistent with the pseudo-second-order kinetic, Langmuir, and Sips isotherm models. FTIR indicated that the main functional groups of L-SS and I-SS binding uranium were uranyl, carboxyl, and phosphate groups. Moreover, the results of XRD, XPS, SEM-EDS, and TEM-EDS analyses revealed for the first time that L-SS has biomineralization and bioreduction capacity against uranium. L-SS mineralize U(VI) into NH4UO2PO4 and [Formula: see text] through the metabolic activity of biological enzymes (phosphatases). In summary, Streptomyces sp. HX-1 is a novel and efficient uranium-fixing biosorbent for the treatment of uranium-contaminated wastewater.
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Affiliation(s)
- Gen Xie
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
| | - Guangwen Feng
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China.
| | - Qin Li
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
| | - Keyong Zhang
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
| | - Chao Tang
- Research Center of Ion Beam Biotechnology and Biodiversity, Xi'an Technological University, Xi'an, Shaanxi, 710032, PR China
| | - Henglei Chen
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
| | - Changlong Cai
- Research Center of Ion Beam Biotechnology and Biodiversity, Xi'an Technological University, Xi'an, Shaanxi, 710032, PR China
| | - Peihong Mao
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
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Manawi Y, Hassan A, Atieh MA, Lawler J. Overview of radon gas in groundwater around the world: Health effects and treatment technologies. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 368:122176. [PMID: 39180822 DOI: 10.1016/j.jenvman.2024.122176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2024] [Revised: 07/08/2024] [Accepted: 08/07/2024] [Indexed: 08/27/2024]
Abstract
The natural radioactive decay of uranium in rocks and soils gives rise to the presence of radon in groundwater. The existence of radon in groundwater at activity levels way higher than the reference limits set by US-EPA and WHO was widely covered in literature. The exposure to elevated levels of radon in ground and drinking water have been reported in literature to cause adverse health impacts. The aim of the present paper is to give an overview of radon gas in groundwater followed by the safe limits suggested by international organizations and agencies such as US-EPA and WHO. The paper also discusses the health effects associated with the exposure to radon levels and the estimation of the annual effective dose through ingestion and inhalation. This is followed by the radon levels around the world as well as the corresponding annual effective doses reported in literature. The determination techniques of radon levels in water covered in literature such as liquid scintillation counting, gamma-ray spectrometry and emanometry were also discussed and reviewed in the present work. Next, the paper sheds light on the most frequently used treatment techniques such as aeration, adsorption, filtration as well as biological techniques and evaluates their efficiency in mitigating radon levels in water. The paper also highlights the main precautions and future mitigation plans for radon in groundwater as well as delved onto future research perspectives of radon. It was found out that the type of rock played a key role in determining the radon levels. For instance, granitic rock types were reported to contribute to the elevation in the groundwater radon levels due to their characteristic permeability as a result of the formed fractures as well as their natural incorporation of high levels of uranium. Some of the reported radon levels in groundwater in literature were way higher than the guidelines set by the World Health Organization (WHO) for drinking water and US-EPA alternative higher maximum contaminant level. This review paper could be of importance to researchers working on the evaluation as well as the treatment of radon gas in water as it will provide a critical and state of the art review on radon gas in groundwater.
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Affiliation(s)
- Yehia Manawi
- Qatar Environment and Energy Research Institute, Hamad Bin Khalifa University, Qatar Foundation, Doha P.O. Box 34110, Qatar.
| | - Arzoo Hassan
- Department of Chemical Engineering, College of Engineering, Qatar University, Doha, P.O. Box: 2713, Qatar
| | - Muataz Ali Atieh
- Research Institute of Sciences & Engineering, University of Sharjah, Sharjah, 27272, United Arab Emirates; Chemical and Water Desalination Engineering Program, College of Engineering, University of Sharjah, Sharjah, 27272, United Arab Emirates
| | - Jenny Lawler
- Qatar Environment and Energy Research Institute, Hamad Bin Khalifa University, Qatar Foundation, Doha P.O. Box 34110, Qatar.
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MacIntosh A, Dafforn K, Chariton A, Koppel D, Cresswell T, Gissi F. Response of Microbial Communities to Naturally Occurring Radioactive Material-Contaminated Sediments: A Microcosm-Based Study. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2024; 43:1648-1661. [PMID: 38819030 DOI: 10.1002/etc.5887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 03/31/2024] [Accepted: 04/10/2024] [Indexed: 06/01/2024]
Abstract
There is a growing need to understand the potential ecological impacts of contaminants in offshore oil and gas infrastructure, especially if that infrastructure is to be left in situ as a decommissioning option. Naturally occurring radioactive material (NORM) is one type of contaminant found in solid deposits on internal surfaces of infrastructure that poses potential ecological harm if released into the marine environment. Microbes are important components of marine sediment ecosystems because they provide ecosystem services, yet the impacts of NORM contamination to these communities are not well understood. The present study aimed to investigate the response of benthic microbial communities to NORM-contaminated scale, collected from an offshore oil and gas system, via controlled laboratory microcosm studies. Changes to microbial communities in natural sediment and sediments spiked with NORM at radium-226 activity concentrations ranging from 9.5 to 59.8 Bq/kg (in partial equilibria with progeny) over 7 and 28 days were investigated using high-throughput sequencing of environmental DNA extracted from experimental sediments. There were no significant differences in microbial community composition between control and scale-spiked sediments over 7 and 28 days. However, we observed a greater presence of Firmicutes in the scale-mixed treatment and Chloroflexi in the scale-surface treatments after 28 days. This could suggest selection for species with contaminant tolerance or potential resilience to radiation and metal toxicity. Further research is needed to explore microbial tolerance mechanisms and their potential as indicators of effects of radionuclide-contaminated sediments. The present study demonstrated that microcosm studies can provide valuable insights about the potential impacts of contamination from oil and gas infrastructure to sediment microbial communities. Environ Toxicol Chem 2024;43:1648-1661. © 2024 The Authors. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.
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Affiliation(s)
- Amy MacIntosh
- Australian Nuclear Science and Technology Organisation, Lucas Heights, New South Wales, Australia
- School of Natural Sciences, Wallumattagal Campus, Macquarie University, Sydney, New South Wales, Australia
| | - Katherine Dafforn
- School of Natural Sciences, Wallumattagal Campus, Macquarie University, Sydney, New South Wales, Australia
| | - Anthony Chariton
- School of Natural Sciences, Wallumattagal Campus, Macquarie University, Sydney, New South Wales, Australia
| | - Darren Koppel
- Australian Institute of Marine Science, Indian Ocean Marine Research Centre, Perth, Western Australia, Australia
| | - Tom Cresswell
- Australian Nuclear Science and Technology Organisation, Lucas Heights, New South Wales, Australia
| | - Francesca Gissi
- Australian Nuclear Science and Technology Organisation, Lucas Heights, New South Wales, Australia
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Khan A, Liu G, Zhang G, Li X. Radiation-resistant bacteria in desiccated soil and their potentiality in applied sciences. Front Microbiol 2024; 15:1348758. [PMID: 38894973 PMCID: PMC11184166 DOI: 10.3389/fmicb.2024.1348758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Accepted: 05/17/2024] [Indexed: 06/21/2024] Open
Abstract
A rich diversity of radiation-resistant (Rr) and desiccation-resistant (Dr) bacteria has been found in arid habitats of the world. Evidence from scientific research has linked their origin to reactive oxygen species (ROS) intermediates. Rr and Dr. bacteria of arid regions have the potential to regulate imbalance radicals and evade a higher dose of radiation and oxidation than bacterial species of non-arid regions. Photochemical-activated ROS in Rr bacteria is run through photo-induction of electron transfer. A hypothetical model of the biogeochemical cycle based on solar radiation and desiccation. These selective stresses generate oxidative radicals for a short span with strong reactivity and toxic effects. Desert-inhibiting Rr bacteria efficiently evade ROS toxicity with an evolved antioxidant system and other defensive pathways. The imbalanced radicals in physiological disorders, cancer, and lung diseases could be neutralized by a self-sustaining evolved Rr bacteria antioxidant system. The direct link of evolved antioxidant system with intermediate ROS and indirect influence of radiation and desiccation provide useful insight into richness, ecological diversity, and origin of Rr bacteria capabilities. The distinguishing features of Rr bacteria in deserts present a fertile research area with promising applications in the pharmaceutical industry, genetic engineering, biological therapy, biological transformation, bioremediation, industrial biotechnology, and astrobiology.
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Affiliation(s)
- Asaf Khan
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
- Key Laboratory of Extreme Environmental Microbial Resources and Engineering, Lanzhou, China
| | - Guangxiu Liu
- Key Laboratory of Extreme Environmental Microbial Resources and Engineering, Lanzhou, China
- Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China
| | - Gaosen Zhang
- Key Laboratory of Extreme Environmental Microbial Resources and Engineering, Lanzhou, China
- Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China
| | - Xiangkai Li
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
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Belykh E, Maystrenko T, Velegzhaninov I, Tavleeva M, Rasova E, Rybak A. Taxonomic Diversity and Functional Traits of Soil Bacterial Communities under Radioactive Contamination: A Review. Microorganisms 2024; 12:733. [PMID: 38674676 PMCID: PMC11051952 DOI: 10.3390/microorganisms12040733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 03/28/2024] [Accepted: 04/01/2024] [Indexed: 04/28/2024] Open
Abstract
Studies investigating the taxonomic diversity and structure of soil bacteria in areas with enhanced radioactive backgrounds have been ongoing for three decades. An analysis of data published from 1996 to 2024 reveals changes in the taxonomic structure of radioactively contaminated soils compared to the reference, showing that these changes are not exclusively dependent on contamination rates or pollutant compositions. High levels of radioactive exposure from external irradiation and a high radionuclide content lead to a decrease in the alpha diversity of soil bacterial communities, both in laboratory settings and environmental conditions. The effects of low or moderate exposure are not consistently pronounced or unidirectional. Functional differences among taxonomic groups that dominate in contaminated soil indicate a variety of adaptation strategies. Bacteria identified as multiple-stress tolerant; exhibiting tolerance to metals and antibiotics; producing antioxidant enzymes, low-molecular antioxidants, and radioprotectors; participating in redox reactions; and possessing thermophilic characteristics play a significant role. Changes in the taxonomic and functional structure, resulting from increased soil radionuclide content, are influenced by the combined effects of ionizing radiation, the chemical toxicity of radionuclides and co-contaminants, as well as the physical and chemical properties of the soil and the initial bacterial community composition. Currently, the quantification of the differential contributions of these factors based on the existing published studies presents a challenge.
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Affiliation(s)
- Elena Belykh
- Institute of Biology of Komi Scientific Centre, Ural Branch of Russian Academy of Sciences, 28 Kommunisticheskaya St., Syktyvkar 167982, Russia (I.V.); (E.R.)
| | - Tatiana Maystrenko
- Institute of Biology of Komi Scientific Centre, Ural Branch of Russian Academy of Sciences, 28 Kommunisticheskaya St., Syktyvkar 167982, Russia (I.V.); (E.R.)
| | - Ilya Velegzhaninov
- Institute of Biology of Komi Scientific Centre, Ural Branch of Russian Academy of Sciences, 28 Kommunisticheskaya St., Syktyvkar 167982, Russia (I.V.); (E.R.)
| | - Marina Tavleeva
- Institute of Biology of Komi Scientific Centre, Ural Branch of Russian Academy of Sciences, 28 Kommunisticheskaya St., Syktyvkar 167982, Russia (I.V.); (E.R.)
- Department of Biology, Institute of Natural Sciences, Pitirim Sorokin Syktyvkar State University, 55 Oktyabrsky Prospekt, Syktyvkar 167001, Russia
| | - Elena Rasova
- Institute of Biology of Komi Scientific Centre, Ural Branch of Russian Academy of Sciences, 28 Kommunisticheskaya St., Syktyvkar 167982, Russia (I.V.); (E.R.)
| | - Anna Rybak
- Institute of Biology of Komi Scientific Centre, Ural Branch of Russian Academy of Sciences, 28 Kommunisticheskaya St., Syktyvkar 167982, Russia (I.V.); (E.R.)
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Pradhoshini KP, Santhanabharathi B, Priyadharshini M, Ahmed MS, Murugan K, Sivaperumal P, Alam L, Duong VH, Musthafa MS. Microbial consortium and impact of industrial mining on the Natural High Background Radiation Area (NHBRA), India - Characteristic role of primordial radionuclides in influencing the community structure and extremophiles pattern. ENVIRONMENTAL RESEARCH 2024; 244:118000. [PMID: 38128601 DOI: 10.1016/j.envres.2023.118000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 11/26/2023] [Accepted: 12/19/2023] [Indexed: 12/23/2023]
Abstract
The present investigation is the first of its kind which aims to study the characteristics of microbial consortium inhabiting one of the natural high background radiation areas of the world, Chavara Coast in Kerala, India. The composition of the microbial community and their structural changes were evaluated under the natural circumstances with exorbitant presence of radionuclides in the sediments and after the radionuclide's recession due to mining effects. For this purpose, the concentration of radionuclides, heavy metals, net radioactivity estimation via gross alpha and beta emitters and other physiochemical characteristics were assessed in the sediments throughout the estuarine stretch. According to the results, the radionuclides had a significant effect in shaping the community structure and composition, as confirmed by the bacterial heterogeneity achieved between the samples. The results indicate that high radioactivity in the background environment reduced the abundance and growth of normal microbial fauna and favoured only the growth of certain extremophiles belonging to families of Piscirickettsiacea, Rhodobacteriacea and Thermodesulfovibrionaceae, which were able to tolerate and adapt towards the ionizing radiation present in the environment. In contrast, communities from Comamondacea, Sphingomonadacea, Moraxellacea and Erythrobacteracea were present in the sediments collected from industrial outlet, reinforcing the potent role of radionuclides in governing the community pattern of microbes present in the natural environment. The study confirms the presence of these novel and unidentified bacterial communities and further opens the possibility of utilizing their usefulness in future prospects.
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Affiliation(s)
- Kumara Perumal Pradhoshini
- Unit of Research in Radiation Biology & Environmental Radioactivity (URRBER), P.G & Research Department of Zoology, The New College (Autonomous), Affiliated to University of Madras, Chennai, Tamil Nadu, 600 014, India; Institute for Environment and Development (LESTARI), Research Centre for Sustainability Science and Governance (SGK), Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor, Malaysia
| | - Bharathi Santhanabharathi
- Unit of Research in Radiation Biology & Environmental Radioactivity (URRBER), P.G & Research Department of Zoology, The New College (Autonomous), Affiliated to University of Madras, Chennai, Tamil Nadu, 600 014, India
| | - Marckasagayam Priyadharshini
- Unit of Research in Radiation Biology & Environmental Radioactivity (URRBER), P.G & Research Department of Zoology, The New College (Autonomous), Affiliated to University of Madras, Chennai, Tamil Nadu, 600 014, India
| | - Munawar Suhail Ahmed
- Unit of Research in Radiation Biology & Environmental Radioactivity (URRBER), P.G & Research Department of Zoology, The New College (Autonomous), Affiliated to University of Madras, Chennai, Tamil Nadu, 600 014, India
| | - Karuvelan Murugan
- Department of Microbiology, Vels Institute of Science, Technology and Advanced Sciences (VISTAS), Pallavaram, Chennai, Tamilnadu, 600117, India
| | - Pitchiah Sivaperumal
- Marine Biomedical Research Lab & Environmental Toxicology Unit, Cellular and Molecular Research Centre, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamilnadu, 600077, India
| | - Lubna Alam
- Fisheries Economics Research Unit, Institute for the Oceans and Fisheries, The University of British Columbia, Vancouver, Canada
| | - Van-Hao Duong
- VNU School of Interdisciplinary Studies, Vietnam National University, Hanoi, Viet Nam
| | - Mohamed Saiyad Musthafa
- Unit of Research in Radiation Biology & Environmental Radioactivity (URRBER), P.G & Research Department of Zoology, The New College (Autonomous), Affiliated to University of Madras, Chennai, Tamil Nadu, 600 014, India; Institute for Environment and Development (LESTARI), Research Centre for Sustainability Science and Governance (SGK), Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor, Malaysia.
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Feng G, Mao Y, Xie G, Chen H, Wang J, Mao P, Lv J. Bioremediation of uranium (Ⅵ) using a native strain Halomonas campaniensis ZFSY-04 isolated from uranium mining and milling effluent: Potential and mechanism. CHEMOSPHERE 2024; 346:140646. [PMID: 37944766 DOI: 10.1016/j.chemosphere.2023.140646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 09/30/2023] [Accepted: 11/06/2023] [Indexed: 11/12/2023]
Abstract
A significant surge in the exploitation of uranium resources has resulted in considerable amounts of radioactive effluents. Thus, efficient and eco-friendly uranium removal strategies need to be explored to ensure ecological safety and resource recovery. In this study, we investigated the resistance of Halomonas campaniensis strain ZFSY-04, isolated from an evaporation pool at a uranium mine site, and its potential mechanism of uranium (Ⅵ) removal. The results showed that the strain exhibited unique uranium tolerance and its growth was not significantly inhibited under a uranium concentration of 700 mg/L. It had a maximum loading capacity of 865.40 mg/g (dry weight), achieved following incubation under uranium concentration of 100 mg/L, pH 6.0, and temperature 30 °C, for 2 h, indicating that the removal of uranium by the strain was efficient and rapid. Combined with kinetic, isothermal, thermodynamic, and microspectral analyses, the mechanism of uranium loading by strain ZFSY-04 was metabolism-dependent and diverse, including, physical and chemical adsorption on the cell surface, extracellular biomineralisation, intracellular bioaccumulation, and biomineralisation. Our results highlight the unique properties of indigenous strains, including high resistance, high efficiency, rapid uranium removal, and various uranium removal strategies, which make it suitable as a new tool for in situ bioremediation and uranium-contaminated environmental resource recovery.
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Affiliation(s)
- Guangwen Feng
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
| | - Yu Mao
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
| | - Gen Xie
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
| | - Henglei Chen
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
| | - Jun Wang
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
| | - Peihong Mao
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
| | - Jie Lv
- College of Life Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China.
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Ershov AP, Babich TL, Grouzdev DS, Sokolova DS, Semenova EM, Avtukh AN, Poltaraus AB, Ianutsevich EA, Nazina TN. Genome Analysis and Potential Ecological Functions of Members of the Genus Ensifer from Subsurface Environments and Description of Ensifer oleiphilus sp. nov. Microorganisms 2023; 11:2314. [PMID: 37764159 PMCID: PMC10538136 DOI: 10.3390/microorganisms11092314] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 09/06/2023] [Accepted: 09/09/2023] [Indexed: 09/29/2023] Open
Abstract
The current work deals with genomic analysis, possible ecological functions, and biotechnological potential of two bacterial strains, HO-A22T and SHC 2-14, isolated from unique subsurface environments, the Cheremukhovskoe oil field (Tatarstan, Russia) and nitrate- and radionuclide-contaminated groundwater (Tomsk region, Russia), respectively. New isolates were characterized using polyphasic taxonomy approaches and genomic analysis. The genomes of the strains HO-A22T and SHC 2-14 contain the genes involved in nitrate reduction, hydrocarbon degradation, extracellular polysaccharide synthesis, and heavy metal detoxification, confirming the potential for their application in various environmental biotechnologies. Genomic data were confirmed by cultivation studies. Both strains were found to be neutrophilic, chemoorganotrophic, facultatively anaerobic bacteria, growing at 15-33 °C and 0-1.6% NaCl (w/v). The 16S rRNA gene sequences of the strains were similar to those of the type strains of the genus Ensifer (99.0-100.0%). Nevertheless, genomic characteristics of strain HO-A22T were below the thresholds for species delineation: the calculated average nucleotide identity (ANI) values were 83.7-92.4% (<95%), and digital DNA-DNA hybridization (dDDH) values were within the range of 25.4-45.9% (<70%), which supported our conclusion that HO-A22T (=VKM B-3646T = KCTC 92427T) represented a novel species of the genus Ensifer, with the proposed name Ensifer oleiphilus sp. nov. Strain SHC 2-14 was assigned to the species 'Ensifer canadensis', which has not been validly published. This study expanded the knowledge about the phenotypic diversity among members of the genus Ensifer and its potential for the biotechnologies of oil recovery and radionuclide pollution treatment.
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Affiliation(s)
- Alexey P. Ershov
- Winogradsky Institute of Microbiology, Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia; (A.P.E.); (T.L.B.); (D.S.S.); (E.M.S.); (E.A.I.)
| | - Tamara L. Babich
- Winogradsky Institute of Microbiology, Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia; (A.P.E.); (T.L.B.); (D.S.S.); (E.M.S.); (E.A.I.)
| | | | - Diyana S. Sokolova
- Winogradsky Institute of Microbiology, Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia; (A.P.E.); (T.L.B.); (D.S.S.); (E.M.S.); (E.A.I.)
| | - Ekaterina M. Semenova
- Winogradsky Institute of Microbiology, Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia; (A.P.E.); (T.L.B.); (D.S.S.); (E.M.S.); (E.A.I.)
| | - Alexander N. Avtukh
- Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, 142290 Pushchino, Russia;
| | - Andrey B. Poltaraus
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia;
| | - Elena A. Ianutsevich
- Winogradsky Institute of Microbiology, Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia; (A.P.E.); (T.L.B.); (D.S.S.); (E.M.S.); (E.A.I.)
| | - Tamara N. Nazina
- Winogradsky Institute of Microbiology, Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia; (A.P.E.); (T.L.B.); (D.S.S.); (E.M.S.); (E.A.I.)
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Maqsood Q, Sumrin A, Waseem R, Hussain M, Imtiaz M, Hussain N. Bioengineered microbial strains for detoxification of toxic environmental pollutants. ENVIRONMENTAL RESEARCH 2023; 227:115665. [PMID: 36907340 DOI: 10.1016/j.envres.2023.115665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 03/05/2023] [Accepted: 03/08/2023] [Indexed: 05/08/2023]
Abstract
Industrialization and other anthropogenic human activities pose significant environmental risks. As a result of the hazardous pollution, numerous living organisms may suffer from undesirable diseases in their separate habitats. Bioremediation, which removes hazardous compounds from the environment using microbes or their biologically active metabolites, is one of the most successful remediation approaches. According to the United Nations Environment Program (UNEP), deteriorating soil health negatively impacts food security and human health over time. Soil health restoration is critical right now. Microbes are widely known for their importance in cleaning up toxins present in the soil, such as heavy metals, pesticides, and hydrocarbons. However, the capacity of local bacteria to digest these pollutants is limited, and the process takes an extended time. Genetically modified organisms (GMOs), whose altered metabolic pathways promote the over-secretion of a variety of proteins favorable to the bioremediation process, can speed up the breakdown process. The need for remediation procedures, degrees of soil contamination, site circumstances, broad adoptions, and numerous possibilities occurring at various cleaning stages are all studied in detail. Massive efforts to restore contaminated soils have also resulted in severe issues. This review focuses on the enzymatic removal of hazardous pollutants from the environment, such as pesticides, heavy metals, dyes, and plastics. There are also in-depth assessments of present discoveries and future plans for efficient enzymatic degradation of hazardous pollutants.
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Affiliation(s)
- Quratulain Maqsood
- Center for Applied Molecular Biology, University of the Punjab, Lahore, Pakistan
| | - Aleena Sumrin
- Center for Applied Molecular Biology, University of the Punjab, Lahore, Pakistan
| | - Rafia Waseem
- Center for Applied Molecular Biology, University of the Punjab, Lahore, Pakistan
| | - Maria Hussain
- Center for Applied Molecular Biology, University of the Punjab, Lahore, Pakistan
| | - Mehwish Imtiaz
- Center for Applied Molecular Biology, University of the Punjab, Lahore, Pakistan
| | - Nazim Hussain
- Center for Applied Molecular Biology, University of the Punjab, Lahore, Pakistan.
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10
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Feng G, Yong J, Liu Q, Chen H, Hu Y, Mao P. Remedial effect and operating status of a decommissioned uranium mill tailings (UMT) repository: A micro-ecological perspective based on bacterial community. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 340:117993. [PMID: 37094385 DOI: 10.1016/j.jenvman.2023.117993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 04/06/2023] [Accepted: 04/18/2023] [Indexed: 05/03/2023]
Abstract
From a radioecological perspective, increasing attention has been paid to the long-term stabilisation of decommissioned uranium mill tailings (UMT) repositories. However, little is known about the evaluation of decommissioning and remedial effects of UMT repositories from a microecological perspective based on bacterial communities. Here, we analysed the distribution and structure of soil community assemblies along different vertical soil profiles in a decommissioned UMT repository and explored the impact of soil properties, including physicochemical parameters, metal(loid)s, and radionuclides, on the bacterial assemblage. We found that the α diversity of the bacterial community was unaffected by variations in different soil profiles and taxa were classified at the phylum level with small significant differences. In contrast, the bacterial community structure in and around the UMT repository showed significant differences; however, this difference was significantly affected by soil metal(loid)s and physicochemical properties rather than soil radionuclides. In addition, seven bacterial genera with significant differences between the inner and surrounding regions of the repository could be used as potential indicators to further investigate the remedial effects on soil environmental quality. These findings provide novel insights into the construction of an assessment system and in situ biomonitoring of UMT repositories from a microecological perspective based on bacterial communities.
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Affiliation(s)
- Guangwen Feng
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China.
| | - Jinlong Yong
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
| | - Qian Liu
- School of Statistics and Data Science, Xinjiang University of Finance & Economics, Urumqi, Xinjiang, 830012, PR China
| | - Henglei Chen
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
| | - Youhua Hu
- Radiation Environment Supervision Station of Xinjiang, Urumqi, Xinjiang, 830000, PR China
| | - Peihong Mao
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830017, PR China
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11
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Guo J, Wang Z, Zhang G, Liu S, Dong L, Gu P, Hou L. Rapid and effective removal of strontium ions from aqueous solutions by a novel layered metal sulfide NaTS-2. J Radioanal Nucl Chem 2023. [DOI: 10.1007/s10967-023-08850-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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12
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Ruiz-Fresneda MA, Martinez-Moreno MF, Povedano-Priego C, Morales-Hidalgo M, Jroundi F, Merroun ML. Impact of microbial processes on the safety of deep geological repositories for radioactive waste. Front Microbiol 2023; 14:1134078. [PMID: 37007474 PMCID: PMC10062484 DOI: 10.3389/fmicb.2023.1134078] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Accepted: 02/27/2023] [Indexed: 03/18/2023] Open
Abstract
To date, the increasing production of radioactive waste due to the extensive use of nuclear power is becoming a global environmental concern for society. For this reason, many countries have been considering the use of deep geological repositories (DGRs) for the safe disposal of this waste in the near future. Several DGR designs have been chemically, physically, and geologically well characterized. However, less is known about the influence of microbial processes for the safety of these disposal systems. The existence of microorganisms in many materials selected for their use as barriers for DGRs, including clay, cementitious materials, or crystalline rocks (e.g., granites), has previously been reported. The role that microbial processes could play in the metal corrosion of canisters containing radioactive waste, the transformation of clay minerals, gas production, and the mobility of the radionuclides characteristic of such residues is well known. Among the radionuclides present in radioactive waste, selenium (Se), uranium (U), and curium (Cm) are of great interest. Se and Cm are common components of the spent nuclear fuel residues, mainly as 79Se isotope (half-life 3.27 × 105 years), 247Cm (half-life: 1.6 × 107 years) and 248Cm (half-life: 3.5 × 106 years) isotopes, respectively. This review presents an up-to-date overview about how microbes occurring in the surroundings of a DGR may influence their safety, with a particular focus on the radionuclide-microbial interactions. Consequently, this paper will provide an exhaustive understanding about the influence of microorganisms in the safety of planned radioactive waste repositories, which in turn might improve their implementation and efficiency.
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13
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Razia S, Hadibarata T, Lau SY. Acidophilic microorganisms in remediation of contaminants present in extremely acidic conditions. Bioprocess Biosyst Eng 2023; 46:341-358. [PMID: 36602611 DOI: 10.1007/s00449-022-02844-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 12/21/2022] [Indexed: 01/06/2023]
Abstract
Acidophiles are a group of microorganisms that thrive in acidic environments where pH level is far below the neutral value 7.0. They belong to a larger family called extremophiles, which is a group that thrives in various extreme environmental conditions which are normally inhospitable to other organisms. Several human activities such as mining, construction and other industrial processes release highly acidic effluents and wastes into the environment. Those acidic wastes and wastewaters contain different types of pollutants such as heavy metals, radioactive, and organic, whose have adverse effects on human being as well as on other living organisms. To protect the whole ecosystem, those pollutants containing effluents or wastes must be clean properly before releasing into environment. Physicochemical cleanup processes under extremely acidic conditions are not always successful due to high cost and release of toxic byproducts. While in case of biological methods, except acidophiles, no other microorganisms cannot survive in highly acidic conditions. Therefore, acidophiles can be a good choice for remediation of different types of contaminants present in acidic conditions. In this review article, various roles of acidophilic microorganisms responsible for removing heavy metals and radioactive pollutants from acidic environments were discussed. Bioremediation of various acidic organic pollutants by using acidophiles was also studied. Overall, this review could be helpful to extend our knowledge as well as to do further relevant novel studies in the field of acidic pollutants remediation by applying acidophilic microorganisms.
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Affiliation(s)
- Sultana Razia
- Environmental Engineering Program, Faculty of Engineering and Science, Curtin University, Miri, Malaysia
| | - Tony Hadibarata
- Environmental Engineering Program, Faculty of Engineering and Science, Curtin University, Miri, Malaysia.
| | - Sie Yon Lau
- Department of Chemical and Energy Engineering, Faculty of Engineering and Science, Curtin University, Miri, Malaysia
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14
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Ma H, Shen M, Tong Y, Wang X. Radioactive Wastewater Treatment Technologies: A Review. Molecules 2023; 28:molecules28041935. [PMID: 36838922 PMCID: PMC9965242 DOI: 10.3390/molecules28041935] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 01/21/2023] [Accepted: 01/28/2023] [Indexed: 02/22/2023] Open
Abstract
With the wide application of nuclear energy, the problem of radioactive pollution has attracted worldwide attention, and the research on the treatment of radioactive wastewater is imminent. How to treat radioactive wastewater deeply and efficiently has become the most critical issue in the development of nuclear energy technology. The radioactive wastewater produced after using nuclear technology has the characteristics of many kinds, high concentration, and large quantity. Therefore, it is of great significance to study the treatment technology of radioactive wastewater in reprocessing plants. The process flow and waste liquid types of the post-treatment plant are reviewed. The commonly used evaporation concentration, adsorption, precipitation, ion exchange, biotechnology, membrane separation, and photocatalysis are summarized. The basic principles and technological characteristics of them are introduced. The advantages and disadvantages of different single and combined processes are compared, and the development trend of future processing technology is prospected.
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Affiliation(s)
- Hailing Ma
- Hoffmann Institute of Advanced Materials, Shenzhen Polytechnic, 7098 Liuxian Boulevard, Shenzhen 518055, China
- Department of Materials Science and Engineering, University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield S1 3JD, UK
| | - Minghai Shen
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Yao Tong
- Hoffmann Institute of Advanced Materials, Shenzhen Polytechnic, 7098 Liuxian Boulevard, Shenzhen 518055, China
- Correspondence: (Y.T.); (X.W.)
| | - Xiao Wang
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
- Correspondence: (Y.T.); (X.W.)
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15
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Feng G, Yong J, Liu Q, Chen H, Mao P. Response of soil microbial communities to natural radionuclides along specific-activity gradients. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 246:114156. [PMID: 36209527 DOI: 10.1016/j.ecoenv.2022.114156] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 09/11/2022] [Accepted: 10/04/2022] [Indexed: 06/16/2023]
Abstract
Understanding the response of soil microbial community to abnormal natural radionuclides is important to maintain soil ecological function, but the underlying mechanism of tolerance and survival of microbes is poorly studied. The effects of natural radionuclides on the topsoil microbial communities in anomalous natural radiation area were investigated in this work, and it was found that microbial community composition was significantly influenced by the specific-activities of natural radionuclides. The results revealed that relative abundances of 10 major microbial phyla and genera displayed different patterns along specific-activity gradients, including decreasing, increasing, hump-shaped, U-shaped, and similar sinusoidal or cosine wave trends, which indicated that the natural radionuclides were the predominant driver for change of microbial community structure. At the phylum and genus level, microbial communities were divided into two special groups according to the tolerance to natural radionuclides, such as 238U and 232Th, including tolerant and sensitive groups. Taken together, our findings suggest that the high specific-activities of natural radionuclides can obviously drive changes in microbial communities, providing a possibility for future studies on the microbial tolerance genes and bioremediation strains.
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Affiliation(s)
- Guangwen Feng
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang 830017, PR China
| | - Jinlong Yong
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang 830017, PR China
| | - Qian Liu
- School of Statistics and Data Science, Xinjiang University of Finance & Economics, Urumqi, Xinjiang 830012, PR China.
| | - Henglei Chen
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang 830017, PR China
| | - Peihong Mao
- Research Center of Radiation Ecology and Ion Beam Biotechnology, College of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang 830017, PR China
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16
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Characterization of Microbial Communities and Naturally Occurring Radionuclides in Soilless Growth Media Amended with Different Concentrations of Biochar. Appl Microbiol 2022. [DOI: 10.3390/applmicrobiol2030051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Biochar, derived from the pyrolysis of plant materials has the potential to enhance plant growth in soilless media. Howevetar, little is known about the impact of biochar amendments to soilless growth media, microbial community composition, and fate of chemical constituents in the media. In this study, different concentrations of biochar were added to soilless media and microbial composition, and chemical constituents were analyzed using metagenomics and gamma spectroscopy techniques, respectively. Across treatments, carboxyl-C, phenolic-C, and aromatic-C were the main carbon sources that influenced microbial community composition. Flavobacterium (39.7%), was the predominantly bacteria genus, followed by Acidibacter (12.2%), Terrimonas (10.1%), Cytophaga (7.5%), Ferruginibacter (6.0%), Lacunisphaera (5.9%), Cellvibrio (5.8%), Opitutus (4.8%), Mucilaginibacter (4.0%) and Bryobacter (4.0%). Negative relationships were found between Cytophaga and 226Ra (r = −0.84, p = 0.0047), 40K (r = −0.82, p = 0.0069) and 137Cs (r = −0.93, p = 0.0002). Similarly, Mucilaginibacter was negatively correlated with 226Ra (r = −0.83, p = 0.0054) and 137Cs (r = −0.87, p = 0.0021). Overall, the data suggest that high % biochar amended samples have high radioactivity concentration levels. Some microorganisms have less presence in high radioactivity concentration levels.
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17
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Preparation of SiO2-KMCHCF composites and its adsorption characteristics for Cs+ and Sb(V) ions. J Radioanal Nucl Chem 2022. [DOI: 10.1007/s10967-022-08483-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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18
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Nayak T, Basak S, Deb A, Dhal PK. A systematic review on groundwater radon distribution with human health consequences and probable mitigation strategy. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2022; 247:106852. [PMID: 35305305 DOI: 10.1016/j.jenvrad.2022.106852] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 02/28/2022] [Accepted: 02/28/2022] [Indexed: 06/14/2023]
Abstract
Groundwater radon contamination is a serious global concern for its eco-toxicological effects. The major health hazard occurs due to toxic indoor air inhalation and consumption of contaminated drinking water supplied from different distribution systems, especially groundwater. There are fragmented reports on the measurement of radon contamination and their health consequences with physical radon removal strategies as well as characterization of inhabitant microbial communities. As it concerned with human health, collective information is much essential on their groundwater distribution, their physicochemical properties and possible mitigation strategies, not done so far. In such prospect, this review summarizes the physicochemical properties of radon, their sources, global as well as Indian groundwater radon contamination scenario, health effects and inhabitant microbes along with their survival strategies. It also summarizes the physical radon removal techniques and especially emphasizes the microbes based bioremediation process as well as a combination of both as a future effective radon remediation process.
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Affiliation(s)
- Tilak Nayak
- Department of Life Science and Biotechnology, Jadavpur University, Kolkata, 700032, India
| | - Sohom Basak
- Department of Biotechnology, Bengal Institute of Technology, Kolkata, 700091, India
| | - Argha Deb
- School of Studies in Environmental Radiation and Archaeological Sciences & Department of Physics, Jadavpur University, Kolkata, 700032, India
| | - Paltu Kumar Dhal
- Department of Life Science and Biotechnology, Jadavpur University, Kolkata, 700032, India.
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19
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Kochhar N, I․K K, Shrivastava S, Ghosh A, Rawat VS, Sodhi KK, Kumar M. Perspectives on the microorganism of extreme environments and their applications. CURRENT RESEARCH IN MICROBIAL SCIENCES 2022; 3:100134. [PMID: 35909612 PMCID: PMC9325743 DOI: 10.1016/j.crmicr.2022.100134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 03/21/2022] [Accepted: 04/11/2022] [Indexed: 11/17/2022] Open
Abstract
Extremophiles are organisms that can survive and thrive in conditions termed as "extreme" by human beings. Conventional methods cannot be applied under extreme conditions like temperature and pH fluctuations, high salinity, etc. for a variety of reasons. Extremophiles can function and are adapted to thrive in these environments and are sustainable, cheaper, and efficient, therefore, they serve as better alternatives to the traditional methods. They adapt to these environments with biochemical and physiological changes and produce products like extremolytes, extremozymes, biosurfactants, etc., which are found to be useful in a wide range of industries like sustainable agriculture, food, cosmetics, and pharmaceuticals. These products also play a crucial role in bioremediation, production of biofuels, biorefinery, and astrobiology. This review paper comprehensively lists out the current applications of extremophiles and their products in various industries and explores the prospects of the same. They help us understand the underlying basis of biological mechanisms exploring the boundaries of life and thus help us understand the origin and evolution of life on Earth. This helps us in the research for extra-terrestrial life and space exploration. The structure and biochemical properties of extremophiles along with any possible long-term effects of their applications need to be investigated further.
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Affiliation(s)
- Nikita Kochhar
- Department of Zoology, Hindu College, University of Delhi, Delhi-110007, India
| | - Kavya I․K
- Department of Zoology, Hindu College, University of Delhi, Delhi-110007, India
| | | | - Anshika Ghosh
- Department of Zoology, Hindu College, University of Delhi, Delhi-110007, India
| | | | - Kushneet Kaur Sodhi
- Department of Zoology, Hansraj College, University of Delhi, Delhi-110007, India
- Department of Zoology, University of Delhi, Delhi-110007, India
| | - Mohit Kumar
- Department of Zoology, Hindu College, University of Delhi, Delhi-110007, India
- Department of Zoology, University of Delhi, Delhi-110007, India
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20
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Patel D, Mamtora D, Kamath A, Shukla A. Rogue one: A plastic story. MARINE POLLUTION BULLETIN 2022; 177:113509. [PMID: 35290835 DOI: 10.1016/j.marpolbul.2022.113509] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 02/22/2022] [Accepted: 02/25/2022] [Indexed: 06/14/2023]
Abstract
Plastic comprises of variety of polymers and has many applications, but the waste generated by plastic pose threat to environment and marine life. Plastic can be classified into two types: thermoplastics and thermosetting and are divided into 7 different categories: (Polyethylene Terephthalate [PETE], High-Density Polyethylene [HDPE], Polyvinyl Chloride [PVC], Low-Density Polyethylene [LDPE], Polypropylene [PP], Polystyrene or Styrofoam [PS] & Polycarbonate or ABS [others]). To curb the deleterious effects of plastic waste various methods have been devised and utilized that include chemical, physical and biological treatments. One of the aspects primarily focused by the researchers is the phenomenon of biodegradation and there are many microorganisms (bacteria) that have the ability to carry out this particular process. These bacteria assist biodegradation by production of several enzymes like PETases and MHETases. There are few microorganisms that have been listed which cannot be applied for industrial use due to its low biodegradation capacity. To overcome this problem, PHA is one of the alternatives to replace the synthetic plastic due to its high degrading capacity.
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Affiliation(s)
- Dhara Patel
- Department of Biological Sciences and Biotechnology, Indian Institute of Advanced Research, University of Innovation, Koba Institutional Area, Gandhinagar 382426, India.
| | - Dhruv Mamtora
- Department of Biological Sciences and Biotechnology, Indian Institute of Advanced Research, University of Innovation, Koba Institutional Area, Gandhinagar 382426, India
| | - Anushree Kamath
- Department of Biological Sciences and Biotechnology, Indian Institute of Advanced Research, University of Innovation, Koba Institutional Area, Gandhinagar 382426, India.
| | - Arpit Shukla
- Department of Biological Sciences and Biotechnology, Indian Institute of Advanced Research, University of Innovation, Koba Institutional Area, Gandhinagar 382426, India.
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21
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Singh G, Bhadange S, Bhawna F, Shewale P, Dahiya R, Aggarwal A, Manju F, Arya SK. Phytoremediation of radioactive elements, possibilities and challenges: special focus on agricultural aspects. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2022; 25:1-8. [PMID: 35244498 DOI: 10.1080/15226514.2022.2043239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The radioactive contamination has been reported frequently from agricultural lands and ground water. The main reason behind the radioactive pollution is unprotected mining of radioactive elements, unsafe discard of nuclear industrial waste, military applications, dumping of medically used radioisotopes, globally situated (>400) nuclear power plants and use of phosphate fertilizers in farming. Radionuclides are well known potent carcinogens that may cause the various types of cancers to human and animals due to the long exposure to radioactive contaminated sites. To get rid of from the radioactive pollution there is a need of practically successful and cost effective bioremediation technologies that should able to decontaminate the effected lands and water to benefit the mankind. Microbial and phytoremediation are well studied methods for decreasing or gradually eliminating the radioactive contaminants. In this review, we discussed the different strategies of microbial and phytoremediation of radionuclides and recent advancements, that can play the major role in bioremediation of soil and water.
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Affiliation(s)
- Gursharan Singh
- Department of Medical Laboratory Sciences, Lovely Professional University, Phagwara, India
| | - Surabhi Bhadange
- Department of Medical Laboratory Sciences, Lovely Professional University, Phagwara, India
| | - Fnu Bhawna
- Department of Medical Laboratory Sciences, Lovely Professional University, Phagwara, India
| | - Pratiksha Shewale
- Department of Medical Laboratory Sciences, Lovely Professional University, Phagwara, India
| | - Rahul Dahiya
- Department of Medical Laboratory Sciences, Lovely Professional University, Phagwara, India
| | | | - Fnu Manju
- Department of Medical Laboratory Sciences, Lovely Professional University, Phagwara, India
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22
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You W, Peng W, Tian Z, Zheng M. Uranium bioremediation with U(VI)-reducing bacteria. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 798:149107. [PMID: 34325147 DOI: 10.1016/j.scitotenv.2021.149107] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 07/13/2021] [Accepted: 07/13/2021] [Indexed: 06/13/2023]
Abstract
Uranium (U) pollution is an environmental hazard caused by the development of the nuclear industry. Microbial reduction of hexavalent uranium (U(VI)) to tetravalent uranium (U(IV)) reduces U solubility and mobility and has been proposed as an effective method to remediate uranium contamination. In this review, U(VI) remediation with respect to U(VI)-reducing bacteria, mechanisms, influencing factors, products, and reoxidation are systematically summarized. Reportedly, some metal- and sulfate-reducing bacteria possess excellent U(VI) reduction capability through mechanisms involving c-type cytochromes, extracellular pili, electron shuttle, or thioredoxin reduction. In situ remediation has been demonstrated as an ideal strategy for large-scale degradation of uranium contaminants than ex situ. However, U(VI) reduction efficiency can be affected by various factors, including pH, temperature, bicarbonate, electron donors, and coexisting metal ions. Furthermore, it is noteworthy that the reduction products could be reoxidized when exposed to oxygen and nitrate, inevitably compromising the remediation effects, especially for non-crystalline U(IV) with weak stability.
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Affiliation(s)
- Wenbo You
- Key Laboratory of Regional Energy Systems Optimization, Ministry of Education, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
| | - Wanting Peng
- Key Laboratory of Regional Energy Systems Optimization, Ministry of Education, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
| | - Zhichao Tian
- Key Laboratory of Regional Energy Systems Optimization, Ministry of Education, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
| | - Maosheng Zheng
- Key Laboratory of Regional Energy Systems Optimization, Ministry of Education, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China.
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23
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Yoon W, Park Y, Kim S, Park Y, Kim CY. Combined Therapy with microRNA-Expressing Salmonella and Irradiation in Melanoma. Microorganisms 2021; 9:microorganisms9112408. [PMID: 34835533 PMCID: PMC8621892 DOI: 10.3390/microorganisms9112408] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 11/17/2021] [Accepted: 11/19/2021] [Indexed: 02/06/2023] Open
Abstract
Anticancer treatment strategies using bacteria as a vector are currently expanding with the development of anticancer drugs. Here, we present a research strategy to develop anticancer drugs using bacteria that contain miRNAs. We also present a strategy for the development of novel bacterial anticancer drugs in combination with radiation. Salmonella strains expressing miRNA were produced by modifying the miRNA expression vector encoding INHA, a radiation-resistant gene developed previously. The anticancer effect of INHA was confirmed using skin cancer cell lines. We also tested a combination strategy comprising bacteria and radiation for its anticancer efficacy against radiation-resistant mouse melanoma to increase the efficacy of radiation therapy as a novel strategy. The recombinant strain was confirmed to promote effective cell death even when combined with radiation therapy, which exerts its cytotoxicity by enhancing reactive oxygen species production. Moreover, a combination of bacterial and radiation therapy enhanced radiotherapy efficacy. When combined with radiation therapy, bacterial therapy exhibited effective anti-cancer properties even when administered to animals harboring radiation-resistant tumors. This strategy may promote the secretion of cytokines in cells and more effectively reduce the number of bacteria remaining in the animal. Thus, this study may lead to the development of a strategy to improve the effectiveness of radiation therapy using Salmonella expressing cancer-specific miRNA for intractable cancers such as those resistant to radiation.
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Affiliation(s)
- Wonsuck Yoon
- Allergy Immunology Center, College of Medicine, Korea University, Seoul 02841, Korea;
- Department of Life Science and Biotechnology, Korea University, Seoul 02841, Korea; (Y.P.); (Y.P.)
- Correspondence: (W.Y.); (C.Y.K.)
| | - Yongsung Park
- Department of Life Science and Biotechnology, Korea University, Seoul 02841, Korea; (Y.P.); (Y.P.)
| | - Seunghyun Kim
- Allergy Immunology Center, College of Medicine, Korea University, Seoul 02841, Korea;
| | - Yongkeun Park
- Department of Life Science and Biotechnology, Korea University, Seoul 02841, Korea; (Y.P.); (Y.P.)
| | - Chul Yong Kim
- Department of Radiation Oncology, College of Medicine, Korea University, Seoul 02841, Korea
- Correspondence: (W.Y.); (C.Y.K.)
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24
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Shukla A, Shukla G, Parmar P, Patel B, Goswami D, Saraf M. Exemplifying the next generation of antibiotic susceptibility intensifiers of phytochemicals by LasR-mediated quorum sensing inhibition. Sci Rep 2021; 11:22421. [PMID: 34789810 PMCID: PMC8599845 DOI: 10.1038/s41598-021-01845-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 11/08/2021] [Indexed: 01/27/2023] Open
Abstract
There persists a constant threat from multidrug resistance being acquired by all human pathogens that challenges the well-being of humans. This phenomenon is predominantly led by Pseudomonas aeruginosa which is already resistant to the current generations of antibiotic by altering its metabolic pathways to survive. Specifically for this microbe the phenomenon of quorum sensing (QS) plays a crucial role in acquiring virulence and pathogenicity. QS is simply the cross talk between the bacterial community driven by signals that bind to receptors, enabling the entire bacterial microcosm to function as a single unit which has led to control P. aeruginosa cumbersome even in presence of antibiotics. Inhibition of QS can, therefore, be of a significant importance to curb such virulent and pathogenic strains of P. aeruginosa. Natural compounds are well known for their antimicrobial properties, of which, information on their mode of action is scarce. There can be many antimicrobial phytochemicals that act by hindering QS-pathways. The rationale of the current study is to identify such natural compounds that can inhibit QS in P. aeruginosa driven by LasR, PhzR, and RhlR dependent pathways. To achieve this rationale, in silico studies were first performed to identify such natural compounds which were then validated by in vitro experiments. Gingerol and Curcumin were identified as QS-antagonists (QSA) which could further suppress the production of biofilm, EPS, pyocyanin, and rhamnolipid along with improving the susceptibility to antibiotics.
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Affiliation(s)
- Arpit Shukla
- Department of Microbiology & Biotechnology, University School of Sciences, Gujarat University, Ahmedabad, Gujarat, 380009, India
- Department of Biological Sciences & Biotechnology, Indian Institute of Advanced Research, Gandhinagar, Gujarat, 382426, India
| | - Gaurav Shukla
- Pandit Deendayal Energy University, Raysan, Gandhinagar, Gujarat, 382426, India
| | - Paritosh Parmar
- Department of Microbiology & Biotechnology, University School of Sciences, Gujarat University, Ahmedabad, Gujarat, 380009, India
| | - Baldev Patel
- Department of Microbiology & Biotechnology, University School of Sciences, Gujarat University, Ahmedabad, Gujarat, 380009, India
| | - Dweipayan Goswami
- Department of Microbiology & Biotechnology, University School of Sciences, Gujarat University, Ahmedabad, Gujarat, 380009, India.
| | - Meenu Saraf
- Department of Microbiology & Biotechnology, University School of Sciences, Gujarat University, Ahmedabad, Gujarat, 380009, India.
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Nayak T, Sengupta I, Dhal PK. A new era of radiation resistance bacteria in bioremediation and production of bioactive compounds with therapeutic potential and other aspects: An in-perspective review. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2021; 237:106696. [PMID: 34265519 DOI: 10.1016/j.jenvrad.2021.106696] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 06/29/2021] [Accepted: 07/01/2021] [Indexed: 06/13/2023]
Abstract
Microorganisms that survive in extreme environmental conditions are known as 'extremophiles'. Recently, extremophiles draw an impression in biotechnology/pharmaceutical researches/industries because of their novel molecules, known as 'extremolytes'. The intriguing phenomenon of microbial radiation resistance probably arose independently throughout their evolution of selective pressures (e.g. UV, X-ray, Gamma radiation etc.). Radiation produces multiple types of damage/oxidation to nucleic acids, proteins and other crucial cellular components. Most of the literature on microbial radiation resistance is based on acute γ-irradiation experiments performed in the laboratory, typically involving pure cultures isolation and their application on bioremediation/therapeutic field. There is much less information other than bioremediation and therapeutic application of such promising microbes we called as 'new era'. Here we discus origin and diversity of radiation resistance bacteria as well as selective mechanisms by which microorganisms can sustain in radiation rich environment. Potential uses of these radiations resistant microbes in the field of bioremediation, bioactive compounds and therapeutic industry. Last but not the least, which is the new aspect of radiation resistance microbes. Our review suggest that resistance to chronic radiation is not limited to rare specialized strains from extreme environments, but can occur among common microbial taxa, perhaps due to overlap molecular mechanisms of resistance to radiation and other stressors. These stress tolerance potential make them potential for radionuclides remediation, their extremolytes can be useful as anti-oxidant and anti-proliferative agents. In current scenario they can be useful in various fields from natural dye synthesis to nanoparticles production and anti-cancer treatment.
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Affiliation(s)
- Tilak Nayak
- Department of Life Science and Biotechnology, Jadavpur University, Kolkata, 700032, India.
| | - Indraneel Sengupta
- Department of Life Science and Biotechnology, Jadavpur University, Kolkata, 700032, India.
| | - Paltu Kumar Dhal
- Department of Life Science and Biotechnology, Jadavpur University, Kolkata, 700032, India.
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Exemplifying an archetypal thorium-EPS complexation by novel thoriotolerant Providencia thoriotolerans AM3. Sci Rep 2021; 11:3189. [PMID: 33542436 PMCID: PMC7862642 DOI: 10.1038/s41598-021-82863-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 01/27/2021] [Indexed: 12/23/2022] Open
Abstract
It is the acquisition of unique traits that adds to the enigma of microbial capabilities to carry out extraordinary processes. One such ecosystem is the soil exposed to radionuclides, in the vicinity of atomic power stations. With the aim to study thorium (Th) tolerance in the indigenous bacteria of such soil, the bacteria were isolated and screened for maximum thorium tolerance. Out of all, only one strain AM3, found to tolerate extraordinary levels of Th (1500 mg L−1), was identified to be belonging to genus Providencia and showed maximum genetic similarity with the type strain P. vermicola OP1T. This is the first report suggesting any bacteria to tolerate such high Th and we propose to term such microbes as ‘thoriotolerant’. The medium composition for cultivating AM3 was optimized using response surface methodology (RSM) which also led to an improvement in its Th-tolerance capabilities by 23%. AM3 was found to be a good producer of EPS and hence one component study was also employed for its optimization. Moreover, the EPS produced by the strain showed interaction with Th, which was deduced by Fourier Transform Infrared (FTIR) spectroscopy.
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Ruiz-Fresneda MA, Lopez-Fernandez M, Martinez-Moreno MF, Cherkouk A, Ju-Nam Y, Ojeda JJ, Moll H, Merroun ML. Molecular Binding of Eu III/Cm III by S tenotrophomonas bentonitica and Its Impact on the Safety of Future Geodisposal of Radioactive Waste. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:15180-15190. [PMID: 33185105 DOI: 10.1021/acs.est.0c02418] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Microbial communities occurring in reference materials for artificial barriers (e.g., bentonites) in future deep geological repositories of radioactive waste can influence the migration behavior of radionuclides such as curium (CmIII). This study investigates the molecular interactions between CmIII and its inactive analogue europium (EuIII) with the indigenous bentonite bacterium Stenotrophomonas bentonitica at environmentally relevant concentrations. Potentiometric studies showed a remarkably high concentration of phosphates at the bacterial cell wall compared to other bacteria, revealing the great potential of S. bentonitica for metal binding. Infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS) confirmed the role of phosphates and carboxylate groups from the cell envelope in the bioassociation of EuIII. Additionally, time-resolved laser-induced fluorescence spectroscopy (TRLFS) identified phosphoryl and carboxyl groups from bacterial envelopes, among other released complexing agents, to be involved in the EuIII and CmIII coordination. The ability of this bacterium to form a biofilm at the surface of bentonites allows them to immobilize trivalent lanthanide and actinides in the environment.
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Affiliation(s)
| | | | | | - Andrea Cherkouk
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Dresden, Germany
| | - Yon Ju-Nam
- Systems and Process Engineering Centre, College of Engineering, Swansea University, Swansea, U.K
| | - Jesus J Ojeda
- Systems and Process Engineering Centre, College of Engineering, Swansea University, Swansea, U.K
| | - Henry Moll
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Dresden, Germany
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29
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Jeong SW, Choi YJ. Extremophilic Microorganisms for the Treatment of Toxic Pollutants in the Environment. Molecules 2020; 25:E4916. [PMID: 33114255 PMCID: PMC7660605 DOI: 10.3390/molecules25214916] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 10/20/2020] [Accepted: 10/23/2020] [Indexed: 12/13/2022] Open
Abstract
As concerns about the substantial effect of various hazardous toxic pollutants on the environment and public health are increasing, the development of effective and sustainable treatment methods is urgently needed. In particular, the remediation of toxic components such as radioactive waste, toxic heavy metals, and other harmful substances under extreme conditions is quite difficult due to their restricted accessibility. Thus, novel treatment methods for the removal of toxic pollutants using extremophilic microorganisms that can thrive under extreme conditions have been investigated during the past several decades. In this review, recent trends in bioremediation using extremophilic microorganisms and related approaches to develop them are reviewed, with relevant examples and perspectives.
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Affiliation(s)
| | - Yong Jun Choi
- School of Environmental Engineering, University of Seoul, Seoul 02504, Korea;
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Jefanova O, Baužienė I, Lujanienė G, Švedienė J, Raudonienė V, Bridžiuvienė D, Paškevičius A, Levinskaitė L, Žvirgždas J, Petrošius R, Skuratovič Ž, Mažeika J. Initiation of radioecological monitoring of forest soils and plants at the Lithuanian border region before the start of the Belarusian nuclear power plant operation. ENVIRONMENTAL MONITORING AND ASSESSMENT 2020; 192:666. [PMID: 33001295 DOI: 10.1007/s10661-020-08638-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 09/24/2020] [Indexed: 06/11/2023]
Abstract
Knowledge of the background activity concentrations of anthropogenic radionuclides before the start of operation of the new nuclear power plant in Belarus, BelNPP, is an issue of great importance for neighbouring countries. In this study, we provide the pilot characterisation of the Lithuanian part of the 30-km zone of the BelNPP, emphasising the forest plants, terrestrial mosses, forest organic and mineral topsoil to describe the preoperational radioecological state of the pine forest ecosystem. Key anthropogenic radionuclides (14C, 3H, 137Cs and 239,240Pu) were analysed. The 14C specific activity varied from 97.80 ± 1.30 to 102.40 ± 0.79 pMC. The 3H specific activity in the tissue-free water tritium form varied from 13.2 ± 2.2 TU to 20.8 ± 2.3 TU, which corresponded to the 3H level of precipitation in this region. The activity concentrations of 239,240Pu in soil and moss samples did not exceed 1 Bq/kg and were mainly due to global fallout after nuclear tests. The 137Cs inventory in the pine forest soils of the Lithuanian part of the BelNPP 30-km zone varied from 930 ± 70 to 1650 ± 430 Bq/m2. High variation of the inventory and uneven distribution in the soil profile conditioned a wide range of 137Сs activity in terrestrial plants from 1.0 ± 0.5 to 40.5 ± 1.8 Bq/kg dry weight. The abundance of microorganisms in different seasons and soil depths do not exceed the natural levels. According to PCA loads, the number of microorganisms and variability of 137Cs specific activity is determined by soil abiotic parameters.
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Affiliation(s)
- Olga Jefanova
- Laboratory of Nuclear Geophysics and Radioecology, State Institute Nature Research Centre, Akademijos 2, 08412, Vilnius, Lithuania
| | - Ieva Baužienė
- Laboratory of Geoenvironmental Research, State Institute Nature Research Centre, Akademijos 2, 08412, Vilnius, Lithuania.
| | - Galina Lujanienė
- Department of Environmental Research, State Research Institute Center for Physical Sciences and Technology, Saulėtekio av. 3, 10257, Vilnius, Lithuania
| | - Jurgita Švedienė
- Laboratory of Biodeterioration Research, State Institute Nature Research Centre, Akademijos 2, 08412, Vilnius, Lithuania
| | - Vita Raudonienė
- Laboratory of Biodeterioration Research, State Institute Nature Research Centre, Akademijos 2, 08412, Vilnius, Lithuania
| | - Danguolė Bridžiuvienė
- Laboratory of Biodeterioration Research, State Institute Nature Research Centre, Akademijos 2, 08412, Vilnius, Lithuania
| | - Algimantas Paškevičius
- Laboratory of Biodeterioration Research, State Institute Nature Research Centre, Akademijos 2, 08412, Vilnius, Lithuania
| | - Loreta Levinskaitė
- Laboratory of Biodeterioration Research, State Institute Nature Research Centre, Akademijos 2, 08412, Vilnius, Lithuania
| | - Jonas Žvirgždas
- Laboratory of Biodeterioration Research, State Institute Nature Research Centre, Akademijos 2, 08412, Vilnius, Lithuania
| | - Rimantas Petrošius
- Laboratory of Nuclear Geophysics and Radioecology, State Institute Nature Research Centre, Akademijos 2, 08412, Vilnius, Lithuania
| | - Žana Skuratovič
- Laboratory of Nuclear Geophysics and Radioecology, State Institute Nature Research Centre, Akademijos 2, 08412, Vilnius, Lithuania
| | - Jonas Mažeika
- Laboratory of Nuclear Geophysics and Radioecology, State Institute Nature Research Centre, Akademijos 2, 08412, Vilnius, Lithuania
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Sánchez-Castro I, Martínez-Rodríguez P, Jroundi F, Solari PL, Descostes M, Merroun ML. High-efficient microbial immobilization of solved U(VI) by the Stenotrophomonas strain Br8. WATER RESEARCH 2020; 183:116110. [PMID: 32659540 DOI: 10.1016/j.watres.2020.116110] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 06/23/2020] [Accepted: 06/24/2020] [Indexed: 06/11/2023]
Abstract
The environmental impact of uranium released during nuclear power production and related mining activity is an issue of great concern. Innovative environmental-friendly water remediation strategies, like those based on U biomineralization through phosphatase activity, are desirable. Here, we report the great U biomineralization potential of Stenotrophomonas sp. Br8 CECT 9810 over a wide range of physicochemical and biological conditions. Br8 cells exhibited high phosphatase activity which mediated the release of orthophosphate in the presence of glycerol-2-phosphate around pH 6.3. Mobile uranyl ions were bioprecipitated as needle-like fibrils at the cell surface and in the extracellular space, as observed by Scanning Transmission Electron Microscopy (STEM). Extended X-Ray Absorption Fine Structure (EXAFS) and X-Ray Diffraction (XRD) analyses showed the local structure of biogenic U precipitates to be similar to that of meta-autunite. In addition to the active U phosphate biomineralization process, the cells interact with this radionuclide through passive biosorption, removing up to 373 mg of U per g of bacterial dry biomass. The high U biomineralization capacity of the studied strain was also observed under different conditions of pH, temperature, etc. Results presented in this work will help to design efficient U bioremediation strategies for real polluted waters.
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Affiliation(s)
- Iván Sánchez-Castro
- Department of Microbiology, University of Granada, Campus Fuentenueva s/n, 18071, Granada, Spain.
| | - Pablo Martínez-Rodríguez
- Department of Microbiology, University of Granada, Campus Fuentenueva s/n, 18071, Granada, Spain
| | - Fadwa Jroundi
- Department of Microbiology, University of Granada, Campus Fuentenueva s/n, 18071, Granada, Spain
| | - Pier Lorenzo Solari
- Synchrotron SOLEIL, MARS beamline, L'Orme des Merisiers, Saint-Aubin BP 48, 91192, Gif-sur-Yvette Cedex, France
| | | | - Mohamed Larbi Merroun
- Department of Microbiology, University of Granada, Campus Fuentenueva s/n, 18071, Granada, Spain
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Yu K, Shao P, Meng P, Chen T, Lei J, Yu X, He R, Yang F, Zhu W, Duan T. Superhydrophilic and highly elastic monolithic sponge for efficient solar-driven radioactive wastewater treatment under one sun. JOURNAL OF HAZARDOUS MATERIALS 2020; 392:122350. [PMID: 32109799 DOI: 10.1016/j.jhazmat.2020.122350] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 02/16/2020] [Accepted: 02/17/2020] [Indexed: 06/10/2023]
Abstract
As an effective way to obtain solar energy and separate the soluble contaminants from water, solar-driven interfacial evaporation is used in desalination, wastewater treatment, electricity generation, and domestic water heating system. Herein, we demonstrate a monolithic sponge with three-dimensional porous structure as the solar-energy evaporator, which is composed of hydrophilic polymer (Konjac Glucomannan, KGM) and solar absorbent (reduced graphene oxide, rGO). Under one sun irradiation, the sponge achieves a rapid evaporation rate (1.60 kg m-2 h-1) and high interfacial water evaporation efficiency (92 %) due to its good absorption, photothermal, thermal insulation, and fast water transport properties. Meanwhile, the concentrations of radioactive elements (strontium, cesium, and uranium) in wastewater dropped from grams to micrograms after purification, even under radiation and acidic conditions. Additionally, the durability and repeatability of the sponge also have been verified. The results showed that solar-driven interfacial evaporation can effectively treat radioactive wastewater and enrich various radionuclides in a more energy-saving manner.
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Affiliation(s)
- Kaifu Yu
- Nuclear Waste and Environmental Safety Key Laboratory of Defense, State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Sichuan Civil-military Integration Institute, School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang 621010, China
| | - Pengfei Shao
- Nuclear Waste and Environmental Safety Key Laboratory of Defense, State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Sichuan Civil-military Integration Institute, School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang 621010, China
| | - Pengwei Meng
- Nuclear Waste and Environmental Safety Key Laboratory of Defense, State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Sichuan Civil-military Integration Institute, School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang 621010, China
| | - Tao Chen
- Nuclear Waste and Environmental Safety Key Laboratory of Defense, State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Sichuan Civil-military Integration Institute, School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang 621010, China
| | - Jia Lei
- Nuclear Waste and Environmental Safety Key Laboratory of Defense, State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Sichuan Civil-military Integration Institute, School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang 621010, China
| | - Xiaofang Yu
- Institute of Nuclear Physics and Chemistry, Chinese Academy of Engineering Physics, Mianyang 621900, China
| | - Rong He
- Nuclear Waste and Environmental Safety Key Laboratory of Defense, State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Sichuan Civil-military Integration Institute, School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang 621010, China
| | - Fan Yang
- Nuclear Waste and Environmental Safety Key Laboratory of Defense, State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Sichuan Civil-military Integration Institute, School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang 621010, China
| | - Wenkun Zhu
- Nuclear Waste and Environmental Safety Key Laboratory of Defense, State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Sichuan Civil-military Integration Institute, School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang 621010, China.
| | - Tao Duan
- Nuclear Waste and Environmental Safety Key Laboratory of Defense, State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, Sichuan Civil-military Integration Institute, School of National Defence Science & Technology, Southwest University of Science and Technology, Mianyang 621010, China.
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Choi WS, Cho SH, Lee YJ, Kim YS, Lee JH. Separation behavior of nickel and cobalt in a LiCl-KCl-NiCl2 molten salt by electrorefining process. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114175] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Haanes H, Hansen EL, Hevrøy TH, Jensen LK, Gjelsvik R, Jaworska A, Bradshaw C. Realism and usefulness of multispecies experiment designs with regard to application in radioecology: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 718:134485. [PMID: 31839283 DOI: 10.1016/j.scitotenv.2019.134485] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 09/13/2019] [Accepted: 09/14/2019] [Indexed: 06/10/2023]
Abstract
Multispecies experiments like microcosms and mesocosms are widely used in many fields of research but not in radioecology. In radioecology, size limitations are important as large experimental volumes involve problems with waste (radionuclides), or shielding, absorption and available space in gamma fields (often within a climate chamber). We have therefore performed a literature review (ISI Web of Science, n = 406) of the design and properties of multispecies effect studies <100 L in size and with three or more mentioned taxa in other research fields to assess their suitability to radioecology. Studies with more mentioned taxa assess structural ecosystem parameters more often than studies with fewer mentioned taxa, while the opposite trend is seen for indirect effects/interactions. Studies of indirect effects benefit from more replicates and longer experiments. Almost all studies assess some ecosystem level parameter but only a quarter take a holistic approach assessing both structural and functional as well as indirect effects. We find that most cosms are custom-made systems, rather than standardised designs. Unmanipulated cosms consist of excised portions of the natural environment with a higher number of mentioned taxa, high ecological complexity and high realism, but have a relatively low replicability. In contrast, standardised cosms with fewer mentioned taxa have less ecological complexity but much higher replicability. This literature review shows that smaller cosm sizes have similar ecological complexity (e.g. number of taxa and trophic levels) and experimental duration as larger sized cosms, allowing for ecologically-relevant investigations, despite their small size. We encourage multispecies radioecology studies, preferably with environmental relevant doses and sufficient detail on dosimetry.
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Affiliation(s)
- Hallvard Haanes
- Norwegian Radiation and Nuclear Safety Authority, P.O. Box 329 Skøyen, NO-0213 Oslo, Norway; Centre for Environmental Radioactivity (CERAD CoE), P.O. Box 5003, NO-1432 Ås, Norway.
| | - Elisabeth Lindbo Hansen
- Norwegian Radiation and Nuclear Safety Authority, P.O. Box 329 Skøyen, NO-0213 Oslo, Norway; Centre for Environmental Radioactivity (CERAD CoE), P.O. Box 5003, NO-1432 Ås, Norway.
| | - Tanya Helena Hevrøy
- Norwegian Radiation and Nuclear Safety Authority, P.O. Box 329 Skøyen, NO-0213 Oslo, Norway; Centre for Environmental Radioactivity (CERAD CoE), P.O. Box 5003, NO-1432 Ås, Norway.
| | - Louise Kiel Jensen
- Centre for Environmental Radioactivity (CERAD CoE), P.O. Box 5003, NO-1432 Ås, Norway; Norwegian Radiation and Nuclear Safety Authority, The Fram Centre, P.O. Box 6606 Langnes, 9296 Tromsø, Norway.
| | - Runhild Gjelsvik
- Norwegian Radiation and Nuclear Safety Authority, P.O. Box 329 Skøyen, NO-0213 Oslo, Norway; Centre for Environmental Radioactivity (CERAD CoE), P.O. Box 5003, NO-1432 Ås, Norway.
| | - Alicja Jaworska
- Norwegian Radiation and Nuclear Safety Authority, P.O. Box 329 Skøyen, NO-0213 Oslo, Norway; Centre for Environmental Radioactivity (CERAD CoE), P.O. Box 5003, NO-1432 Ås, Norway.
| | - Clare Bradshaw
- Department of Ecology, Environment and Plant Sciences, Stockholm University, 10691 Stockholm, Sweden.
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Shukla A, Parmar P, Goswami D, Patel B, Saraf M. Characterization of novel thorium tolerant Ochrobactrum intermedium AM7 in consort with assessing its EPS-Thorium binding. JOURNAL OF HAZARDOUS MATERIALS 2020; 388:122047. [PMID: 31954311 DOI: 10.1016/j.jhazmat.2020.122047] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 01/04/2020] [Accepted: 01/06/2020] [Indexed: 05/23/2023]
Abstract
Currently, radioactive waste is disposed primarily by burial in a deep geological repository. Microorganisms thriving in such contaminated environment show tolerance to radionuclides. In the present study the bacterial flora, from soil sample collected from an area around atomic power station exposed to radionuclides and heavy metals, was cultivated and assessed for thorium (Th) tolerance. Of all the isolates, strain AM7 identified as O. intermedium was selected since it could thrive at high levels of Th (1000 mg L-1). AM7 was characterized physico-chemically and its culture medium was optimized using central composite design of response surface methodology for assessing its growth properties in presence of Th. The strain also showed exceptional exopolysaccharide (EPS) production and its yield was further analyzed using one factor study to investigate the influence of each medium component. On supplementing the EPS medium with Th, no significant decrease in yield was observed. FTIR spectroscopy revealed the functional groups of EPS involved in EPS-Th binding. To the best of our knowledge, this is the first report showing exceptional Th-tolerance by any bacteria. Such study will help other researchers to strategize an environment-friendly way of radwaste disposal.
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Affiliation(s)
- Arpit Shukla
- Department of Microbiology & Biotechnology, University School of Sciences, Gujarat University, Ahmedabad, 380009, Gujarat, India
| | - Paritosh Parmar
- Department of Microbiology & Biotechnology, University School of Sciences, Gujarat University, Ahmedabad, 380009, Gujarat, India
| | - Dweipayan Goswami
- Department of Microbiology & Biotechnology, University School of Sciences, Gujarat University, Ahmedabad, 380009, Gujarat, India
| | - Baldev Patel
- Department of Microbiology & Biotechnology, University School of Sciences, Gujarat University, Ahmedabad, 380009, Gujarat, India
| | - Meenu Saraf
- Department of Microbiology & Biotechnology, University School of Sciences, Gujarat University, Ahmedabad, 380009, Gujarat, India.
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Lou L, Huang Q, Lou Y, Lu J, Hu B, Lin Q. Adsorption and degradation in the removal of nonylphenol from water by cells immobilized on biochar. CHEMOSPHERE 2019; 228:676-684. [PMID: 31063914 PMCID: PMC6771920 DOI: 10.1016/j.chemosphere.2019.04.151] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 03/28/2019] [Accepted: 04/20/2019] [Indexed: 05/23/2023]
Abstract
To investigate the role of adsorption by biochar and biodegradation by bacteria in the wastewater treatment system of microorganisms immobilized on biochar, Nonylphenol (NP) removal (adsorption + degradation) rates and degradation rates from water by NP degrading bacteria immobilized on bamboo charcoal (BC) and wood charcoal (WC) were examined in a short-term and long-term. Results showed that cells immobilized on different biochar had different NP removal effects, and cells immobilized on bamboo charcoal (I-BC) was better. After eight rounds of long-term reuse, the cumulative removal rate and the degradation rate of NP in water by I-BC were 93.95% and 41.86%, respectively, significantly higher than those of cells immobilized on wood charcoal (69.60%, 22.78%) and free cells (64.79%, 19.49%) (P < 0.01). The rise in the ratio of the degradation rate to the removal rate indicated that the long-term NP removal effect is more dependent on biodegradation. The amount of residual NP in I-BC still accounted for about 50%, indicating that the secondary pollution in the disposal of carrier could not be ignored. In addition, promotion effect of biochar on microorganisms were observed by SEM, quantitative PCR and 16S rRNA. Pseudomonas, Achromobacter, Ochrobactrum and Stenotrophomonas were predominant bacteria for NP degradation. The addition of biochar (especially bamboo charcoal) also effectively delayed the transformation of their community structure.
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MESH Headings
- Adsorption
- Bacteria/genetics
- Bacteria/metabolism
- Biodegradation, Environmental
- Bioreactors/microbiology
- Cells, Immobilized
- Charcoal/chemistry
- Microbial Consortia/genetics
- Microscopy, Electron, Scanning
- Phenols/chemistry
- Phenols/isolation & purification
- RNA, Ribosomal, 16S
- Sasa/chemistry
- Waste Disposal, Fluid/instrumentation
- Waste Disposal, Fluid/methods
- Wastewater/chemistry
- Water Pollutants, Chemical/chemistry
- Water Pollutants, Chemical/isolation & purification
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Affiliation(s)
- Liping Lou
- Department of Environmental Engineering, Zhejiang University, Hangzhou, 310029, People's Republic of China; Key Laboratory of Water Pollution Control and Environmental Safety of Zhejiang Province, Hangzhou, 310020, People's Republic of China.
| | - Qian Huang
- Department of Environmental Engineering, Zhejiang University, Hangzhou, 310029, People's Republic of China; Academy of Environmental Planning & Design, Co., Ltd., Nanjing University, Nanjing, 210093, People's Republic of China
| | - Yiling Lou
- Department of Environmental Engineering, Zhejiang University, Hangzhou, 310029, People's Republic of China
| | - Jingrang Lu
- Office of Research and Development, U.S. Environmental Protection Agency, Cincinnati, OH, 45220, USA
| | - Baolan Hu
- Department of Environmental Engineering, Zhejiang University, Hangzhou, 310029, People's Republic of China
| | - Qi Lin
- Department of Environmental Engineering, Zhejiang University, Hangzhou, 310029, People's Republic of China; Key Laboratory of Water Pollution Control and Environmental Safety of Zhejiang Province, Hangzhou, 310020, People's Republic of China.
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Enyedi NT, Anda D, Borsodi AK, Szabó A, Pál SE, Óvári M, Márialigeti K, Kovács-Bodor P, Mádl-Szőnyi J, Makk J. Radioactive environment adapted bacterial communities constituting the biofilms of hydrothermal spring caves (Budapest, Hungary). JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2019; 203:8-17. [PMID: 30844681 DOI: 10.1016/j.jenvrad.2019.02.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 02/12/2019] [Accepted: 02/19/2019] [Indexed: 06/09/2023]
Abstract
The thermal waters of Gellért Hill discharge area of the Buda Thermal Karst System (Hungary) are characterized by high (up to 1000 Bq/L) 222Rn-activity due to the radium-accumulating biogeochemical layers. Samples were taken from these ferruginous and calcareous layers developed on spring cave walls and water surface. Accumulation of potentially toxic metals (e.g. As, Hg, Pb, Sn, Sr, Zn) in the dense extracellular polymeric substance containing bacterial cells and remains was detected by inductively coupled plasma mass spectrometry. The comparison of bacterial phylogenetic diversity of the biofilm samples was performed by high throughput next generation sequencing (NGS). The analysis showed similar sets of mainly unidentified taxa of phyla Chloroflexi, Nitrospirae, Proteobacteria, Planctomycetes; however, large differences were found in their abundance. Cultivation-based method complemented with irradiation assay was performed using 5, 10 and 15 kGy doses of gamma-rays from a 60Co-source to reveal the extreme radiation-resistant bacteria. The phyla Actinobacteria, Firmicutes, Proteobacteria (classes Alpha- Beta- and Gammaproteobacteria), Bacteriodetes and Deinococcus-Thermus were represented among the 452 bacterial strains. The applied irradiation treatments promoted the isolation of 100 different species, involving candidate novel species, as well. The vast majority of the isolates belonged to bacterial taxa previously unknown as radiation-resistant microorganisms. Members of the genera Paracoccus, Marmoricola, Dermacoccus and Kytococcus were identified from the 15 kGy dose irradiated samples. The close relatives of several known radiation-tolerant bacteria were also detected from the biofilm samples, alongside with bacteria capable of detoxification by metal accumulation, adsorption and precipitation in the form of calcium-carbonate which possibly maintain the viability of the habitat. The results suggest the establishment of a unique, extremophilic microbiota in the studied hydrothermal spring caves.
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Affiliation(s)
- Nóra Tünde Enyedi
- Department of Microbiology, ELTE Eötvös Loránd University, Pázmány P. sétány 1/C, H-1117, Budapest, Hungary.
| | - Dóra Anda
- Department of Microbiology, ELTE Eötvös Loránd University, Pázmány P. sétány 1/C, H-1117, Budapest, Hungary; Danube Research Institute, MTA Centre for Ecological Research, Karolina út 29, H-1113, Budapest, Hungary.
| | - Andrea K Borsodi
- Department of Microbiology, ELTE Eötvös Loránd University, Pázmány P. sétány 1/C, H-1117, Budapest, Hungary; Danube Research Institute, MTA Centre for Ecological Research, Karolina út 29, H-1113, Budapest, Hungary.
| | - Attila Szabó
- Department of Microbiology, ELTE Eötvös Loránd University, Pázmány P. sétány 1/C, H-1117, Budapest, Hungary.
| | - Sára Eszter Pál
- Department of Microbiology, ELTE Eötvös Loránd University, Pázmány P. sétány 1/C, H-1117, Budapest, Hungary.
| | - Mihály Óvári
- Danube Research Institute, MTA Centre for Ecological Research, Karolina út 29, H-1113, Budapest, Hungary; Department of Analytical Chemistry, ELTE Eötvös Loránd University, Pázmány P. sétány 1/A, H-1117, Budapest, Hungary.
| | - Károly Márialigeti
- Department of Microbiology, ELTE Eötvös Loránd University, Pázmány P. sétány 1/C, H-1117, Budapest, Hungary.
| | - Petra Kovács-Bodor
- Department of Physical and Applied Geology, ELTE Eötvös Loránd University, Pázmány P. sétány 1/C, H-1117, Budapest, Hungary.
| | - Judit Mádl-Szőnyi
- Department of Physical and Applied Geology, ELTE Eötvös Loránd University, Pázmány P. sétány 1/C, H-1117, Budapest, Hungary.
| | - Judit Makk
- Department of Microbiology, ELTE Eötvös Loránd University, Pázmány P. sétány 1/C, H-1117, Budapest, Hungary.
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Hevrøy TH, Golz AL, Hansen EL, Xie L, Bradshaw C. Radiation effects and ecological processes in a freshwater microcosm. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2019; 203:71-83. [PMID: 30870637 DOI: 10.1016/j.jenvrad.2019.03.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2018] [Revised: 02/22/2019] [Accepted: 03/02/2019] [Indexed: 06/09/2023]
Abstract
Ecosystem response to gamma radiation exposure depends on the different species sensitivities and the multitude of direct and indirect pathways by which individual organisms can be affected, including the potential for complex interactions across multiple trophic levels. In this study, multi-species microcosms were used to investigate effects of ionizing radiation in a model freshwater ecosystem, including endpoints at both structural and functional levels and ecological interactions. Microcosms were exposed for 22 days to a gradient of gamma radiation with four dose rates from 0.72 to 19 mGy h-1, which are within the range of those seen at contaminated sites. Results showed significant dose related effects on photosynthetic parameters for all macrophyte species. No significant effects of radiation were observed for the consumers in the microcosms, however trends indicate the potential for longer-term effects. We also witnessed a different response of Daphnia magna and Lemna minor compared to previous single-species studies, illustrating the importance of multispecies studies, which aim to encompass systems more realistic to natural ecosystems. Microcosms allowed us to isolate specific relationships between interacting species in an ecosystem and test the effects, both direct and indirect, of radiation on them. In addition, the ecological pathways and processes, and the experimental design itself, was central to understanding the results we witnessed. This type of study is important for radioecology research that has been very much limited to high dose rates and single species studies. This approach to radioecology has been strongly promoted in recent decades and, to our knowledge, this is the first microcosm study performed at dose rates similar to those at contaminated field sites.
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Affiliation(s)
- Tanya H Hevrøy
- Norwegian Radiation and Nuclear Safety Authority, Grini næringspark 13, 1361, Østerås, Norway; CERAD Center of Excellence in Environmental Radioactivity, P.O. Box 5003, NO-1432, Ås, Norway.
| | - Anna-Lea Golz
- Department of Ecology, Environment and Plant Sciences, Stockholm University, 10691, Stockholm, Sweden.
| | - Elisabeth L Hansen
- Norwegian Radiation and Nuclear Safety Authority, Grini næringspark 13, 1361, Østerås, Norway; CERAD Center of Excellence in Environmental Radioactivity, P.O. Box 5003, NO-1432, Ås, Norway.
| | - Li Xie
- Norwegian Institute for Water Research, Gaustadalleen 21, 0349, Oslo, Norway.
| | - Clare Bradshaw
- Department of Ecology, Environment and Plant Sciences, Stockholm University, 10691, Stockholm, Sweden.
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Shukla A, Parmar P, Saraf M, Patel B. Isolation and screening of bacteria from radionuclide containing soil for bioremediation of contaminated sites. ACTA ACUST UNITED AC 2019. [DOI: 10.1007/s42398-019-00068-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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41
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Temporal changes of geochemistry and microbial community in low and intermediate level waste (LILW) repository, South Korea. ANN NUCL ENERGY 2019. [DOI: 10.1016/j.anucene.2019.01.029] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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42
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Zhang X, Gu P, Liu Y. Decontamination of radioactive wastewater: State of the art and challenges forward. CHEMOSPHERE 2019; 215:543-553. [PMID: 30342399 DOI: 10.1016/j.chemosphere.2018.10.029] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 10/04/2018] [Accepted: 10/06/2018] [Indexed: 06/08/2023]
Abstract
Radioactive substances have been widely used in many industrial sectors, e.g. nuclear power station, biomedical engineering, etc. With increasing applications of nuclear technology, more and more radioactive wastewater is being generated via different channels, which indeed is posing an emerging challenge and threat to the environment and human health. Given such a situation, this review attempts to offer a holistic view with regard to the state of the art of technology for decontamination of radioactive wastewater as well as shed lights on the challenges forward. Different from reclamation of other types of wastewaters, the most challenging issue in decontamination of radioactive wastewater is the effective stabilization and solidification of soluble radioactive nuclides present in wastewater, which are critical for final disposal. Moreover, the potential risk of human exposure to wastewater radiation needs to be carefully assessed, and this issue should also be taken into consideration in the selection, design and operation of the radioactive wastewater treatment process. These clearly differentiate the treatment principle of radioactive wastewater from those of traditional industrial and municipal wastewaters. Lastly, the challenges from the perspectives of technology development, environmental and human health impacts and possible solutions forward are also elucidated.
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Affiliation(s)
- Xiaoyuan Zhang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, China; Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, 637141, Singapore
| | - Ping Gu
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, China
| | - Yu Liu
- Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, 637141, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore.
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Qiu L, Feng J, Dai Y, Chang S. Mechanisms of strontium's adsorption by Saccharomyces cerevisiae: Contribution of surface and intracellular uptakes. CHEMOSPHERE 2019; 215:15-24. [PMID: 30300807 DOI: 10.1016/j.chemosphere.2018.09.168] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 09/17/2018] [Accepted: 09/28/2018] [Indexed: 06/08/2023]
Abstract
The objective of this work was to explore the mechanisms participating in strontium sorption by living Saccharomyces cerevisiae (S. cerevisiae). The location of strontium adsorbed by S. cerevisiae was studied by our plasmolysis treatment. The contribution of physical and chemical mechanisms was determined quantitatively by desorption and blockage of functional groups. Moreover, our results indicated that bioaccumulation also played a major role in biosorption by living cells. Thus, supplementary methods including 2-DE (two-dimensional electrophoresis) and Matrix-Assisted Laser Desorption/Ionization Tandem Time of Flight Mass Spectrometry (MALDI-TOF-TOF) were employed to analyze the different proteins. The subsequent desorption % of Sr2+ by Distilled Water (DW), NH4NO3 and EDTA-Na2 from Sr2+ loaded sorbents indicated a minor role for physical adsorption, while ion exchange and complexation were responsible for approximately 20% and 40%. Specific blockage of functional groups revealed that carboxyl and amine groups played an important role in Sr2+ binding to the living S. cerevisiae. From our MALDI-TOF-TOF results, we concluded that 38 proteins showed up-regulated expression profiles and 11 proteins showed down-regulated after biosorption. Moreover, proteins belong to: phagocytic function (Act1p); ion channel (S-adenosylmethionine synthase); glycolysis (Tubulin) may directly involve in strontium bioaccumulation. In conclusion, the present work indicates that the strontium sorption mechanism by living S. cerevisiae is complicated including ion-exchange along with complexation as the main mechanism, whereas the other mechanisms such as physical adsorption play a minor contribution. Metabolically-dependent proteins may play an important role in bioaccumulation.
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Affiliation(s)
- Liang Qiu
- Department of Materials Science and Technology, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, PR China
| | - Jundong Feng
- Department of Materials Science and Technology, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, PR China.
| | - Yaodong Dai
- Department of Materials Science and Technology, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, PR China
| | - Shuquan Chang
- Department of Materials Science and Technology, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, PR China
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44
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Post-Depositional Biodegradation Processes of Pollutants on Glacier Surfaces. CONDENSED MATTER 2018. [DOI: 10.3390/condmat3030024] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Glaciers are important fresh-water reservoirs for our planet. Although they are often located at high elevations or in remote areas, glacial ecosystems are not pristine, as many pollutants can undergo long-range atmospheric transport and be deposited on glacier surface, where they can be stored for long periods of time, and then be released into the down-valley ecosystems. Understanding the dynamics of these pollutants in glaciers is therefore important for assessing their environmental fate. To this aim, it is important to study cryoconite holes, small ponds filled with water and with a layer of sediment, the cryoconite, at the bottom, which occur on the surface of most glaciers. Indeed, these environments are hotspots of biodiversity on glacier surface as they host metabolically active bacterial communities that include generalist taxa able to degrade pollutants. In this work, we aim to review the studies that have already investigated pollutant (e.g., chlorpyrifos and polychlorinated-biphenyls (PCBs)) degradation in cryoconite holes and other supraglacial environmental matrices. These studies have revealed that bacteria play a significant role in pollutant degradation in these habitats and can be positively selected in contaminated environments. We will also provide indication for future research in this field.
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45
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Marques CR. Extremophilic Microfactories: Applications in Metal and Radionuclide Bioremediation. Front Microbiol 2018; 9:1191. [PMID: 29910794 PMCID: PMC5992296 DOI: 10.3389/fmicb.2018.01191] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2018] [Accepted: 05/16/2018] [Indexed: 12/21/2022] Open
Abstract
Metals and radionuclides (M&Rs) are a worldwide concern claiming for resilient, efficient, and sustainable clean-up measures aligned with environmental protection goals and global change constraints. The unique defense mechanisms of extremophilic bacteria and archaea have been proving usefulness towards M&Rs bioremediation. Hence, extremophiles can be viewed as microfactories capable of providing specific and controlled services (i.e., genetic/metabolic mechanisms) and/or products (e.g., biomolecules) for that purpose. However, the natural physiological plasticity of such extremophilic microfactories can be further explored to nourish different hallmarks of M&R bioremediation, which are scantly approached in the literature and were never integrated. Therefore, this review not only briefly describes major valuable extremophilic pathways for M&R bioremediation, as it highlights the advances, challenges and gaps from the interplay of ‘omics’ and biological engineering to improve extremophilic microfactories performance for M&R clean-up. Microfactories’ potentialities are also envisaged to close the M&R bioremediation processes and shift the classical idea of never ‘getting rid’ of M&Rs into making them ‘the belle of the ball’ through bio-recycling and bio-recovering techniques.
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Affiliation(s)
- Catarina R Marques
- Departamento de Biologia and Centro de Estudos do Ambiente e do Mar, Universidade de Aveiro, Aveiro, Portugal
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46
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Kielmann M, Prior C, Senge MO. Porphyrins in troubled times: a spotlight on porphyrins and their metal complexes for explosives testing and CBRN defense. NEW J CHEM 2018. [DOI: 10.1039/c7nj04679k] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A critical perspective on (metallo)porphyrins in security-related applications: the past, present and future of explosives detection, CBRN defense, and beyond.
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Affiliation(s)
- Marc Kielmann
- School of Chemistry
- SFI Tetrapyrrole Laboratory
- Trinity Biomedical Sciences Institute
- Trinity College Dublin
- The University of Dublin
| | - Caroline Prior
- School of Chemistry
- SFI Tetrapyrrole Laboratory
- Trinity Biomedical Sciences Institute
- Trinity College Dublin
- The University of Dublin
| | - Mathias O. Senge
- Medicinal Chemistry
- Trinity Translational Medicine Institute
- Trinity Centre for Health Sciences
- Trinity College Dublin
- The University of Dublin
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