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Li C, Zhang Y, Shi W, Peng Y, Han Y, Jiang S, Dong X, Zhang R. Viral diversity within marine biofilms and interactions with corrosive microbes. ENVIRONMENTAL RESEARCH 2024; 263:119991. [PMID: 39276831 DOI: 10.1016/j.envres.2024.119991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2024] [Revised: 08/25/2024] [Accepted: 09/11/2024] [Indexed: 09/17/2024]
Abstract
In marine environments, a wide variety of microbes like bacteria, and archaea influence on the corrosion of materials. Viruses are widely distributed in biofilms among these microbes and may affect the corrosion process through interactions with key corrosive prokaryotes. However, understanding of the viral communities within biofilms and their interactions with corrosive microbes remains is limited. To improve this knowledge gap, 53 metagenomes were utilized to investigate the diversity of viruses within biofilms on 8 different materials and their interactions with corrosive microbes. Notably, the viruses within biofilms predominantly belonged to Caudoviricetes, and phylogenetic analysis of Caudoviricetes and protein-sharing networks with other environments revealed the presence of numerous novel viral clades in biofilms. The virus‒host linkages revealed a close association between viruses and corrosive microbes in biofilms. This means that viruses may modulate host corrosion-related metabolism through auxiliary metabolic genes. It was observed that the virus could enhance host resistance to metals and antibiotics via horizontal gene transfer. Interestingly, viruses could protect themselves from host antiviral systems through anti-defense systems. This study illustrates the diversity of viruses within biofilms formed on materials and the intricate interactions between viruses and corrosive microbes, showing the potential roles of viruses in corrosive biofilms.
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Affiliation(s)
- Chengpeng Li
- Key Laboratory of Advanced Marine Materials, Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China; Key Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, 361005, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yimeng Zhang
- Key Laboratory of Advanced Marine Materials, Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
| | - Wenqing Shi
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Science, Xiamen University, Xiamen, 361102, China
| | - Yongyi Peng
- Key Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, 361005, China; School of Marine Sciences, Sun Yat-Sen University, Zhuhai, 519082, China
| | - Yingchun Han
- Key Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, 361005, China
| | - Shuqing Jiang
- Key Laboratory of Advanced Marine Materials, Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiyang Dong
- Key Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, 361005, China.
| | - Ruiyong Zhang
- Key Laboratory of Advanced Marine Materials, Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China; Institute of Marine Corrosion Protection, Guangxi Key Laboratory of Marine Environmental Science, Guangxi Academy of Sciences, Nanning, China.
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Mitzscherling J, Genderjahn S, Schleicher AM, Bartholomäus A, Kallmeyer J, Wagner D. Clay-associated microbial communities and their relevance for a nuclear waste repository in the Opalinus Clay rock formation. Microbiologyopen 2023; 12:e1370. [PMID: 37642485 PMCID: PMC10333725 DOI: 10.1002/mbo3.1370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 06/19/2023] [Accepted: 06/23/2023] [Indexed: 08/31/2023] Open
Abstract
Microorganisms are known to be natural agents of biocorrosion and mineral transformation, thereby potentially affecting the safety of deep geological repositories used for high-level nuclear waste storage. To better understand how resident microbial communities of the deep terrestrial biosphere may act on mineralogical and geochemical characteristics of insulating clays, we analyzed their structure and potential metabolic functions, as well as site-specific mineralogy and element composition from the dedicated Mont Terri underground research laboratory, Switzerland. We found that the Opalinus Clay formation is mainly colonized by Alphaproteobacteria, Firmicutes, and Bacteroidota, which are known for corrosive biofilm formation. Potential iron-reducing bacteria were predominant in comparison to methanogenic archaea and sulfate-reducing bacteria. Despite microbial communities in Opalinus Clay being in majority homogenous, site-specific mineralogy and geochemistry conditions have selected for subcommunities that display metabolic potential for mineral dissolution and transformation. Our findings indicate that the presence of a potentially low-active mineral-associated microbial community must be further studied to prevent effects on the repository's integrity over the long term.
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Affiliation(s)
- Julia Mitzscherling
- GFZ German Research Centre for Geosciences, Section GeomicrobiologyPotsdamGermany
| | - Steffi Genderjahn
- GFZ German Research Centre for Geosciences, Section GeomicrobiologyPotsdamGermany
| | - Anja M. Schleicher
- GFZ German Research Centre for Geosciences, Section Inorganic and Isotope GeochemistryPotsdamGermany
| | | | - Jens Kallmeyer
- GFZ German Research Centre for Geosciences, Section GeomicrobiologyPotsdamGermany
| | - Dirk Wagner
- GFZ German Research Centre for Geosciences, Section GeomicrobiologyPotsdamGermany
- Institute of GeosciencesUniversity of PotsdamPotsdamGermany
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3
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Guo H, Zhong R, Liu B, Yang J, Liu Z, Du C, Li X. Characteristic and Mechanistic Investigation of Stress-Assisted Microbiologically Influenced Corrosion of X80 Steel in Near-Neutral Solutions. MATERIALS (BASEL, SWITZERLAND) 2022; 16:390. [PMID: 36614728 PMCID: PMC9822082 DOI: 10.3390/ma16010390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Revised: 12/19/2022] [Accepted: 12/26/2022] [Indexed: 06/17/2023]
Abstract
The behavior and mechanisms of the stress-assisted microbiologically influenced corrosion (MIC) of X80 pipeline steel induced by sulfate-reducing bacteria (SRB) were investigated using focused ion beam-scanning electron microscopy (FIB). Electrochemical results show that SRB and stress have a synergistic effect on the corrosion of X80 steel. SRB accelerated the transformation of Fe3O4 into iron-sulfur compounds and may have caused the film breakage of X80 steel products. The obtained FIB results provide direct evidence that SRB promotes the corrosion of X80 steel.
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Affiliation(s)
- Huihua Guo
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China
| | - Rui Zhong
- Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China
| | - Bo Liu
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China
| | - Jike Yang
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China
| | - Zhiyong Liu
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China
- National Materials Corrosion and Protection Data Center, Beijing 100083, China
| | - Cuiwei Du
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China
- National Materials Corrosion and Protection Data Center, Beijing 100083, China
- Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Xiaogang Li
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China
- National Materials Corrosion and Protection Data Center, Beijing 100083, China
- Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China
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Wang Z, Li Y, Ren J, Xu W, Yang L. Investigating the effects of environment, corrosion degree, and distribution of corrosive microbial communities on service-life of refined oil pipelines. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:52204-52219. [PMID: 35260983 DOI: 10.1007/s11356-022-19556-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Accepted: 02/28/2022] [Indexed: 06/14/2023]
Abstract
Although the potential corrosive microbial communities of the refined oil pipelines can cause pipeline failure which directly threatens on soil and water environment, few studies have been published in this field. Therefore, the long-distance on-site internal corrosion detection and high-throughput sequencing techniques were employed in this study to investigate the distribution shifts of the corrosive microbial communities on the inner wall of a refined oil pipeline and its impact on the internal corrosion. The microorganisms colonizing on the inner wall of the pipeline showed significant distribution differences between the axial direction of the relative elevation and radial direction of the cross-section. On the inner wall, the high diversity and the abundance of the corrosive microbial communities induced serious microbiologically influenced corrosion (MIC), while the chemical corrosion and the synergy of the corrosive microbial communities accelerated the internal corrosion of the refined oil pipeline. A corrosion zone model has been proposed, which divides the pipeline cross-section into the sediment, the water-oil interface, the gas-oil interface, and the oil fully immersed zones. Therefore, the relationships between the environment, corrosion degree, and distribution characteristics of the corrosive microbial communities in the pipeline were analyzed. This research exhibited the importance of the distribution characteristics of the corrosive microorganisms on the inner wall of the refined oil pipelines. Its internal corrosion behavior was accurately explored, while providing a basis for controlling the corrosive microbial communities.
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Affiliation(s)
- Zhengquan Wang
- CAS Key Laboratory of Marine Environmental Corrosion and Bio-Fouling, Institute of Oceanology, Chinese Academy of Science, Qingdao, 266071, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
- Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, 266071, China
- Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237, China
| | - Yantao Li
- CAS Key Laboratory of Marine Environmental Corrosion and Bio-Fouling, Institute of Oceanology, Chinese Academy of Science, Qingdao, 266071, China.
- Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, 266071, China.
- Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237, China.
| | - Jie Ren
- CAS Key Laboratory of Marine Environmental Corrosion and Bio-Fouling, Institute of Oceanology, Chinese Academy of Science, Qingdao, 266071, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
- Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, 266071, China
- Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237, China
| | - Weichen Xu
- CAS Key Laboratory of Marine Environmental Corrosion and Bio-Fouling, Institute of Oceanology, Chinese Academy of Science, Qingdao, 266071, China
- Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, 266071, China
- Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237, China
| | - Lihui Yang
- CAS Key Laboratory of Marine Environmental Corrosion and Bio-Fouling, Institute of Oceanology, Chinese Academy of Science, Qingdao, 266071, China
- Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, 266071, China
- Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237, China
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Abstract
Marine biofilms are ubiquitous in the marine environment. These complex microbial communities rapidly respond to environmental changes and encompass hugely diverse microbial structures, functions and metabolisms. Nevertheless, knowledge is limited on the microbial community structures and functions of natural marine biofilms and their influence on global geochemical cycles. Microbial cues, including secondary metabolites and microbial structures, regulate interactions between microorganisms, with their environment and with other benthic organisms, which affects their community succession and metamorphosis. Furthermore, marine biofilms are key mediators of marine biofouling, which greatly affect marine industries. In this Review, we discuss marine biofilm dynamics, including their diversity, abundance and functions. We also highlight knowledge gaps, areas for future research and potential biotechnological applications of marine biofilms.
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Ueki T, Lovley DR. Desulfovibrio vulgaris as a model microbe for the study of corrosion under sulfate-reducing conditions. MLIFE 2022; 1:13-20. [PMID: 38818327 PMCID: PMC10989807 DOI: 10.1002/mlf2.12018] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 03/05/2022] [Accepted: 03/07/2022] [Indexed: 06/01/2024]
Abstract
Corrosion of iron-containing metals under sulfate-reducing conditions is an economically important problem. Microbial strains now known as Desulfovibrio vulgaris served as the model microbes in many of the foundational studies that developed existing models for the corrosion of iron-containing metals under sulfate-reducing conditions. Proposed mechanisms for corrosion by D. vulgaris include: (1) H2 consumption to accelerate the oxidation of Fe0 coupled to the reduction of protons to H2; (2) production of sulfide that combines with ferrous iron to form iron sulfide coatings that promote H2 production; (3) moribund cells release hydrogenases that catalyze Fe0 oxidation with the production of H2; (4) direct electron transfer from Fe0 to cells; and (5) flavins serving as an electron shuttle for electron transfer between Fe0 and cells. The demonstrated possibility of conducting transcriptomic and proteomic analysis of cells growing on metal surfaces suggests that similar studies on D. vulgaris corrosion biofilms can aid in identifying proteins that play an important role in corrosion. Tools for making targeted gene deletions in D. vulgaris are available for functional genetic studies. These approaches, coupled with instrumentation for the detection of low concentrations of H2, and proven techniques for evaluating putative electron shuttle function, are expected to make it possible to determine which of the proposed mechanisms for D. vulgaris corrosion are most important.
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Affiliation(s)
- Toshiyuki Ueki
- Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, Electrobiomaterials InstituteNortheastern UniversityShenyangChina
| | - Derek R. Lovley
- Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, Electrobiomaterials InstituteNortheastern UniversityShenyangChina
- Department of Microbiology University of MassachusettsAmherstMAUSA
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de Souza LC, Procópio L. The adaptations of the microbial communities of the savanna soil over a period of wildfire, after the first rains, and during the rainy season. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:14070-14082. [PMID: 34601674 DOI: 10.1007/s11356-021-16731-z] [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: 04/09/2021] [Accepted: 09/22/2021] [Indexed: 06/13/2023]
Abstract
Annually, the Cerrado ecosystem alternates between dry periods and long rainy seasons. During the dry season, severe forest fires occur, consuming a considerable part of the native vegetation, which impacts directly on the microbiome of the soil. Evaluate the adaptations of the soil microbiome to drought, rain and wildfire. Sequencing of the 16S rRNA gene was carried out for three significant conditions: drought and forest fires ("Fire"), after the first recorded rains ("First_Rain"), and during the rainy season ("Rainy"). It has been shown that under the "Fire" condition, there was a predominance of Phylum Actinobacteria, followed by Proteobacteria and Firmicutes. With the advent of the rainy season, "First_Rain," there was a change in the predominant taxonomic groups, with a higher prevalence of members of Proteobacteria and Firmicutes. During the rainy season, Proteobacteria and Firmicutes continued as the most prevalent groups. However, it was noted that in this period, there was an increase in bacterial diversity when compared with other periods analyzed. These results show how environmental factors influence adaptations in microbial communities. This allows for a better understanding of how to link the structure of the microbial community to the performance of ecosystems, and assist in preventing the consequences of increased frequency of wildfires, and long periods of drought.
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Affiliation(s)
- Lucas Conceição de Souza
- Faculty of Geosciences (FAGEO), Universidade Federal do Mato Grosso (UFMT), Cuiabá, Mato Grosso, Brazil
| | - Luciano Procópio
- Industrial Microbiology and Bioremediation Department, Universidade Federal do Rio de Janeiro (UFRJ), Caxias, Rio de Janeiro, Brazil.
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Bacteriome composition analysis of selected mineral water occurrences in Serbia. ARCH BIOL SCI 2022. [DOI: 10.2298/abs211223005s] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Bacterial metabarcoding analysis by 16S rDNA of five occurrences of mineral
waters in Serbia (Torda, Slankamen Banja, Lomnicki Kiseljak, Velika Vrbnica
and Obrenovacka Banja) indicated the presence of a high percentage of the
Proteobacteria phylum, followed by the Bacteroidetes phylum. The families
Rhodobacteraceae, Burkholderiaceae, Pseudomonadaceae, Methylophilaceae and
Moraxellaceae were the most dominant in the bacterial flora of the selected
occurrences, whereas the most represented genera were Acinetobacter,
Pseudorhodobacter, Pseudomonas, Limnohabitans, Massilia, Limnobacter and
Methylotenera. The presence of coliform bacteria was not detected. Alpha
diversity analysis revealed that Slankamen Banja and Lomnicki Kiseljak were
the richest of the selected occurrences, while the mineral waters of Torda,
Velika Vrbnica and Obrenovacka Banja were characterized by similar diversity
of bacterial communities determined by beta diversity analysis.
Physical-chemical analysis revealed the value of total dissolved solids
above 1 g/L, as well as elevated concentrations of some metals and
non-metals. The research concluded that specific bacteria contribute to the
development of biocorrosion and biofouling processes of water intake
facilities. In addition, some of these bacteria might be potential
indicators of the organic sources of pollution and/or biotechnological
natural remediators in the treatment of contaminated waters.
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The influence of the marine Bacillus cereus over carbon steel, stainless corrosion, and copper coupons. Arch Microbiol 2021; 204:9. [PMID: 34873663 DOI: 10.1007/s00203-021-02607-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 11/22/2021] [Accepted: 11/23/2021] [Indexed: 10/19/2022]
Abstract
The present study evaluated the influence of the marine bacteria Bacillus cereus Mc-1 on the corrosion of 1020 carbon steel, 316L stainless steel, and copper alloy. The Mc-1 strain was grown in a modified ammoniacal citrate culture medium (CFA.ico-), CFA.ico- with sodium nitrate supplementation (NO3-), and CFA.ico- with sodium chloride supplementation (NaCl). The mass loss and corrosion rate were evaluated after the periods of 7, 15, and 30 days. The results showed that in CFA.ico- and CFA.ico- medium added NO3- the corrosion rates of carbon steel and copper alloy were high when compared to the control. Whereas the medium was supplemented with NaCl, despite the rates being above the averages of the control system, they were considerably below the previous results. In general, the corrosion rates induced by Mc-1 on 316L coupons were below the results compared to carbon steel and copper alloy. When analyzing the corrosion rate measurements, regardless of the culture medium, the corrosion levels decreased consistently after 15 days, being below the levels evaluated after 7 days of the experiment. Our analyses suggest that B. cereus Mc-1 has different influences on corrosion in different metals and environmental conditions, such as the presence of NO3- and NaCl. These results can help to better understand the influence of this bacteria genus on the corrosion of metals in marine environments.
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Stainless steel corrosion via direct iron-to-microbe electron transfer by Geobacter species. THE ISME JOURNAL 2021; 15:3084-3093. [PMID: 33972726 PMCID: PMC8443633 DOI: 10.1038/s41396-021-00990-2] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 03/28/2021] [Accepted: 04/14/2021] [Indexed: 02/01/2023]
Abstract
Microbial corrosion of iron-based materials is a substantial economic problem. A mechanistic understanding is required to develop mitigation strategies, but previous mechanistic studies have been limited to investigations with relatively pure Fe(0), which is not a common structural material. We report here that the mechanism for microbial corrosion of stainless steel, the metal of choice for many actual applications, can be significantly different from that for Fe(0). Although H2 is often an intermediary electron carrier between the metal and microbes during Fe(0) corrosion, we found that H2 is not abiotically produced from stainless steel, making this corrosion mechanism unlikely. Geobacter sulfurreducens and Geobacter metallireducens, electrotrophs that are known to directly accept electrons from other microbes or electrodes, extracted electrons from stainless steel via direct iron-to-microbe electron transfer. Genetic modification to prevent H2 consumption did not negatively impact on stainless steel corrosion. Corrosion was inhibited when genes for outer-surface cytochromes that are key electrical contacts were deleted. These results indicate that a common model of microbial Fe(0) corrosion by hydrogenase-positive microbes, in which H2 serves as an intermediary electron carrier between the metal surface and the microbe, may not apply to the microbial corrosion of stainless steel. However, direct iron-to-microbe electron transfer is a feasible route for stainless steel corrosion.
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de Souza LC, Procópio L. The profile of the soil microbiota in the Cerrado is influenced by land use. Appl Microbiol Biotechnol 2021; 105:4791-4803. [PMID: 34061229 DOI: 10.1007/s00253-021-11377-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 05/12/2021] [Accepted: 05/27/2021] [Indexed: 02/03/2023]
Abstract
Extensive areas of the Cerrado biome have been deforested by the rapid advance of agricultural frontiers, especially by agricultural monocultures, and cultivated pastures. The objective of this study was to characterize the soil microbial community of an environment without anthropogenic interference and to compare it with soybean soil and pasture areas. For that, metagenomic sequencing techniques of the 16S rRNA gene were employed. Consistent changes in the profiles of diversity and abundance were described between communities in relation to the type of soil. The soil microbiome of the native environment was influenced by the pH level and content of Al3+, whereas the soil microbiomes cultivated with soybean and pasture were associated with the levels of nutrients N and P and the ions Ca2+ and Mg2+, respectively. The analysis of bacterial communities in the soil of the native environment showed a high abundance of members of the Proteobacteria phylum, with emphasis on the Bradyrhizobium and Burkholderia genera. In addition, significant levels of species of the Bacillus genus, and Dyella ginsengisoli, and Edaphobacter aggregans of the Acidobacteria phylum were detected. In the soil community with soybean cultivation, there was a predominance of Proteobacteria, mainly of the Sphingobium and Sphingomonas genera. In the pasture, the soil microbiota was dominated by the Firmicutes, which was almost entirely represented by the Bacillus genus. These results suggest an adaptation of the bacterial community to the soybean and pasture cultivations and will support understanding how environmental and anthropogenic factors shape the soil microbial community. KEY POINTS: • The Cerrado soil microbiota is sensitive to impacts on the biome. • Microbial communities have been altered at all taxonomic levels.
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Affiliation(s)
- Lucas Conceição de Souza
- Faculty of Geosciences (FAGEO), Universidade Federal do Mato Grosso (UFMT), Cuiabá, Mato Grosso, Brazil.
| | - Luciano Procópio
- Industrial Microbiology and Bioremediation Department, Universidade Federal do Rio de Janeiro (UFRJ), Caxias, Rio de Janeiro, Brazil
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Procópio L. The oil spill and the use of chemical surfactant reduce microbial corrosion on API 5L steel buried in saline soil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:26975-26989. [PMID: 33496949 DOI: 10.1007/s11356-021-12544-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 01/14/2021] [Indexed: 06/12/2023]
Abstract
In order to evaluate the biocorrosion of API 5L metal buried in saline soils, three different conditions in microcosms were evaluated. The control microcosm contained only saline soil, the second had the addition of petroleum, and the third contained the addition of both petroleum and surfactant. The corrosion rate of the metals was measured by loss of mass after 30 days, and the microbial communities were delineated using 16S rRNA gene sequencing techniques. The species were dominated by halophiles in all samples analyzed. Among the bacteria, the predominant group was Proteobacteria, with emphasis on the Alphaproteobacteria and Gammaproteobacteria. Betaproteobacteria and Deltaproteobacteria members were also identified in a smaller number in all conditions. Firmicutes were especially abundant in the control system, although it was persistently present in other conditions evaluated. Bacteroidetes and Actinobacteria were also present in a considerable number of OTUs in the three microcosms. Halobacteria were predominant among archaea and were present in all conditions. The analysis pointed to a conclusion that in the control microcosm, the corrosion rate was higher, while the microcosm containing only oil had the lowest corrosion rate. These results suggest that, under these conditions, the entry of other carbon sources favors the presence of petroleum degraders, rather than samples involved in the corrosion of metals.
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Affiliation(s)
- Luciano Procópio
- Industrial Microbiology and Bioremediation Department, Universidade Federal do Rio de Janeiro (UFRJ), Caxias, Rio de Janeiro, Brazil.
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Microbial corrosion of DSS 2205 in an acidic chloride environment under continuous flow. PLoS One 2021; 16:e0251524. [PMID: 33979409 PMCID: PMC8115847 DOI: 10.1371/journal.pone.0251524] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 04/28/2021] [Indexed: 11/19/2022] Open
Abstract
Corrosion under flow conditions is a major problem in the transportation industry. Various studies have shown the direct impact of different flow rates on bacteria biofilm formation, mass transfer and resulting different corrosion behaviour of materials in neutral environments. However, little is understood on corrosion under acidic flow conditions. This study investigated the impact of an acidic artificial seawater environment containing Desulfovibrio vulgaris on DSS 2205 microbial corrosion under different velocities (0.25 m.s-1 and 0.61 m.s-1). Experiments containing no bacteria were performed as controls. Bacterial attachment was observed by optical and scanning electron microscope (SEM). Materials corrosion was assessed using open circuit potential (OCP), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization. Pits formed after potentiodynamic test were observed under SEM. The largest area of bacterial attachment was found on coupons immersed at a velocity of 0.25 m.s-1; however, the corrosion rate was lower than at higher velocity. Shallow pits occurred in the metal coupons when bacteria were present, while deep pits occurred in the controls. The study indicates the positive impact of biofilm formation in corrosion prevention of materials under acidic condition. The nature of corrosion behaviour of duplex stainless is discussed.
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Compost Samples from Different Temperature Zones as a Model to Study Co-occurrence of Thermophilic and Psychrophilic Bacterial Population: a Metagenomics Approach. Curr Microbiol 2021; 78:1903-1913. [PMID: 33786643 DOI: 10.1007/s00284-021-02456-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Accepted: 03/10/2021] [Indexed: 10/21/2022]
Abstract
In this study, using a metagenomic approach, we explore the bacterial diversity of compost sites categorized based on their ambient temperatures. The two sites were Reckong Peo in the lower Himalayas and Tambaram in the southern region of the country, namely, CPR and CT. Following assembly of the raw reads from shotgun metagenomics, similarity hits were generated using NCBI BLAST + and SILVA database. A total of 1463 and 1483 species were annotated from CPR and CT. A species-level annotation was performed using a python-based literature search pipeline revealing their growth characteristics. Thermophiles Thermomonospora curvata and Thermus scotoductus were among the prominent species in CT. CPR too was seen abundant with Acidothermus cellulolyticus and Moorella thermoacetica, constituting 10% of the population. Nearly 3% of the identified species in the site CPR were psychrophilic. Although found higher in CPR, psychrophilic species were identified in CT too. Flavobacterium and Psychrobacter spp. were present in both sites without any significant changes in their relative distribution contrary to the thermophilic species abundance (z = - 4.3). Akin to the sequenced samples, database-derived metagenomes also showed similar distribution of thermophiles and psychrophiles. Identifying such peculiar prevalence of extremophiles can be central to understanding extended growth temperatures.
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Lamim VB, Procópio L. Influence of Acidification and Warming of Seawater on Biofouling by Bacteria Grown over API 5L Steel. Indian J Microbiol 2021; 61:151-159. [PMID: 33927456 DOI: 10.1007/s12088-021-00925-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 02/08/2021] [Indexed: 12/20/2022] Open
Abstract
The acidification and warming of seawater have several impacts on marine organisms, including over microorganisms. The influence of acidification and warming of seawater on biofilms grown on API 5L steel surfaces was evaluated by sequencing the 16S ribosomal gene. For this, three microcosms were designed, the first simulating the natural marine environment (MCC), the second with a decrease in pH from 8.1 to 7.9, and an increase in temperature by 2 °C (MMS), and the third with pH in around 7.7 and an increase in temperature of 4 °C (MES). The results showed that MCC was dominated by the Gammaproteobacteria class, mainly members of the Alteromonadales Order. The second most abundant group was Alphaproteobacteria, with a predominance of Rhodobacterales and Oceanospirillales. In the MMS system there was a balance between representatives of the Gammaproteobacteria and Alphaproteobacteria classes. In MES there was an inversion in the representations of the most prevalent classes previously described in MCC. In this condition, there was a predominance of members of the Alphaproteobacteria Class, in contrast to the decrease in the abundance of Gammaproteobacteria members. These results suggest that possible future climate changes may influence the dynamics of the biofouling process in surface metals. Supplementary Information The online version contains supplementary material available at 10.1007/s12088-021-00925-7.
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Affiliation(s)
- Victória Brigido Lamim
- Microbial Corrosion Laboratory, Estácio University (UNESA), Bispo Street, 83, Room, AG405, Rio de Janeiro, Rio de Janeiro 20261-063 Brazil
| | - Luciano Procópio
- Microbial Corrosion Laboratory, Estácio University (UNESA), Bispo Street, 83, Room, AG405, Rio de Janeiro, Rio de Janeiro 20261-063 Brazil
- Industrial Microbiology and Bioremediation Department, Federal University of Rio de Janeiro (UFRJ), Estrada de Xerém, 27, Duque de Caxias, Rio de Janeiro Brazil
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Capão A, Moreira-Filho P, Garcia M, Bitati S, Procópio L. Marine bacterial community analysis on 316L stainless steel coupons by Illumina MiSeq sequencing. Biotechnol Lett 2020; 42:1431-1448. [PMID: 32472186 DOI: 10.1007/s10529-020-02927-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Accepted: 05/26/2020] [Indexed: 11/30/2022]
Abstract
In order to evaluate the corrosive action of microorganisms on 316L metal exposed directly to a marine environment, a system was designed to immerse coupons in seawater. After periods of 30, 60 and 90 days, the coupons were recovered, the corrosion rates evaluated and the biofilm samples on their surface were analyzed by 16S rRNA gene sequencing. The results of the corrosion rate showed an acceleration over the entire experimental period. Alpha diversity measurements showed higher rates after 60 days of the experiment, while abundance measurements showed higher rates after 90 days of exposure to the marine environment. The beta-diversity results showed a clear separation between the three conditions and proximity in the indices between replicates of the same experimental condition. The results of 16S rRNA gene sequencing showed that after 30 days of exposure to seawater, there was massive representativeness of the pioneer bacteria, Gamma and Alphaproteobacteria, with emphasis on the genera Alcanivorax, Oceanospirillum and Shewanella. At the 60-day analysis, the Gammaproteobacteria class remained dominant, followed by Alphaproteobacteria and Flavobacteria, and the main representatives were Flexibacter and Pseudoalteromonas. In the last analysis, after 90 days, a change in the described bacterial community profile was observed. The Gammaproteobacteria class was still the largest in diversity and OTUs. The most predominant genera in number of OTUs were Alteromonas, Bacteriovorax and, Nautella. Our results describe a change in the microbial community over coupons directly exposed to the marine environment, suggesting a redirection to the formation of a mature biofilm. The conditions created by the biofilm structure suggest said condition favor biocorrosion on the analyzed coupons.
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Affiliation(s)
- Artur Capão
- Microbial Corrosion Laboratory, Estácio University (UNESA), Bispo Street, 83, Room, AG405, Rio de Janeiro, Rio de Janeiro, ZIP Code 20261-063, Brazil
| | - Paulo Moreira-Filho
- Microbial Corrosion Laboratory, Estácio University (UNESA), Bispo Street, 83, Room, AG405, Rio de Janeiro, Rio de Janeiro, ZIP Code 20261-063, Brazil
| | - Maurício Garcia
- Microbial Corrosion Laboratory, Estácio University (UNESA), Bispo Street, 83, Room, AG405, Rio de Janeiro, Rio de Janeiro, ZIP Code 20261-063, Brazil
| | - Suleima Bitati
- Microbial Corrosion Laboratory, Estácio University (UNESA), Bispo Street, 83, Room, AG405, Rio de Janeiro, Rio de Janeiro, ZIP Code 20261-063, Brazil
| | - Luciano Procópio
- Microbial Corrosion Laboratory, Estácio University (UNESA), Bispo Street, 83, Room, AG405, Rio de Janeiro, Rio de Janeiro, ZIP Code 20261-063, Brazil. .,Industrial Microbiology and Bioremediation Department, Federal University of Rio de Janeiro (UFRJ), Caxias, Rio de Janeiro, Brazil.
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Changes in microbial community in the presence of oil and chemical dispersant and their effects on the corrosion of API 5L steel coupons in a marine-simulated microcosm. Appl Microbiol Biotechnol 2020; 104:6397-6411. [PMID: 32458139 DOI: 10.1007/s00253-020-10688-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 05/06/2020] [Accepted: 05/17/2020] [Indexed: 02/02/2023]
Abstract
The influence of crude oil and chemical dispersant was evaluated over planktonic bacteria and biofilms grown on API 5L steel surfaces in microcosm systems. Three conditions were simulated, an untreated marine environment and a marine environment with the presence of crude oil and a containing crude oil and chemical dispersant. The results of coupon corrosion rates indicated that in the oil microcosm, there was a high corrosion rate when compared with the other two systems. Analysis of bacterial communities by 16S rRNA gene sequencing described a clear difference between the different treatments. In plankton communities, the Bacilli and Gammaproteobacteria classes were the most present in numbers of operational taxonomic unit (OTUs). The Vibrionales, Oceanospirillales, and Alteromonadales orders were predominant in the treatment with crude oil, whereas in the microcosm containing oil and chemical dispersant, mainly members of Bacillales order were detected. In the communities analyzed from biofilms attached to the coupons, the most preponderant class was Alphaproteobacteria, followed by Gammaproteobacteria. In the control microcosm, there was a prevalence of the orders Rhodobacterales, Aeromonadales, and Alteromonadales, whereas in the dispersed oil and oil systems, the members of the order Rhodobacterales were present in a larger number of OTUs. These results demonstrate how the presence of a chemical dispersant and oil influence the corrosion rate and bacterial community structures present in the water column and biofilms grown on API 5L steel surfaces in a marine environment. KEY POINTS: • Evaluation of the effects of oil and chemical surfactants on the corrosion of API 5L. • Changes in microbial communities do not present corrosive biofilm on API 5L coupons.
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Distinct Profiles in Microbial Diversity on Carbon Steel and Different Welds in Simulated Marine Microcosm. Curr Microbiol 2020; 77:967-978. [PMID: 31993700 DOI: 10.1007/s00284-020-01898-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 01/20/2020] [Indexed: 01/23/2023]
Abstract
The main studies on the corrosion of metals induced by microorganisms are directed only to the surface of the metal, without considering the presence of welds between these surfaces. For this reason, we evaluated the difference of microbial community grown in carbon steel coupons, and two different types of welds, E7018 and Tungsten electrodes, exposed under simulated microcosm. After 30 days, they were recovered, the biofilms scraped and the microbial communities analyzed by 16S rRNA gene sequencing. The results showed that there was a differentiated distribution among the three samples collected. Proteobacteria phylum composed most of the species described in all samples. At the class level, Gammaproteobacteria was the most detected, followed by Alphaproteobacteria and Flavobacteriia. The most prevalent order was Alteromonadales, which was present in Weld2, followed by Rhodobacteriales, which was more prevalent in Fe1020 and Weld1. The orders Cytophagales, Sphingomonadales, and Burkholderiales were described in higher number in Fe1020, whereas Oceanospirillales, Thiotrichales, Flavobacteriales, Rhodospirillales, and Kordiimonadales were higher in samples Weld1 and Weld2. The analyses between the three evaluated conditions show the presences of bacterial groups preferred by different types of metal, suggesting that approaches in the control of biocorrosion should take into account the chemical composition of the metal.
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