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Li S, Wang S, Ji G. Influences of carbon sources on N 2O production during denitrification in freshwaters: Activity, isotopes and functional microbes. WATER RESEARCH 2022; 226:119315. [PMID: 36369690 DOI: 10.1016/j.watres.2022.119315] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Revised: 08/15/2022] [Accepted: 10/29/2022] [Indexed: 06/16/2023]
Abstract
Denitrification is one of the major sources of N2O in freshwaters. Diverse forms of organic compounds act as the electron donors for microbial denitrification. However, the influences of carbon sources on N2O production, N2O reduction, isotope fractionation and functional microbes during denitrification were largely unknown. In this study, five forms of carbon sources (i.e. acetate, citrate, glucose, cellobiose and leucine) were used to enrich denitrifiers in freshwater sediments. N2O conversion in the enrichments was investigated by a combination of inhibition technique, natural stable isotope method and metagenomics. Acetylene was effective in inhibiting N2O reduction without influencing the isotopic characteristics during N2O production. Glucose led to the least N2O production and reduction, in accordance with the lowest abundance of both NO and N2O reductases in this enrichment. δ18O and site preference value (SP, =δ15Nα-δ15Nβ) of N2O were sensitive to discriminate the five carbon sources, except when comparing acetate and leucine. Isotopic values of N2O were not significantly different in these two enrichments due to the similarity of NO reductases - Pseudomonas-type cNorB. Specifically, the enrichment with cellobiose produced N2O with the lowest δ18O values (39.4‰±1.1‰), due to Alicycliphilus with both cNorB and qNorB. The enrichment with glucose led to the highest SP values (8.9‰±8.6‰), caused by Thiobacillus-type cNorB. Our results demonstrated the link between carbon sources, N2O production and reduction, isotopic signatures, microbial populations and enzymes during denitrification in freshwaters.
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Affiliation(s)
- Shengjie Li
- Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China
| | - Shuo Wang
- Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China
| | - Guodong Ji
- Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China.
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2
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Affiliation(s)
- J. Gijs Kuenen
- Environmental Biotechnology Section, Department of BiotechnologyDelft University of Technology The Netherlands
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3
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Griffin S, Masood MI, Nasim MJ, Sarfraz M, Ebokaiwe AP, Schäfer KH, Keck CM, Jacob C. Natural Nanoparticles: A Particular Matter Inspired by Nature. Antioxidants (Basel) 2017; 7:antiox7010003. [PMID: 29286304 PMCID: PMC5789313 DOI: 10.3390/antiox7010003] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 12/20/2017] [Accepted: 12/22/2017] [Indexed: 02/06/2023] Open
Abstract
During the last couple of decades, the rapidly advancing field of nanotechnology has produced a wide palette of nanomaterials, most of which are considered as “synthetic” and, among the wider public, are often met with a certain suspicion. Despite the technological sophistication behind many of these materials, “nano” does not always equate with “artificial”. Indeed, nature itself is an excellent nanotechnologist. It provides us with a range of fine particles, from inorganic ash, soot, sulfur and mineral particles found in the air or in wells, to sulfur and selenium nanoparticles produced by many bacteria and yeasts. These nanomaterials are entirely natural, and, not surprisingly, there is a growing interest in the development of natural nanoproducts, for instance in the emerging fields of phyto- and phyco-nanotechnology. This review will highlight some of the most recent—and sometimes unexpected—advances in this exciting and diverse field of research and development. Naturally occurring nanomaterials, artificially produced nanomaterials of natural products as well as naturally occurring or produced nanomaterials of natural products all show their own, particular chemical and physical properties, biological activities and promise for applications, especially in the fields of medicine, nutrition, cosmetics and agriculture. In the future, such natural nanoparticles will not only stimulate research and add a greener outlook to a traditionally high-tech field, they will also provide solutions—pardon—suspensions for a range of problems. Here, we may anticipate specific biogenic factories, valuable new materials based on waste, the effective removal of contaminants as part of nano-bioremediation, and the conversion of poorly soluble substances and materials to biologically available forms for practical uses.
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Affiliation(s)
- Sharoon Griffin
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbruecken, Germany.
- Institute of Pharmaceutics and Biopharmaceutics, Philipps University of Marburg, 35037 Marburg, Germany.
| | - Muhammad Irfan Masood
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbruecken, Germany.
- Department of Biotechnology, University of Applied Sciences Kaiserslautern, 66482 Zweibruecken, Germany.
| | - Muhammad Jawad Nasim
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbruecken, Germany.
| | - Muhammad Sarfraz
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbruecken, Germany.
| | - Azubuike Peter Ebokaiwe
- Department of Chemistry/Biochemistry and Molecular Biology, Federal University, Ndufu-Alike Ikwo, 482131 Ndufu-Alike, Nigeria.
| | - Karl-Herbert Schäfer
- Department of Biotechnology, University of Applied Sciences Kaiserslautern, 66482 Zweibruecken, Germany.
| | - Cornelia M Keck
- Institute of Pharmaceutics and Biopharmaceutics, Philipps University of Marburg, 35037 Marburg, Germany.
| | - Claus Jacob
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbruecken, Germany.
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4
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Houghton JL, Foustoukos DI, Flynn TM, Vetriani C, Bradley AS, Fike DA. Thiosulfate oxidation by Thiomicrospira thermophila: metabolic flexibility in response to ambient geochemistry. Environ Microbiol 2016; 18:3057-72. [PMID: 26914243 DOI: 10.1111/1462-2920.13232] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Accepted: 01/17/2016] [Indexed: 11/29/2022]
Abstract
Previous studies of the stoichiometry of thiosulfate oxidation by colorless sulfur bacteria have failed to demonstrate mass balance of sulfur, indicating that unidentified oxidized products must be present. Here the reaction stoichiometry and kinetics under variable pH conditions during the growth of Thiomicrospira thermophila strain EPR85, isolated from diffuse hydrothermal fluids at the East Pacific Rise, is presented. At pH 8.0, thiosulfate was stoichiometrically converted to sulfate. At lower pH, the products of thiosulfate oxidation were extracellular elemental sulfur and sulfate. We were able to replicate previous experiments and identify the missing sulfur as tetrathionate, consistent with previous reports of the activity of thiosulfate dehydrogenase. Tetrathionate was formed under slightly acidic conditions. Genomic DNA from T. thermophila strain EPR85 contains genes homologous to those in the Sox pathway (soxAXYZBCDL), as well as rhodanese and thiosulfate dehydrogenase. No other sulfur oxidizing bacteria containing sox(CD)2 genes have been reported to produce extracellular elemental sulfur. If the apparent modified Sox pathway we observed in T. thermophila is present in marine Thiobacillus and Thiomicrospira species, production of extracellular elemental sulfur may be biogeochemically important in marine sulfur cycling.
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Affiliation(s)
- J L Houghton
- Department of Earth and Planetary Sciences, Washington University, St. Louis, MO, 63130, USA.
| | - D I Foustoukos
- Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC, 20015, USA
| | - T M Flynn
- Biosciences Division, Argonne National Laboratory, Lemont, IL, 60439, USA.,Computation Institution, The University of Chicago, Chicago, IL, 60637, USA
| | - C Vetriani
- Department of Biochemistry and Microbiology and Institute of Earth, Ocean and Atmospheric Sciences, Rutgers University, New Brunswick, NJ, 08901, USA
| | - Alexander S Bradley
- Department of Earth and Planetary Sciences, Washington University, St. Louis, MO, 63130, USA
| | - D A Fike
- Department of Earth and Planetary Sciences, Washington University, St. Louis, MO, 63130, USA
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5
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González-Sánchez A, Arellano-García L, Bonilla-Blancas W, Baquerizo G, Hernández S, Gabriel D, Revah S. Kinetic Characterization by Respirometry of Volatile Organic Compound-Degrading Biofilms from Gas-Phase Biological Filters. Ind Eng Chem Res 2014. [DOI: 10.1021/ie503327f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Armando González-Sánchez
- Departamento
de Procesos y Tecnología, Universidad Autónoma Metropolitana Cuajimalpa, Mexico City, 05300, Mexico
- Instituto
de Ingeniería, Universidad Nacional Autónoma de México (UNAM), Circuito Escolar, Ciudad Universitaria, Mexico City, 04510, Mexico
| | - Luis Arellano-García
- Posgrado
en Ingeniería Química. Departamento de Ingeniería
de Procesos e Hidráulica, Universidad Autónoma Metropolitana Iztapalapa, Mexico City, 09340, Mexico
| | - Wenceslao Bonilla-Blancas
- Posgrado
en Ingeniería Química. Departamento de Ingeniería
de Procesos e Hidráulica, Universidad Autónoma Metropolitana Iztapalapa, Mexico City, 09340, Mexico
- Tecnológico de Estudios Superiores de Ecatepec, Av. Tecnológico S/N, Col. Valle Anáhuac, 55210, Ecatepec de Morelos, Mexico
| | - Guillermo Baquerizo
- Departamento
de Procesos y Tecnología, Universidad Autónoma Metropolitana Cuajimalpa, Mexico City, 05300, Mexico
- Irstea, UR MALY,
Epure, Centre de Lyon-Villeurbanne, F-69626 Villeurbanne, France
| | - Sergio Hernández
- Departamento
de Procesos y Tecnología, Universidad Autónoma Metropolitana Cuajimalpa, Mexico City, 05300, Mexico
| | - David Gabriel
- Departament
d’Enginyeria Química, Universitat Autònoma de Barcelona, Campus de Bellaterra, Barcelona, 08193, Spain
| | - Sergio Revah
- Departamento
de Procesos y Tecnología, Universidad Autónoma Metropolitana Cuajimalpa, Mexico City, 05300, Mexico
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6
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Mora M, Guisasola A, Gamisans X, Gabriel D. Examining thiosulfate-driven autotrophic denitrification through respirometry. CHEMOSPHERE 2014; 113:1-8. [PMID: 25065782 DOI: 10.1016/j.chemosphere.2014.03.083] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Revised: 03/25/2014] [Accepted: 03/26/2014] [Indexed: 06/03/2023]
Abstract
Anoxic respirometry was applied to characterize a sulfide-oxidizing nitrate-reducing (SO-NR) culture obtained from an anoxic biogas desulfurizing biotrickling filter treating high loads of H2S. Immobilized biomass extracted from the biotrickling filter was grown in a suspended culture with thiosulfate as electron donor to obtain the biomass growth yield and the S2O3(2)(-)/NO3(-) consumed ratio. Afterward, respirometry was applied to describe thiosulfate oxidation under anoxic conditions. A pure culture of Thiobacillus denitrificans was also used as a control culture in order to validate the procedure proposed in this work to characterize the SO-NR biomass. Respirometric profiles obtained with this microbial culture showed that nitrite was formed as intermediate during nitrate reduction and revealed that no competitive inhibition appeared when both electron acceptors were present in the medium. Although final bioreaction products depended on the initial S2O3(2)(-)/NO3(-) ratio, such ratio did not affect thiosulfate oxidation or denitrification rates. Moreover, respirometric profiles showed that the specific nitrite uptake rate depended on the biomass characteristics being that of a SO-NR mixed culture (39.8mgNg(-1) VSSh(-1)) higher than that obtained from a pure culture of T. denitrificans (19.7mgNg(-1) VSSh(-1)). For the first time, the stoichiometry of the two-step denitrification mechanism with thiosulfate oxidation and biomass growth associated was solved for both reactions.
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Affiliation(s)
- Mabel Mora
- Department of Chemical Engineering, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Albert Guisasola
- Department of Chemical Engineering, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Xavier Gamisans
- Department of Mining Engineering and Natural Resources, Universitat Politècnica de Catalunya, Bases de Manresa 61-73, 08240 Manresa, Spain
| | - David Gabriel
- Department of Chemical Engineering, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.
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7
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Solcia R, Ramírez M, Fernández M, Cantero D, Bevilaqua D. Hydrogen sulphide removal from air by biotrickling filter using open-pore polyurethane foam as a carrier. Biochem Eng J 2014. [DOI: 10.1016/j.bej.2013.12.019] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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8
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Klok JBM, van den Bosch PLF, Buisman CJN, Stams AJM, Keesman KJ, Janssen AJH. Pathways of sulfide oxidation by haloalkaliphilic bacteria in limited-oxygen gas lift bioreactors. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:7581-6. [PMID: 22697609 DOI: 10.1021/es301480z] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Physicochemical processes, such as the Lo-cat and Amine-Claus process, are commonly used to remove hydrogen sulfide from hydrocarbon gas streams such as landfill gas, natural gas, and synthesis gas. Biodesulfurization offers environmental advantages, but still requires optimization and more insight in the reaction pathways and kinetics. We carried out experiments with gas lift bioreactors inoculated with haloalkaliphilic sulfide-oxidizing bacteria. At oxygen-limiting levels, that is, below an O(2)/H(2)S mole ratio of 1, sulfide was oxidized to elemental sulfur and sulfate. We propose that the bacteria reduce NAD(+) without direct transfer of electrons to oxygen and that this is most likely the main route for oxidizing sulfide to elemental sulfur which is subsequently oxidized to sulfate in oxygen-limited bioreactors. We call this pathway the limited oxygen route (LOR). Biomass growth under these conditions is significantly lower than at higher oxygen levels. These findings emphasize the importance of accurate process control. This work also identifies a need for studies exploring similar pathways in other sulfide oxidizers such as Thiobacillus bacteria.
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Affiliation(s)
- Johannes B M Klok
- Systems and Control group, Wageningen University, Bornse Weilanden 9, P.O. Box 17, 6700 AA Wageningen, The Netherlands.
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9
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Geelhoed JS, Kleerebezem R, Sorokin DY, Stams AJM, van Loosdrecht MCM. Reduced inorganic sulfur oxidation supports autotrophic and mixotrophic growth of Magnetospirillum strain J10 and Magnetospirillum gryphiswaldense. Environ Microbiol 2010; 12:1031-40. [PMID: 20105221 DOI: 10.1111/j.1462-2920.2009.02148.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Magnetotactic bacteria are present at the oxic-anoxic transition zone where opposing gradients of oxygen and reduced sulfur and iron exist. Growth of non-magnetotactic lithoautotrophic Magnetospirillum strain J10 and its close relative magnetotactic Magnetospirillum gryphiswaldense was characterized in microaerobic continuous culture. Both strains were able to grow in mixotrophic (acetate + sulfide) and autotrophic (sulfide or thiosulfate) conditions. Autotrophically growing cells completely converted sulfide or thiosulfate to sulfate and produced 7.5 g dry weight per mol substrate at a maximum observed growth rate of 0.09 h(-1) for strain J10 and 0.07 h(-1) for M. gryphiswaldense. The respiratory activity for acetate was repressed in autotrophic and also in mixotrophic cultures, suggesting acetate was used as C-source in the latter. We have estimated the proportions of substrate used for assimilatory processes and evaluated the biomass yields per mol dissimilated substrate. The yield for lithoheterotrophic growth using acetate as the C-source was approximately twice the autotrophic growth yield and very similar to the heterotrophic yield, showing the importance of reduced sulfur compounds for growth. In the draft genome sequence of M. gryphiswaldense homologues of genes encoding a partial sulfur-oxidizing (Sox) enzyme system and reverse dissimilatory sulfite reductase (Dsr) were identified, which may be involved in the oxidation of sulfide and thiosulfate. Magnetospirillum gryphiswaldense is the first freshwater magnetotactic species for which autotrophic growth is shown.
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Affiliation(s)
- Jeanine S Geelhoed
- Environmental Biotechnology, Department of Biotechnology, Delft University of Technology, Julianalaan 67, 2628 BC Delft, the Netherlands.
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10
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Geelhoed JS, Sorokin DY, Epping E, Tourova TP, Banciu HL, Muyzer G, Stams AJM, van Loosdrecht MCM. Microbial sulfide oxidation in the oxic-anoxic transition zone of freshwater sediment: involvement of lithoautotrophic Magnetospirillum strain J10. FEMS Microbiol Ecol 2009; 70:54-65. [PMID: 19659746 DOI: 10.1111/j.1574-6941.2009.00739.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
The oxic-anoxic transition zone (OATZ) of freshwater sediments, where opposing gradients exist of reduced iron and sulfide with oxygen, creates a suitable environment for microorganisms that derive energy from the oxidation of iron or sulfide. Gradient microcosms incubated with freshwater sediment showed rapid microbial turnover of sulfide and oxygen compared with sterile systems. Microcosms with FeS as a substrate also showed growth at the OATZ and subsequent dilution series resulted in the isolation of three novel strains, of which strain J10 grows chemolithoautotrophically with reduced sulfur compounds under microaerobic conditions. All three strains are motile spirilla with bipolar flagella, related to the genera Magnetospirillum and Dechlorospirillum within the Alphaproteobacteria. Strain J10 is closely related to Magnetospirillum gryphiswaldense and is the first strain in this genus found to be capable of autotrophic growth. Thiosulfate was oxidized completely to sulfate, with a yield of 4 g protein mol(-1) thiosulfate, and autotrophic growth was evidenced by incorporation of (13)C derived from bicarbonate into biomass. A putative gene encoding ribulose 1,5-bisphosphate carboxylase/oxygenase type II was identified in strain J10, suggesting that the Calvin-Benson-Bassham cycle is used for autotrophic growth. Analogous genes are also present in other magnetospirilla, and in the autotrophically growing alphaproteobacterium magnetic vibrio MV-1.
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Affiliation(s)
- Jeanine S Geelhoed
- Department of Biotechnology, Environmental Biotechnology, Delft University of Technology, Delft, The Netherlands.
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11
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Bødtker G, Thorstenson T, Lillebø BLP, Thorbjørnsen BE, Ulvøen RH, Sunde E, Torsvik T. The effect of long-term nitrate treatment on SRB activity, corrosion rate and bacterial community composition in offshore water injection systems. J Ind Microbiol Biotechnol 2008; 35:1625-36. [DOI: 10.1007/s10295-008-0406-x] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2008] [Accepted: 07/23/2008] [Indexed: 11/30/2022]
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12
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Okabe S, Odagiri M, Ito T, Satoh H. Succession of sulfur-oxidizing bacteria in the microbial community on corroding concrete in sewer systems. Appl Environ Microbiol 2006; 73:971-80. [PMID: 17142362 PMCID: PMC1800771 DOI: 10.1128/aem.02054-06] [Citation(s) in RCA: 123] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Microbially induced concrete corrosion (MICC) in sewer systems has been a serious problem for a long time. A better understanding of the succession of microbial community members responsible for the production of sulfuric acid is essential for the efficient control of MICC. In this study, the succession of sulfur-oxidizing bacteria (SOB) in the bacterial community on corroding concrete in a sewer system in situ was investigated over 1 year by culture-independent 16S rRNA gene-based molecular techniques. Results revealed that at least six phylotypes of SOB species were involved in the MICC process, and the predominant SOB species shifted in the following order: Thiothrix sp., Thiobacillus plumbophilus, Thiomonas intermedia, Halothiobacillus neapolitanus, Acidiphilium acidophilum, and Acidithiobacillus thiooxidans. A. thiooxidans, a hyperacidophilic SOB, was the most dominant (accounting for 70% of EUB338-mixed probe-hybridized cells) in the heavily corroded concrete after 1 year. This succession of SOB species could be dependent on the pH of the concrete surface as well as on trophic properties (e.g., autotrophic or mixotrophic) and on the ability of the SOB to utilize different sulfur compounds (e.g., H2S, S0, and S2O3(2-)). In addition, diverse heterotrophic bacterial species (e.g., halo-tolerant, neutrophilic, and acidophilic bacteria) were associated with these SOB. The microbial succession of these microorganisms was involved in the colonization of the concrete and the production of sulfuric acid. Furthermore, the vertical distribution of microbial community members revealed that A. thiooxidans was the most dominant throughout the heavily corroded concrete (gypsum) layer and that A. thiooxidans was most abundant at the highest surface (1.5-mm) layer and decreased logarithmically with depth because of oxygen and H2S transport limitations. This suggested that the production of sulfuric acid by A. thiooxidans occurred mainly on the concrete surface and the sulfuric acid produced penetrated through the corroded concrete layer and reacted with the sound concrete below.
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Affiliation(s)
- Satoshi Okabe
- Department of Urban and Environmental Engineering, Graduate School of Engineering, Hokkaido University, North-13, West-8, Kita-ku, Sapporo 060-8628, Japan.
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13
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Qiu GL, Li YL, Zhao K. Thiobacillus thioparus immobilized by magnetic porous beads: Preparation and characteristic. Enzyme Microb Technol 2006. [DOI: 10.1016/j.enzmictec.2005.12.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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14
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Visser JM, Jong GA, Vries S, Robertson LA, Kuenen J. cbb3-type cytochrome oxidase in the obligately chemolithoautotrophic Thiobacillus sp. W5. FEMS Microbiol Lett 2006. [DOI: 10.1111/j.1574-6968.1997.tb10231.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Krishnakumar B, Majumdar S, Manilal VB, Haridas A. Treatment of sulphide containing wastewater with sulphur recovery in a novel reverse fluidized loop reactor (RFLR). WATER RESEARCH 2005; 39:639-647. [PMID: 15707637 DOI: 10.1016/j.watres.2004.11.015] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2004] [Revised: 10/09/2004] [Accepted: 11/04/2004] [Indexed: 05/24/2023]
Abstract
A novel aerobic bioreactor, the reverse fluidized loop reactor (RFLR) was tested for recovering sulphur from aqueous sulphide in this study. The RFLR contained buoyant carrier particles on which chemolithotrophic sulphide oxidizing bacteria formed a biofilm, which oxidized sulphide to sulphur and separated from the aqueous phase. The redox potential of the RFLR was regulated to control the oxygenation of sulphide for sulphur production. The RFLR was operated without any pH control and under various controlled pHs. The sulphide removal and nature of products formed under various sulphide loading rates and pH were examined. Under pH uncontrolled state, 95% of sulphur was recovered up to 11 kg sulphide/m3 d. The maximum sulphide loading supplied to the reactor was 30 kg sulphide/m3 d at pH 8, of which 90% was completely oxidized and 65% recovered as sulphur. The decline in bacterial sulphide oxidation leads to chemical oxidation of sulphide and subsequent accumulation of intermediary products such as thiosulphate and polysulphide in the reactor.
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Affiliation(s)
- B Krishnakumar
- Environmental Technology Programme, Regional Research Laboratory (CSIR), Industrial Estate (PO), Trivandrum 695 019, India.
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16
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Alcantara S, Velasco A, Muñoz A, Cid J, Revah S, Razo-Flores E. Hydrogen sulfide oxidation by a microbial consortium in a recirculation reactor system: sulfur formation under oxygen limitation and removal of phenols. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2004; 38:918-23. [PMID: 14968883 DOI: 10.1021/es034527y] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Wastewater from petroleum refining may contain a number of undesirable contaminants including sulfides, phenolic compounds, and ammonia. The concentrations of these compounds must be reduced to acceptable levels before discharge. Sulfur formation and the effect of selected phenolic compounds on the sulfide oxidation were studied in autotrophic aerobic cultures. A recirculation reactor system was implemented to improve the elemental sulfur recovery. The relation between oxygen and sulfide was determined calculating the O2/S2- loading rates (Q(O2)/Q(S)2- = Rmt), which adequately defined the operation conditions to control the sulfide oxidation. Sulfur-producing steady states were achieved at Rmt ranging from 0.5 to 1.5. The maximum sulfur formation occurred at Rmt of 0.5 where 85% of the total sulfur added to the reactor as sulfide was transformed to elemental sulfur and 90% of it was recovered from the bottom of the reactor. Sulfide was completely oxidized to sulfate (Rmt of 2) in a stirred tank reactor, even when a mixture of phenolic compounds was present in the medium. Microcosm experiments showed that carbon dioxide production increased in the presence of the phenols, suggesting that these compounds were oxidized and that they may have been used as carbon and energy source by heterotrophic microorganisms present in the consortium.
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Affiliation(s)
- Sergio Alcantara
- Programa de Biotecnología, Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas 152, C.P. 07730, México D.F
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17
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Malik A, Dastidar MG, Roychoudhury PK. Biodesulphurization of coal: mechanism and rate limiting factors. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2001; 36:1113-1128. [PMID: 11501309 DOI: 10.1081/ese-100104135] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The pyrite sulphur removal from coal by Thiobacillus ferrooxidans was studied in batch reactor. A combination of SEM, IR and XRD was used to study the presence of superficial phases and the changes in solid surface during biodesulphurization. Biodesulphurization was found to be a three-step process. In the first step (0-4 days), direct oxidation of pyrite by bacteria brought about 28% pyritic sulphur removal. Both direct and indirect oxidation contributed to the second step (4-10 days) resulting in 51% pyrite removal. The deposition of elemental sulphur, jarosite and ferric sulphate precipitates in the third step reduced the pyrite availability and ferric iron concentration in the leachate and brought the process of biodesulphurization to an end.
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Affiliation(s)
- A Malik
- Centre for Energy Studies, Indian Institute of Technology, New Delhi 110016, India.
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Briand L, Bonetto R, Ladaga J, Donati E. Bulk and surface characterization of crystalline and plastic sulphur oxidized by two Thiobacillus species. Process Biochem 1999. [DOI: 10.1016/s0032-9592(98)00091-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Visser JM, Robertson LA, Van Verseveld HW, Kuenen JG. Sulfur production by obligately chemolithoautotrophic thiobacillus species. Appl Environ Microbiol 1997; 63:2300-5. [PMID: 16535627 PMCID: PMC1389182 DOI: 10.1128/aem.63.6.2300-2305.1997] [Citation(s) in RCA: 77] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Transient-state experiments with the obligately autotrophic Thiobacillus sp. strain W5 revealed that sulfide oxidation proceeds in two physiological phases, (i) the sulfate-producing phase and (ii) the sulfur- and sulfate-producing phase, after which sulfide toxicity occurs. Specific sulfur-producing characteristics were independent of the growth rate. Sulfur formation was shown to occur when the maximum oxidative capacity of the culture was approached. In order to be able to oxidize increasing amounts of sulfide, the organism has to convert part of the sulfide to sulfur (HS(sup-)(symbl)S(sup0) + H(sup+) + 2e(sup-)) instead of sulfate (HS(sup-) + 4H(inf2)O(symbl)SO(inf4)(sup2-) + 9 H(sup+) + 8e(sup-)), thereby keeping the electron flux constant. Measurements of the in vivo degree of reduction of the cytochrome pool as a function of increasing sulfide supply suggested a redox-related down-regulation of the sulfur oxidation rate. Comparison of the sulfur-producing properties of Thiobacillus sp. strain W5 and Thiobacillus neapolitanus showed that the former has twice the maximum specific sulfide-oxidizing capacity of the latter (3.6 versus 1.9 (mu)mol/mg of protein/min). Their maximum specific oxygen uptake rates were very similar. Significant mechanistic differences in sulfur production between the high-sulfur-producing Thiobacillus sp. strain W5 and the moderate-sulfur-producing species T. neapolitanus were not observed. The limited sulfide-oxidizing capacity of T. neapolitanus appears to be the reason that it can convert only 50% of the incoming sulfide to elemental sulfur.
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