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Park SY, Zhang Y, Kwon JS, Kwon MJ. Multi-approach assessment of groundwater biogeochemistry: Implications for the site characterization of prospective spent nuclear fuel repository sites. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 926:171918. [PMID: 38522553 DOI: 10.1016/j.scitotenv.2024.171918] [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: 01/06/2024] [Revised: 03/10/2024] [Accepted: 03/21/2024] [Indexed: 03/26/2024]
Abstract
The disposal of spent nuclear fuel in deep subsurface repositories using multi-barrier systems is considered to be the most promising method for preventing radionuclide leakage. However, the stability of the barriers can be affected by the activities of diverse microbes in subsurface environments. Therefore, this study investigated groundwater geochemistry and microbial populations, activities, and community structures at three potential spent nuclear fuel repository construction sites. The microbial analysis involved a multi-approach including both culture-dependent, culture-independent, and sequence-based methods for a comprehensive understanding of groundwater biogeochemistry. The results from all three sites showed that geochemical properties were closely related to microbial population and activities. Total number of cells estimates were strongly correlated to high dissolved organic carbon; while the ratio of adenosine-triphosphate:total number of cells indicated substantial activities of sulfate reducing bacteria. The 16S rRNA gene sequencing revealed that the microbial communities differed across the three sites, with each featuring microbes performing distinctive functions. In addition, our multi-approach provided some intriguing findings: a site with a low relative abundance of sulfate reducing bacteria based on the 16S rRNA gene sequencing showed high populations during most probable number incubation, implying that despite their low abundance, sulfate reducing bacteria still played an important role in sulfate reduction within the groundwater. Moreover, a redundancy analysis indicated a significant correlation between uranium concentrations and microbial community compositions, which suggests a potential impact of uranium on microbial community. These findings together highlight the importance of multi-methodological assessments in better characterizing groundwater biogeochemical properties for the selection of potential spent nuclear fuel disposal sites.
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Affiliation(s)
- Su-Young Park
- Department of Earth and Environmental Sciences, Korea University, Seoul, Republic of Korea
| | - Yidan Zhang
- Department of Earth and Environmental Sciences, Korea University, Seoul, Republic of Korea
| | - Jang-Soon Kwon
- Korea Atomic Energy Research Institute, Daejeon, Republic of Korea
| | - Man Jae Kwon
- Department of Earth and Environmental Sciences, Korea University, Seoul, Republic of Korea.
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2
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Ghaderikia A, Taskin B, Yilmazel YD. Start-up strategies of electromethanogenic reactors for methane production from cattle manure. WASTE MANAGEMENT (NEW YORK, N.Y.) 2023; 159:27-38. [PMID: 36731254 DOI: 10.1016/j.wasman.2023.01.027] [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: 11/15/2022] [Revised: 01/10/2023] [Accepted: 01/24/2023] [Indexed: 06/18/2023]
Abstract
This study qualitatively assessed the impacts of different start-up strategies on the performance of methane (CH4) production from cattle manure (CM) in electromethanogenic reactors. Single chamber MECs were operated with an applied voltage of 0.7 V and the impact of electrode acclimatization with a simple substrate, acetate (ACE) vs a complex waste, CM, was compared. Upon biofilm formation on the sole carbon source (ACE or CM), several MECs (ACE_CM and CM_ACE) were subjected to cross-feeding (switching substrate to CM or ACE) during the test period to evaluate the impact of the primary substrate. Even though there was twice as much peak current density via feeding ACE during biofilm formation, this did not translate into higher CH4 production during the test period, when reactors were fed with CM. Higher or similar CH4 production was recorded in CM_CM reactors compared to ACE_CM at various soluble chemical oxygen demand (sCOD) concentrations. Additionally, feeding ACE as primary substrate did not significantly impact either COD removals or coulombic efficiencies. On the other hand, the use of anaerobic digester (AD) seed as an inoculum in CM-fed MECs (CM_CM), relative to no inoculum added MECs (Blank), increased the initial CH4 production rate by 45% and reduced the start-up time by 20%. In CM-fed MECs, Geobacter dominated bacterial communities of bioanodes and hydrogenotrophic methanogen Methanoculleus dominated archaeal communities of biocathodes. Community cluster analysis revealed the significance of primary substrate in shaping electrode biofilm; thus, it should be carefully selected for successful start-up of electromethanogenic reactors treating wastes.
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Affiliation(s)
- Amin Ghaderikia
- Department of Environmental Engineering, Faculty of Engineering, Middle East Technical University, Ankara, Turkey
| | - Bilgin Taskin
- Department of Agricultural Biotechnology, Faculty of Agriculture, Van Yuzuncu Yil University, Van, Turkey
| | - Yasemin Dilsad Yilmazel
- Department of Environmental Engineering, Faculty of Engineering, Middle East Technical University, Ankara, Turkey.
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3
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Park K, Kim CY, Kirk MF, Chae G, Kwon MJ. Effects of natural non-volcanic CO 2 leakage on soil microbial community composition and diversity. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 862:160754. [PMID: 36513229 DOI: 10.1016/j.scitotenv.2022.160754] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 11/22/2022] [Accepted: 12/03/2022] [Indexed: 06/17/2023]
Abstract
Geological carbon capture and storage (CCS) can reduce anthropogenic CO2 emissions, but questions exist about impacts at the surface if CO2 leaks from deep storage reservoirs. To examine potential impacts on soils, previous studies have investigated the geochemistry and microbiology of volcanic soils hosting high fluxes of CO2 rich gas. This study builds on those previous investigations by considering impacts of CO2 leakage at a non-volcanic site, where deep geogenic CO2 leaks from a cracked well casing. At the site, we collected 26 soil cores adjacent to soil gas monitoring wells. Based on measured CO2 fluxes, the soil samples fall into two groups 1) high CO2 (flux = 304.6 ± 272.1 g m-2 d-1, conc. = 29.1 ± 34 %) and 2) low CO2 (flux = 15.8 ± 6.1 g m-2 d-1, conc. = 0.8 ± 0.9 %). Soil pH was significantly lower (p < 0.05) in high flux group samples (4.6 ± 0.3) than the low flux ones (5.3 ± 0.7). Beta diversity calculations using 16S rRNA gene sequences and redundancy analysis (RDA) revealed clear clustering of microbial communities relative to CO2 flux and significant correlations of community composition with pH and organic carbon content. In the high flux soils, abundant microbial groups included Acidobacteriota, Ktedonobacteria, and SC-I-84 in the phylum Proteobacteria, as well as Nitrososphaeria, a genus of ammonia oxidizing archaea. Compared to volcanic sites described previously, our non-volcanic site had slight differences in soil geochemical properties and gradual shifts in community compositions between CO2 hotspots and background locations. Moreover, the elevated abundance of SC-I-84 has not been reported in studies of volcanic sites. This study improves our ability to predict potential environmental impacts of geological CCS by expanding the range of conditions over which existing CO2 leakage has been observed.
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Affiliation(s)
- Kanghyun Park
- Department of Earth and Environmental Sciences, Korea University, Seoul 02841, South Korea
| | - Chan Yeong Kim
- Korea Institute of Geoscience and Mineral Resources (KIGAM), Daejeon 34132, South Korea; GeoGreen21, 55 Digital-ro 33-gil, Guro-gu, Seoul 08376, South Korea
| | - Matthew F Kirk
- Department of Geology, Kansas State University, Manhattan, KS 66506, USA
| | - Gitak Chae
- Korea Institute of Geoscience and Mineral Resources (KIGAM), Daejeon 34132, South Korea.
| | - Man Jae Kwon
- Department of Earth and Environmental Sciences, Korea University, Seoul 02841, South Korea.
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4
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Hassler HB, Probert B, Moore C, Lawson E, Jackson RW, Russell BT, Richards VP. Phylogenies of the 16S rRNA gene and its hypervariable regions lack concordance with core genome phylogenies. MICROBIOME 2022; 10:104. [PMID: 35799218 PMCID: PMC9264627 DOI: 10.1186/s40168-022-01295-y] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 05/23/2022] [Indexed: 05/02/2023]
Abstract
BACKGROUND The 16S rRNA gene is used extensively in bacterial phylogenetics, in species delineation, and now widely in microbiome studies. However, the gene suffers from intragenomic heterogeneity, and reports of recombination and an unreliable phylogenetic signal are accumulating. Here, we compare core gene phylogenies to phylogenies constructed using core gene concatenations to estimate the strength of signal for the 16S rRNA gene, its hypervariable regions, and all core genes at the intra- and inter-genus levels. Specifically, we perform four intra-genus analyses (Clostridium, n = 65; Legionella, n = 47; Staphylococcus, n = 36; and Campylobacter, n = 17) and one inter-genus analysis [41 core genera of the human gut microbiome (31 families, 17 orders, and 12 classes), n = 82]. RESULTS At both taxonomic levels, the 16S rRNA gene was recombinant and subject to horizontal gene transfer. At the intra-genus level, the gene showed one of the lowest levels of concordance with the core genome phylogeny (50.7% average). Concordance for hypervariable regions was lower still, with entropy masking providing little to no benefit. A major factor influencing concordance was SNP count, which showed a positive logarithmic association. Using this relationship, we determined that 690 ± 110 SNPs were required for 80% concordance (average 16S rRNA gene SNP count was 254). We also found a wide range in 16S-23S-5S rRNA operon copy number among genomes (1-27). At the inter-genus level, concordance for the whole 16S rRNA gene was markedly higher (73.8% - 10th out of 49 loci); however, the most concordant hypervariable regions (V4, V3-V4, and V1-V2) ranked in the third quartile (62.5 to 60.0%). CONCLUSIONS Ramifications of a poor phylogenetic performance for the 16S rRNA gene are far reaching. For example, in addition to incorrect species/strain delineation and phylogenetic inference, it has the potential to confound community diversity metrics if phylogenetic information is incorporated - for example, with popular approaches such as Faith's phylogenetic diversity and UniFrac. Our results highlight the problematic nature of these approaches and their use (along with entropy masking) is discouraged. Lastly, the wide range in 16S rRNA gene copy number among genomes also has a strong potential to confound diversity metrics. Video Abstract.
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Affiliation(s)
- Hayley B. Hassler
- Department of Biological Sciences, College of Science, Clemson University, Clemson, SC 29634 USA
| | - Brett Probert
- Department of Biological Sciences, College of Science, Clemson University, Clemson, SC 29634 USA
| | - Carson Moore
- Department of Biological Sciences, College of Science, Clemson University, Clemson, SC 29634 USA
| | - Elizabeth Lawson
- Department of Biological Sciences, College of Science, Clemson University, Clemson, SC 29634 USA
| | | | - Brook T. Russell
- School of Mathematical and Statistical Sciences, Clemson University, Clemson, SC 29634 USA
| | - Vincent P. Richards
- Department of Biological Sciences, College of Science, Clemson University, Clemson, SC 29634 USA
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5
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Choi BY, Park J, Ham B, Kirk MF, Kwon MJ. Effect of CO 2 on biogeochemical reactions and microbial community composition in bioreactors with deep groundwater and basalt. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 807:150803. [PMID: 34626629 DOI: 10.1016/j.scitotenv.2021.150803] [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: 07/12/2021] [Revised: 10/01/2021] [Accepted: 10/01/2021] [Indexed: 06/13/2023]
Abstract
Changes in subsurface microbiology following CO2 injection have the potential to impact carbon trapping in CO2 storage reservoirs. However, much remains to be learned about responses of natural microbial consortia to elevated CO2 in basaltic systems. This study asks: how will microbes from deep (700 m) groundwater change along a gradient in CO2 (0-20 psi) in batch reactor systems containing basalt chips and groundwater amended with lactate? Reactors incubated for 87 days at 23 °C. Results for reactors with low CO2 (0 and 3 psi) differed considerably from those with high CO2 (10 and 20 psi). In reactors with low CO2, pH was >6.5 and lactate started to be used within 24 days. By 40 days, lactate was completely consumed and acetate increased to ~4 mM. As lactate was consumed, sulfate decreased from 0.16 to 0 mM after 40 days. In contrast, in reactors with high CO2, pH was <6.5, lactate and sulfate concentrations varied little and acetate was not produced. Biogeochemical modeling and community analyses indicate that differences between reactors with low and high CO2 reflect tolerances of reactor microbes to CO2 exposure. Communities in the low CO2 reactors carried out syntrophic lactate oxidation coupled with methanogenesis and sulfate reduction. Bacteroidota and Firmicutes became dominant phyla after 24 days and groups capable of sulfate reduction and methanogenesis were detected. In reactors with high CO2, however, biogeochemical activity was insignificant, no groups capable of sulfate reducion or methanogenesis were observed, and the community became less diverse during the incubation. These findings show that the response of microbial consortia can vary sharply along a CO2 gradient, creating significant differences in community composition and biogeochemistry, and that the timescale of basalt weathering is likely not rapid enough to prevent significant stress following a rapid increase in CO2 abundance.
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Affiliation(s)
- Byoung-Young Choi
- Korea Institute of Geoscience and Mineral Resources, Daejeon, South Korea.
| | - Jinyoung Park
- Korea Institute of Geoscience and Mineral Resources, Daejeon, South Korea
| | - Baknoon Ham
- Department of Earth and Environmental Sciences, Korea University, Seoul, South Korea
| | - Matthew F Kirk
- Department of Geology, Kansas State University, Manhattan, KS, United States
| | - Man Jae Kwon
- Department of Earth and Environmental Sciences, Korea University, Seoul, South Korea.
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6
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Park SC, Boyanov MI, Kemner KM, O'Loughlin EJ, Kwon MJ. Distribution and speciation of Sb and toxic metal(loid)s near an antimony refinery and their effects on indigenous microorganisms. JOURNAL OF HAZARDOUS MATERIALS 2021; 403:123625. [PMID: 32818830 DOI: 10.1016/j.jhazmat.2020.123625] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 07/25/2020] [Accepted: 07/26/2020] [Indexed: 06/11/2023]
Abstract
Although several studies have investigated the effects of Sb contamination on surrounding environments and indigenous microorganisms, little is known about the effect of co-contamination of Sb and toxic metal(loid)s. In this study, the occurrence of Sb and other toxic metal(loid)s near an operating Sb refinery and near-field landfill site were investigated. Topsoil samples near the refinery had high Sb levels (∼3250 mg kg-1) but relatively low concentrations of other toxic metal(loid)s. However, several soil samples taken at greater depth from the near-field landfill site contained high concentrations of As and Pb, as well as extremely high Sb contents (∼21,400 mg kg-1). X-ray absorption fine structure analysis showed that Sb in the soils from both sites was present as Sb(V) in the form of tripuhyite (FeSbO4), a stable mineral. Three-dimensional principal coordinate analysis showed that microbial community compositions in samples with high toxic metal(loid)s concentrations were significantly different from other samples and had lower microbial populations (∼104 MPN g-1). Sequential extraction results revealed that Sb is present primarily in the stable residual fraction (∼99 %), suggesting low Sb bioavailability. However, microbial redundancy analysis suggested that the more easily extractable Pb might be the major factor controlling microbial community compositions at the site.
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Affiliation(s)
- Soo-Chan Park
- Dept. Earth and Environmental Sciences, Korea University, Seoul, 02841, Republic of Korea
| | - Maxim I Boyanov
- Bulgarian Academy of Sciences, Institute of Chemical Engineering, Sofia, 1113, Bulgaria; Biosciences Division, Argonne National Laboratory, Lemont, IL, 60439 USA
| | - Kenneth M Kemner
- Biosciences Division, Argonne National Laboratory, Lemont, IL, 60439 USA
| | | | - Man Jae Kwon
- Dept. Earth and Environmental Sciences, Korea University, Seoul, 02841, Republic of Korea.
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7
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Liu Q, Adler K, Lipus D, Kämpf H, Bussert R, Plessen B, Schulz HM, Krauze P, Horn F, Wagner D, Mangelsdorf K, Alawi M. Microbial Signatures in Deep CO 2-Saturated Miocene Sediments of the Active Hartoušov Mofette System (NW Czech Republic). Front Microbiol 2020; 11:543260. [PMID: 33381087 PMCID: PMC7768021 DOI: 10.3389/fmicb.2020.543260] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Accepted: 11/20/2020] [Indexed: 01/04/2023] Open
Abstract
The Hartoušov mofette system is a natural CO2 degassing site in the central Cheb Basin (Eger Rift, Central Europe). In early 2016 a 108 m deep core was obtained from this system to investigate the impact of ascending mantle-derived CO2 on indigenous deep microbial communities and their surrounding life habitat. During drilling, a CO2 blow out occurred at a depth of 78.5 meter below surface (mbs) suggesting a CO2 reservoir associated with a deep low-permeable CO2-saturated saline aquifer at the transition from Early Miocene terrestrial to lacustrine sediments. Past microbial communities were investigated by hopanoids and glycerol dialkyl glycerol tetraethers (GDGTs) reflecting the environmental conditions during the time of deposition rather than showing a signal of the current deep biosphere. The composition and distribution of the deep microbial community potentially stimulated by the upward migration of CO2 starting during Mid Pleistocene time was investigated by intact polar lipids (IPLs), quantitative polymerase chain reaction (qPCR), and deoxyribonucleic acid (DNA) analysis. The deep biosphere is characterized by microorganisms that are linked to the distribution and migration of the ascending CO2-saturated groundwater and the availability of organic matter instead of being linked to single lithological units of the investigated rock profile. Our findings revealed high relative abundances of common soil and water bacteria, in particular the facultative, anaerobic and potential iron-oxidizing Acidovorax and other members of the family Comamonadaceae across the whole recovered core. The results also highlighted the frequent detection of the putative sulfate-oxidizing and CO2-fixating genus Sulfuricurvum at certain depths. A set of new IPLs are suggested to be indicative for microorganisms associated to CO2 accumulation in the mofette system.
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Affiliation(s)
- Qi Liu
- Section Geomicrobiology, GFZ German Research Centre for Geosciences, Potsdam, Germany.,Institute of Geosciences, University of Potsdam, Potsdam, Germany
| | - Karsten Adler
- Institute of Geosciences, University of Potsdam, Potsdam, Germany.,Section Organic Geochemistry, GFZ German Research Centre for Geosciences, Potsdam, Germany
| | - Daniel Lipus
- Section Geomicrobiology, GFZ German Research Centre for Geosciences, Potsdam, Germany
| | - Horst Kämpf
- Section Organic Geochemistry, GFZ German Research Centre for Geosciences, Potsdam, Germany
| | - Robert Bussert
- Section Applied Geochemistry, Institute of Applied Geosciences, Technische Universität Berlin, Berlin, Germany
| | - Birgit Plessen
- Section Climate Dynamics and Landscape Evolution, GFZ German Research Centre for Geosciences, Potsdam, Germany
| | - Hans-Martin Schulz
- Section Organic Geochemistry, GFZ German Research Centre for Geosciences, Potsdam, Germany
| | - Patryk Krauze
- Section Geomicrobiology, GFZ German Research Centre for Geosciences, Potsdam, Germany.,Institute of Geosciences, University of Potsdam, Potsdam, Germany
| | - Fabian Horn
- Section Geomicrobiology, GFZ German Research Centre for Geosciences, Potsdam, Germany
| | - Dirk Wagner
- Section Geomicrobiology, GFZ German Research Centre for Geosciences, Potsdam, Germany.,Institute of Geosciences, University of Potsdam, Potsdam, Germany
| | - Kai Mangelsdorf
- Section Organic Geochemistry, GFZ German Research Centre for Geosciences, Potsdam, Germany
| | - Mashal Alawi
- Section Geomicrobiology, GFZ German Research Centre for Geosciences, Potsdam, Germany
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Zhang H, Zhang B, Wang S, Chen J, Jiang B, Xing Y. Spatiotemporal vanadium distribution in soils with microbial community dynamics at vanadium smelting site. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 265:114782. [PMID: 32454384 DOI: 10.1016/j.envpol.2020.114782] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 05/03/2020] [Accepted: 05/08/2020] [Indexed: 06/11/2023]
Abstract
Whereas the adverse effects of vanadium released from smelting activities on soil microbial ecology have been widely recognized, little is known about spatiotemporal vanadium distribution and microbial community dynamics in typical contaminated sites. This study describes vanadium contents associated with health risk and microbial responses in both topsoil and subsoil during four consecutive seasons around an ongoing-production smelter in Panzhihua, China. Higher levels of vanadium concentration exceeding soil background value in China (82 mg/kg) were found close to the smelter. Vanadium concentrations decreased generally with the increase in distance to the smelter and depth below surface, as soil vanadium pollution is induced mainly by atmospheric deposition of vanadium bearing dust during smelting. Residual fraction was the predominated vanadium form in soils, with pronounced increase in bioavailable vanadium during rainfall period due to frequent drought-rewetting process. Topsoil close to the smelter exhibited significant contamination, inducing high probability of adverse health effects. Spatiotemporal vanadium distribution creates filtering effects on soil microorganisms, promoting metal tolerant genera in topsoil (e.g. Microvirga) and subsoil (e.g. Bacillus, Geobacter), which is the key in maintaining the community structure by promoting cooperative relation with other taxa. Our results reveal spatiotemporal vanadium distribution in soils at site scale with potential health risk and microbial responses, which is helpful in identifying severe contamination and implementing bioremediation.
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Affiliation(s)
- Han Zhang
- School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing, 100083, PR China
| | - Baogang Zhang
- School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing, 100083, PR China.
| | - Song Wang
- School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing, 100083, PR China
| | - Junlin Chen
- School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing, 100083, PR China
| | - Bo Jiang
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, Beijing, 100083, PR China
| | - Yi Xing
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, Beijing, 100083, PR China
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9
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Gulliver D, Lipus D, Ross D, Bibby K. Insights into microbial community structure and function from a shallow, simulated CO 2 -leakage aquifer demonstrate microbial selection and adaptation. ENVIRONMENTAL MICROBIOLOGY REPORTS 2019; 11:338-351. [PMID: 29984552 DOI: 10.1111/1758-2229.12675] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 05/30/2018] [Accepted: 07/02/2018] [Indexed: 06/08/2023]
Abstract
Geological carbon storage is likely to be a part of a comprehensive strategy to minimize the atmospheric release of carbon dioxide (CO2 ), raising concerns that injected CO2 will leak into overlying freshwater aquifers. CO2(aq) leakage may impact the dominant microbial community responsible for important ecosystem functions such as nutrient cycling, metal cycling and carbon conversion. Here, we examined the impact of an experimental in situ CO2 -leakage on a freshwater aquifer microbial community. High-throughput 16S rRNA gene sequencing demonstrated lower microbial diversity in freshwater wells with CO2 concentrations above 1.15 g l-1 . Metagenomic sequencing and population genome binning were used to evaluate the metabolic potential of microbial populations across four CO2 exposed samples and one control sample. Population genome binning resulted in the recovery and annotation of three metagenome assembled genomes (MAGs). Two of the MAGs, most closely related to Curvibacter and Sulfuricurvum, had the functional capacity for CO2 utilization via carbon fixation coupled to sulfur and iron oxidation. The third draft genome was an Archaea, most closely related to Methanoregula, characterized by the metabolic potential for methanogenesis. Together, these findings show that CO2 leakage in a freshwater aquifer poses a strong selection, driving both microbial community structure and metabolic function.
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Affiliation(s)
- Djuna Gulliver
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, USA
| | - Daniel Lipus
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, USA
- Oak Ridge Institute for Science and Education, Oak Ridge, TN, USA
| | - Daniel Ross
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, USA
- AECOM, Pittsburgh, PA, USA
| | - Kyle Bibby
- Oak Ridge Institute for Science and Education, Oak Ridge, TN, USA
- Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame, South Bend, IN, USA
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10
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Zeng T, Li L, Mo G, Wang G, Liu H, Xie S. Analysis of uranium removal capacity of anaerobic granular sludge bacterial communities under different initial pH conditions. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:5613-5622. [PMID: 30612368 DOI: 10.1007/s11356-018-4017-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 12/17/2018] [Indexed: 06/09/2023]
Abstract
The bacterial community of an anaerobic granular sludge associated with uranium depletion was investigated following its exposure to uranium under different initial pH conditions (pH 4.5, 5.5, and 6.5). The highest uranium removal efficiency (98.1%) was obtained for the sample with an initial pH of 6.5, which also supported the highest bacterial community richness and diversity. Venn diagrams visualized the decrease in the number of genera present in both the inoculum and the uranium-exposed biomass as the initial pH decreased from 6.5 to 4.5. Compared with the inoculum, a significant increase in the abundances of the phyla Chloroflexi and Proteobacteria was observed following uranium exposure. At initial pH conditions of 6.5 to 4.5, the proportions of the taxa Anaerolineaceae, Chryseobacterium, Acinetobacter, Pseudomonas, and Sulfurovum increased significantly, likely contributing to the observed uranium removal. Uranium exposure induced a greater level of dynamic diversification of bacterial abundances than did the initial pH difference.
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Affiliation(s)
- Taotao Zeng
- Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, 421001, People's Republic of China.
| | - Licheng Li
- Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, 421001, People's Republic of China
| | - Guanhai Mo
- Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, 421001, People's Republic of China
| | - Guohua Wang
- Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, 421001, People's Republic of China
| | - Haiyan Liu
- Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, 421001, People's Republic of China
| | - Shuibo Xie
- Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, 421001, People's Republic of China.
- Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, 421001, People's Republic of China.
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11
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Shelton JL, Andrews RS, Akob DM, DeVera CA, Mumford A, McCray JE, McIntosh JC. Microbial community composition of a hydrocarbon reservoir 40 years after a CO2 enhanced oil recovery flood. FEMS Microbiol Ecol 2018; 94:5067868. [PMID: 30101289 PMCID: PMC6108538 DOI: 10.1093/femsec/fiy153] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 08/07/2018] [Indexed: 11/17/2022] Open
Abstract
Injecting CO2 into depleted oil reservoirs to extract additional crude oil is a common enhanced oil recovery (CO2-EOR) technique. However, little is known about how in situ microbial communities may be impacted by CO2 flooding, or if any permanent microbiological changes occur after flooding has ceased. Formation water was collected from an oil field that was flooded for CO2-EOR in the 1980s, including samples from areas affected by or outside of the flood region, to determine the impacts of CO2-EOR on reservoir microbial communities. Archaea, specifically methanogens, were more abundant than bacteria in all samples, while identified bacteria exhibited much greater diversity than the archaea. Microbial communities in CO2-impacted and non-impacted samples did not significantly differ (ANOSIM: Statistic R = -0.2597, significance = 0.769). However, several low abundance bacteria were found to be significantly associated with the CO2-affected group; very few of these species are known to metabolize CO2 or are associated with CO2-rich habitats. Although this study had limitations, on a broad scale, either the CO2 flood did not impact the microbial community composition of the target formation, or microbial communities in affected wells may have reverted back to pre-injection conditions over the ca. 40 years since the CO2-EOR.
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Affiliation(s)
- Jenna Lk Shelton
- Eastern Energy Resources Science Center, U.S. Geological Survey, 12201 Sunrise Valley Drive, Reston, VA, 20192 USA
| | - Robert S Andrews
- Water Mission Area, U.S. Geological Survey, 12201 Sunrise Valley Drive, Reston, VA, 20192 USA
| | - Denise M Akob
- Water Mission Area, U.S. Geological Survey, 12201 Sunrise Valley Drive, Reston, VA, 20192 USA
| | - Christina A DeVera
- Eastern Energy Resources Science Center, U.S. Geological Survey, 12201 Sunrise Valley Drive, Reston, VA, 20192 USA
| | - Adam Mumford
- Water Mission Area, U.S. Geological Survey, 12201 Sunrise Valley Drive, Reston, VA, 20192 USA
| | - John E McCray
- Department of Civil and Environmental Engineering, Colorado School of Mines, 1500 Illisnois Street, Golden, CO, 80401 USA.,Hydrologic Science and Engineering Program, Colorado School of Mines, 1500 Illinois Street, Golden, CO, 80401 USA
| | - Jennifer C McIntosh
- Department of Hydrology and Atmospheric Sciences, University of Arizona, 1133 E. James E. Rogers Way, Tucson, AZ, 85721 USA
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