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Chen S, Chen J, Zhang L, Huang S, Liu X, Yang Y, Luan T, Zhou S, Nealson KH, Rensing C. Biophotoelectrochemical process co-driven by dead microalgae and live bacteria. THE ISME JOURNAL 2023; 17:712-719. [PMID: 36823233 PMCID: PMC10119253 DOI: 10.1038/s41396-023-01383-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 02/08/2023] [Accepted: 02/10/2023] [Indexed: 02/25/2023]
Abstract
Anaerobic reduction processes in natural waters can be promoted by dead microalgae that have been attributed to nutrient substances provided by the decomposition of dead microalgae for other microorganisms. However, previous reports have not considered that dead microalgae may also serve as photosensitizers to drive microbial reduction processes. Here we demonstrate a photoelectric synergistic linkage between dead microalgae and bacteria capable of extracellular electron transfer (EET). Illumination of dead Raphidocelis subcapitata resulted in two-fold increase in the rate of anaerobic bioreduction by pure Geobacter sulfurreducens, suggesting that photoelectrons generated from the illuminated dead microalgae were transferred to the EET-capable microorganisms. Similar phenomena were observed in NO3- reduction driven by irradiated dead Chlorella vulgaris and living Shewanella oneidensis, and Cr(VI) reduction driven by irradiated dead Raphidocelis subcapitata and living Bacillus subtilis. Enhancement of bioreduction was also seen when the killed microalgae were illuminated in mixed-culture lake water, suggesting that EET-capable bacteria were naturally present and this phenomenon is common in post-bloom systems. The intracellular ferredoxin-NADP+-reductase is inactivated in the dead microalgae, allowing the production and extracellular transfer of photoelectrons. The use of mutant strains confirmed that the electron transport pathway requires multiheme cytochromes. Taken together, these results suggest a heretofore overlooked biophotoelectrochemical process jointly mediated by illumination of dead microalgae and live EET-capable bacteria in natural ecosystems, which may add an important component in the energetics of bioreduction phenomena particularly in microalgae-enriched environments.
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Affiliation(s)
- Shanshan Chen
- Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou, China
| | - Jin Chen
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Lanlan Zhang
- Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou, China
| | - Shaofu Huang
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Xing Liu
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Yuting Yang
- Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou, China
| | - Tiangang Luan
- Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou, China
| | - Shungui Zhou
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, China.
| | - Kenneth H Nealson
- Department of Earth Science, University of Southern California, Los Angeles, CA, USA
| | - Christopher Rensing
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, China
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Nanomaterials: An alternative source for biodegradation of toxic dyes. Food Chem Toxicol 2022; 164:112996. [PMID: 35398443 DOI: 10.1016/j.fct.2022.112996] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 03/25/2022] [Accepted: 04/04/2022] [Indexed: 11/22/2022]
Abstract
Environment contamination is a colossal worriment across the world, owing to its detrimental and negative impact on health and ecological systems. Dyes are one of the synthetic organic chemicals that are utilised in a variety of fields, including textiles. As a result, throughout one's production and subsequently in fibre colouring, these are becoming frequent industry-contributed contaminants. Increasing globalisation of international market has presented a problem to textile sector in terms of consistency and production. Textile processors' primary concern, as the highly competitive environment and environmental standards grow more severe is about being mindful of the grade of goods and even non-toxicity of their production processes. There seems to be an immediate necessity to look for methods and technologies which are useful in removing dye colours. Even though each has benefits and weaknesses, many physical, chemical, and biological approaches were explored and used with the application being dependent on the effluent properties, technical feasibility, and cost. Several remediation technologies are already developed, but they seem to be ineffective at removing dyes completely. There is a fast growth of nanoparticles applications in the past few years which has opened up newer, innovating, highly efficient, and low-cost dyes remediation systems. Nanomaterials with large surface areas change surface characteristics and distinctive electron conducting capabilities which make them ideal candidate for the treatment of wastewater that contains dyes. In this review, we have highlighted not only the role of nanotechnology in dye remediation processes but also different types of nanomaterials that can be used for the remediation of dyes.
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Abstract
Over the past few decades, the synthesis and potential applications of nanocatalysts have received great attention from the scientific community. Many well-established methods are extensively utilized for the synthesis of nanocatalysts. However, most conventional physical and chemical methods have some drawbacks, such as the toxicity of precursor materials, the requirement of high-temperature environments, and the high cost of synthesis, which ultimately hinder their fruitful applications in various fields. Bioinspired synthesis is eco-friendly, cost-effective, and requires a low energy/temperature ambient. Various microorganisms such as bacteria, fungi, and algae are used as nano-factories and can provide a novel method for the synthesis of different types of nanocatalysts. The synthesized nanocatalysts can be further utilized in various applications such as the removal of heavy metals, treatment of industrial effluents, fabrication of materials with unique properties, biomedical, and biosensors. This review focuses on the biogenic synthesis of nanocatalysts from various green sources that have been adopted in the past two decades, and their potential applications in different areas. This review is expected to provide a valuable guideline for the biogenic synthesis of nanocatalysts and their concomitant applications in various fields.
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Fang Y, Chen X, Zhong Y, Yang Y, Liu F, Guo J, Xu M. Molecular mechanism of zero valent iron-enhanced microbial azo reduction. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 290:118046. [PMID: 34461416 DOI: 10.1016/j.envpol.2021.118046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 08/04/2021] [Accepted: 08/23/2021] [Indexed: 06/13/2023]
Abstract
Zero valent iron (ZVI)-microbe technology has an increasing application on the removal of organic pollution, yet the molecular mechanism of microbe respond to ZVI is still a mystery. Here, we established a successive ZVI-enhanced microbial system to remove azo dye (a typical organic pollutant) by Shewanella decolorationis S12 (S. decolorationis S12, an effective azo dye degradation bacterium) and examined the gene expression time course (10, 30, 60, and 120 min) by whole genome transcriptional analysis. The addition of ZVI to the microbial degradation system increases the rate of azo reduction from ~60% to over 99% in 16 h reaction, suggesting the synergistic effect of ZVI and S12 on azo dye degradation. Comparing with the treatment without ZVI, less filamentous cells were observed in ZVI treated system, and approximately 8% genes affiliated with 10 different gene expression profiles in S. decolorationis S12 were significantly changed in 120 min during the ZVI-enhanced azo reduction. Intriguingly, MarR transcriptional factor might play a vital role in regulating ZVI-enhanced azo reduction in the aspect of energy production, iron homeostasis, and detoxification. Further investigation showed that the induced [Ni-Fe] H2ase genes (hyaABCDEF) and azoreductase genes (mtrABC-omcA) contributed to ZVI-enhanced energy production, while the reduced iron uptake (hmuVCB and feoAB), induced sulfate assimilation (cysPTWA) and cysteine biosynthesis (cysM) related genes were essential to iron homeostasis and detoxification. This study disentangles underlying mechanisms of ZVI-enhanced organic pollution biotreatment in S. decolorationis S12.
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Affiliation(s)
- Yun Fang
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China
| | - Xingjuan Chen
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China
| | - Yin Zhong
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China
| | - Yonggang Yang
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China
| | - Fei Liu
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China
| | - Jun Guo
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China
| | - Meiying Xu
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China.
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Qin J, Qian L, Zhang J, Zheng Y, Shi J, Shen J, Ou C. Accelerated anaerobic biodecolorization of sulfonated azo dyes by magnetite nanoparticles as potential electron transfer mediators. CHEMOSPHERE 2021; 263:128048. [PMID: 33297061 DOI: 10.1016/j.chemosphere.2020.128048] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 08/01/2020] [Accepted: 08/16/2020] [Indexed: 06/12/2023]
Abstract
Anaerobic decolorization of azo dyes has been evidenced to be an economical and effective pretreatment method, but its generally limited by the low decolorization efficiency, especially for biodecolorization sulfonated azo dyes. In this study, magnetite nanoparticles (MNPs) as a conductive material, was coupled into anaerobic system for enhancing decolorization of sulfonated azo dyes, i.e., methyl orange (MO), with technology feasibility and system stability emphasized. The results showed that the anaerobic decolorization capacity was significantly enhanced with addition of MNPs (at dose of 1 g/L), where the efficiencies of MO decolorization and aromatic amines formation were as high as 97.28 ± 0.78 % and 99.44 ± 0.25%, respectively. In addition, both electron transport system activity and sludge conductivity were also significantly improved, suggesting that a direct extracellular electron transfer had been successfully established via MNPs as RMs. Under continuous-flow experiments, addition of MNPs not only improved anaerobic system resistance environmental stress (e.g., high MO concentration, low hydraulic retention time and low co-substance concentration) but also accelerated sludge granulation. The relative abundance of functional species related to dissimilatory iron reduction and MO biodegradation were also enriched under MNPs stimulation. The observed long-term stable performance suggests the full-scale application potential of this coupled system for treatment of wastewater containing sulfonated azo dyes.
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Affiliation(s)
- Juan Qin
- Nantong Key Laboratory of Intelligent and New Energy Materials, School of Chemistry and Chemical Engineering, Nantong University, Nantong, 222100, China
| | - Luwen Qian
- Nantong Key Laboratory of Intelligent and New Energy Materials, School of Chemistry and Chemical Engineering, Nantong University, Nantong, 222100, China
| | - Juntong Zhang
- Nantong Key Laboratory of Intelligent and New Energy Materials, School of Chemistry and Chemical Engineering, Nantong University, Nantong, 222100, China
| | - Yiqing Zheng
- Nantong Key Laboratory of Intelligent and New Energy Materials, School of Chemistry and Chemical Engineering, Nantong University, Nantong, 222100, China
| | - Jian Shi
- Nantong Key Laboratory of Intelligent and New Energy Materials, School of Chemistry and Chemical Engineering, Nantong University, Nantong, 222100, China
| | - Jinyou Shen
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Changjin Ou
- Nantong Key Laboratory of Intelligent and New Energy Materials, School of Chemistry and Chemical Engineering, Nantong University, Nantong, 222100, China.
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Xu J, Guo J, Xu M, Chen X. Enhancement of microbial redox cycling of iron in zero-valent iron oxidation coupling with deca-brominated diphenyl ether removal. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 748:141328. [PMID: 32798868 DOI: 10.1016/j.scitotenv.2020.141328] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 07/23/2020] [Accepted: 07/27/2020] [Indexed: 06/11/2023]
Abstract
Iron-redox cycling microorganisms are important for understanding the biogeochemical iron and play key roles in zero-valent iron (ZVI) mediated environmental bioremediation. Their influence on ZVI oxidation coupling with organic contaminant removal is of particular interest but is still poorly understood. The objective of this research was to study microbial redox cycles of iron in ZVI oxidation and deca-brominated diphenyl ether (deca-BDE) removal. It was found that iron-oxidizing bacteria (IOB) enhanced ZVI oxidation by using iron as the sole electron donor. Iron-reducing bacteria (IRB) with high activity of Fe (III) reduction, also significantly accelerated rather than inhibited ZVI oxidation. ZVI oxidation activity was increased from 3.42% to 24.28% by IOB and 19.49% by IRB. When deca-BDE was present in the medium, ZVI oxidation activity by IOB and IRB was increased from 2.67% to 48.33% and 64.33%, respectively. However, no co-accelerating effect of IOB and IRB occurred but rather a neutralizing influence on ZVI oxidation was detected with iron-redox cycling bacteria (IORB). ZVI oxidation activity by IORB only increased to 13.14% and 37.0% in the absence and presence of deca-BDE, respectively. Meanwhile, IRB also exhibited the highest removal activity of deca-BDE. Approximately 71.67% of deca-BDE was removed by IRB, compared to 18.91% by IOB and 43.24% by IORB. Deca-BDE significantly influenced the effects of iron-metabolizing microorganisms on ZVI oxidation by altering the composition of microbial communities. Pseudomonas, Paenibacillus, and Sporolactobacillus were the key genera influencing ZVI oxidation and deca-BDE removal. Sporolactobacillus was firstly reported to be able to stimulate both ZVI oxidation and deca-BDE removal. Pseudomonas accelerated ZVI oxidation but had no significant contribution to deca-BDE removal. However, Paenibacillus inhibited both Fe(III) reduction and deca-BDE removal. It is expected that continuous integration of ZVI oxidation and organic contaminant removal can be achieved by regulating the key genera in iron-metabolizing microbial communities.
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Affiliation(s)
- Jingjing Xu
- South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, PR China; Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangzhou 510070, PR China; State Key Laboratory of Applied Microbiology Southern China, Guangzhou 510070, PR China; Guangdong Institute of Microbiology, Guangdong, Academy of Sciences, Guangzhou 510070, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Jun Guo
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangzhou 510070, PR China; State Key Laboratory of Applied Microbiology Southern China, Guangzhou 510070, PR China; Guangdong Institute of Microbiology, Guangdong, Academy of Sciences, Guangzhou 510070, PR China
| | - Meiying Xu
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangzhou 510070, PR China; State Key Laboratory of Applied Microbiology Southern China, Guangzhou 510070, PR China; Guangdong Institute of Microbiology, Guangdong, Academy of Sciences, Guangzhou 510070, PR China
| | - Xingjuan Chen
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangzhou 510070, PR China; State Key Laboratory of Applied Microbiology Southern China, Guangzhou 510070, PR China; Guangdong Institute of Microbiology, Guangdong, Academy of Sciences, Guangzhou 510070, PR China.
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7
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Kong G, Song D, Guo J, Sun G, Zhu C, Chen F, Yang Y, Xu M. Lack of Periplasmic Non-heme Protein SorA Increases Shewanella decolorationis Current Generation. Front Microbiol 2020; 11:262. [PMID: 32158435 PMCID: PMC7052111 DOI: 10.3389/fmicb.2020.00262] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Accepted: 02/04/2020] [Indexed: 11/13/2022] Open
Abstract
Bacterial extracellular electron transport (EET) plays an important role in many natural and engineering processes. Some periplasmic non-heme redox proteins usually coexist with c-type cytochromes (CTCs) during the EET process. However, in contrast to CTCs, little is known about the roles of these non-heme redox proteins in EET. In this study, the transcriptome of Shewanella decolorationis S12 showed that the gene encoding a periplasmic sulfite dehydrogenase molybdenum-binding subunit SorA was significantly up-regulated during electrode respiration in microbial fuel cells (MFCs) compared with that during azo-dye reduction. The maximum current density of MFCs catalyzed by a mutant strain lacking SorA (ΔsorA) was 25% higher than that of wild strain S12 (20 vs. 16 μA/cm2). Both biofilm formation and the current generation of the anodic biofilms were increased by the disruption of sorA, which suggests that the existence of SorA in S. decolorationis S12 inhibits electrode respiration. In contrast, disruption of sorA had no effect on respiration by S. decolorationis S12 with oxygen, fumarate, azo dye, or ferric citrate as electron acceptors. This is the first report of the specific effect of a periplasmic non-heme redox protein on EET to electrode and provides novel information for enhancing bacterial current generation.
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Affiliation(s)
- Guannan Kong
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
- Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
- State Key Laboratory of Applied Microbiology Southern China, Guangzhou, China
| | - Da Song
- Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
- State Key Laboratory of Applied Microbiology Southern China, Guangzhou, China
| | - Jun Guo
- Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
- State Key Laboratory of Applied Microbiology Southern China, Guangzhou, China
| | - Guoping Sun
- Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Chunjie Zhu
- Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Fusheng Chen
- College of Food Science and Technology, Henan University of Technology, Zhengzhou, China
| | - Yonggang Yang
- Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
- State Key Laboratory of Applied Microbiology Southern China, Guangzhou, China
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangzhou, China
| | - Meiying Xu
- Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
- State Key Laboratory of Applied Microbiology Southern China, Guangzhou, China
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Song D, Chen X, Xu M, Hai R, Zhou A, Tian R, Van Nostrand JD, Kempher ML, Guo J, Sun G, Zhou J. Adaptive Evolution of Sphingobium hydrophobicum C1 T in Electronic Waste Contaminated River Sediment. Front Microbiol 2019; 10:2263. [PMID: 31632374 PMCID: PMC6783567 DOI: 10.3389/fmicb.2019.02263] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 09/17/2019] [Indexed: 11/13/2022] Open
Abstract
Electronic waste (e-waste) has caused a severe worldwide pollution problem. Despite increasing isolation of degradative microorganisms from e-waste contaminated environments, the mechanisms underlying their adaptive evolution in such habitats remain unclear. Sphingomonads generally have xenobiotic-degrading ability and may play important roles in bioremediation. Sphingobium hydrophobicum C1T, characterized with superior cell surface hydrophobicity, was recently isolated from e-waste contaminated river sediment. To dissect the mechanisms driving its adaptive evolution, we evaluated its stress resistance, sequenced its genome and performed comparative genomic analysis with 19 other Sphingobium strains. Strain C1T can feed on several kinds of e-waste-derived xenobiotics, exhibits a great resistance to heavy metals and possesses a high colonization ability. It harbors abundant genes involved in environmental adaptation, some of which are intrinsic prior to experiencing e-waste contamination. The extensive genomic variations between strain C1T and other Sphingobium strains, numerous C1T-unique genes, massive mobile elements and frequent genome rearrangements reflect a high genome plasticity. Positive selection, gene duplication, and especially horizontal gene transfer drive the adaptive evolution of strain C1T. Moreover, presence of type IV secretion systems may allow strain C1T to be a source of beneficial genes for surrounding microorganisms. This study provides new insights into the adaptive evolution of sphingomonads, and potentially guides bioremediation strategies.
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Affiliation(s)
- Da Song
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China.,State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Xingjuan Chen
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Meiying Xu
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Rong Hai
- Department of Plant Pathology and Microbiology, University of California, Riverside, Riverside, CA, United States
| | - Aifen Zhou
- Institute for Environmental Genomics, Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK, United States
| | - Renmao Tian
- Institute for Environmental Genomics, Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK, United States
| | - Joy D Van Nostrand
- Institute for Environmental Genomics, Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK, United States
| | - Megan L Kempher
- Institute for Environmental Genomics, Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK, United States
| | - Jun Guo
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Guoping Sun
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Jizhong Zhou
- Institute for Environmental Genomics, Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK, United States
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9
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Pan F, Yu Y, Xu A, Xia D, Sun Y, Cai Z, Liu W, Fu J. Application of magnetic OMS-2 in sequencing batch reactor for treating dye wastewater as a modulator of microbial community. JOURNAL OF HAZARDOUS MATERIALS 2017; 340:36-46. [PMID: 28711831 DOI: 10.1016/j.jhazmat.2017.06.062] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 06/06/2017] [Accepted: 06/26/2017] [Indexed: 06/07/2023]
Abstract
The potential and mechanism of synthesized magnetic octahedral molecular sieve (Fe3O4@OMS-2) nanoparticles in enhancing the aerobic microbial ability of sequencing batch reactor (SBR) for treating dye wastewater have been revealed in this study. The addition of Fe3O4@OMS-2 of 0.25g/L enhanced the decolorization of SBRs with an operation cycle of 24h by more than 20%. The 16S rRNA gene high-throughput sequencing indicated Fe3O4@OMS-2 increased the microbial richness and diversity of SBRs, and more importantly, promoted the potential dye-degrading bacteria. After a series of enriching and screening, four bacterial strains with the considerable decolorizing ability were isolated from SBRs, designating Alcaligenes faecalis FP-G1, Bacillus aryabhattai FP-F1, Escherichia fergusonii FP-D1 and Rhodococcus ruber FP-E1, respectively. The growth and decolorization of these pure strains were promoted in the presence of Fe3O4@OMS-2, which agrees with the result of high-throughput sequencing. Monitoring dissolved Fe/Mn ions and investigating the change of oxidation states of Fe/Mn species discovered OMS-2 composition played the critical role in modulating the microbial community. The significant enhancement of Mn-oxidizing/-reducing bacteria suggested microbial Mn redox may be the key action mechanism of Fe3O4@OMS-2, which can provide numerous benefits for the microbial community and decolorization of SBRs.
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Affiliation(s)
- Fei Pan
- School of Environmental Engineering, Wuhan Textile University, Wuhan 430073, China; Engineering Research Centre for Clean Production of Textile Dyeing and Printing, Ministry of Education, Wuhan Textile University, Wuhan 430073, China.
| | - Yang Yu
- School of Environmental Engineering, Wuhan Textile University, Wuhan 430073, China
| | - Aihua Xu
- School of Environmental Engineering, Wuhan Textile University, Wuhan 430073, China
| | - Dongsheng Xia
- School of Environmental Engineering, Wuhan Textile University, Wuhan 430073, China
| | - Youmin Sun
- Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, China
| | - Zhengqing Cai
- Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, China
| | - Wen Liu
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Jie Fu
- Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, China.
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10
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Chen X, Song D, Xu J, Sun G, Xu M. Microbial depassivation of Fe(0) for contaminant removal under semi-aerobic conditions. Appl Microbiol Biotechnol 2017; 101:8595-8605. [PMID: 29018943 DOI: 10.1007/s00253-017-8549-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 09/11/2017] [Accepted: 09/17/2017] [Indexed: 01/23/2023]
Abstract
Increasing evidence has shown that the reaction of zero-valent iron [Fe(0)] by oxygen can produce strong oxidants and rapidly oxidize the tractable contaminants. However, Fe(0) is vulnerable to passivation in the presence of oxygen, which significantly decreases its surface reactivity towards the removal of refractory contaminants. Microorganisms capable of reducing ferric iron in the presence of oxygen are expected to overcome the limitation of Fe(0) passivation. However, no studies to date have shown that microorganisms are able to depassivate Fe(0) for the removal of recalcitrant compounds in the presence of oxygen. In this study, we demonstrated that the carotenoid-producing Sphingobium hydrophobicum C1 was able to significantly enhance the removal of deca-brominated diphenyl ether by depassivating Fe(0) and subsequently removing the newly formed metabolites under semi-aerobic conditions (> 4 mg/L oxygen). S. hydrophobicum C1 effectively depassivated Fe(0) and regenerated its reactivity by reducing ferric iron under semi-aerobic conditions. Some unique characteristics of S. hydrophobicum C1, including the presence of membrane-integrated carotenoids and certain cell proteins, were essential for the ferric iron reduction of S. hydrophobicum C1 in the presence of oxygen. Our results may provide new insights into the bioremediation of persistent pollutants and will contribute to future studies to enhance our understanding of microbial iron reduction.
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Affiliation(s)
- Xingjuan Chen
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, 100 Central Xianlie Road, 510070, Guangzhou, People's Republic of China.,State Key Laboratory of Applied Microbiology Southern China, Guangzhou, 510070, China.,Guangdong Open Laboratory of Applied Microbiology, Guangzhou, 510070, China
| | - Da Song
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, 100 Central Xianlie Road, 510070, Guangzhou, People's Republic of China.,State Key Laboratory of Applied Microbiology Southern China, Guangzhou, 510070, China.,Guangdong Open Laboratory of Applied Microbiology, Guangzhou, 510070, China
| | - Jingjing Xu
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, 100 Central Xianlie Road, 510070, Guangzhou, People's Republic of China.,State Key Laboratory of Applied Microbiology Southern China, Guangzhou, 510070, China.,Guangdong Open Laboratory of Applied Microbiology, Guangzhou, 510070, China
| | - Guoping Sun
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, 100 Central Xianlie Road, 510070, Guangzhou, People's Republic of China.,State Key Laboratory of Applied Microbiology Southern China, Guangzhou, 510070, China.,Guangdong Open Laboratory of Applied Microbiology, Guangzhou, 510070, China
| | - Meiying Xu
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, 100 Central Xianlie Road, 510070, Guangzhou, People's Republic of China. .,State Key Laboratory of Applied Microbiology Southern China, Guangzhou, 510070, China. .,Guangdong Open Laboratory of Applied Microbiology, Guangzhou, 510070, China.
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11
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Liu YN, Zhang F, Li J, Li DB, Liu DF, Li WW, Yu HQ. Exclusive Extracellular Bioreduction of Methyl Orange by Azo Reductase-Free Geobacter sulfurreducens. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:8616-8623. [PMID: 28671824 DOI: 10.1021/acs.est.7b02122] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Azo dyes are a class of recalcitrant organic pollutants causing severe environmental pollution. For their biodecolorization, the azo reductase system was considered as the major molecular basis in bacteria. However, the intracellular localization of azo reductase limits their function for efficient azo dye decolorization. This limitation may be circumvented by electrochemically active bacteria (EAB) which is capable of extracellular respiration. To verify the essential role of extracellular respiration in azo dye decolorization, Geobacter sulfurreducens PCA, a model EAB, was used for the bioreduction of methyl orange (MO), a typical azo dye. G. sulfurreducens PCA efficiently reduced MO into amines. Kinetic results showed that G. sulfurreducens PCA had the highest decolorization efficiency among the currently known MO reducing bacteria. Electrons from acetate oxidization by this strain were transferred by the respiratory chain to MO. The mass and electron balances, fluorescent probing and proteinase K treatment experimental results indicate that the biodecolorization of MO by G. sulfurreducens PCA is an exclusive extracellular process. OmcB, OmcC and OmcE were identified as the key outer-membrane proteins for the extracellular MO reduction. This work deepens our understanding of EAB physiology and is useful for the decontamination of environments polluted with azo dyes. The contribution of extracellular respiration to pollutants reduction will broaden the environmental applications of EAB.
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Affiliation(s)
- Yi-Nan Liu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China , Hefei, 230026, China
| | - Feng Zhang
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China , Hefei, 230026, China
| | - Jie Li
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China , Hefei, 230026, China
| | - Dao-Bo Li
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China , Hefei, 230026, China
| | - Dong-Feng Liu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China , Hefei, 230026, China
| | - Wen-Wei Li
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China , Hefei, 230026, China
| | - Han-Qing Yu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China , Hefei, 230026, China
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12
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Cai Z, Sun Y, Liu W, Pan F, Sun P, Fu J. An overview of nanomaterials applied for removing dyes from wastewater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:15882-15904. [PMID: 28477250 DOI: 10.1007/s11356-017-9003-8] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2016] [Accepted: 04/07/2017] [Indexed: 05/28/2023]
Abstract
Organic dyes are one of the most commonly discharged pollutants in wastewaters; however, many conventional treatment methods cannot treat them effectively. Over the past few decades, we have witnessed rapid development of nanotechnologies, which offered new opportunities for developing innovative methods to treat dye-contaminated wastewater with low price and high efficiency. The large surface area, modified surface properties, unique electron conduction properties, etc. offer nanomaterials with excellent performances in dye-contaminated wastewater treatment. For examples, the agar-modified monometallic/bimetallic nanoparticles have the maximum methylene blue adsorption capacity of 875.0 mg/g, which are several times higher than conventional adsorbents. Among various nanomaterials, the carbonaceous nanomaterials, nano-sized TiO2, and graphitic carbon nitride (g-C3N4) are considered as the most promising nanomaterials for removing dyes from water phase. However, some challenges, such as high cost and poor separation performance, still limit their engineering application. This article reviewed the recent advances in the nanomaterials used for dye removal via adsorption, photocatalytic degradation, and biological treatment. The modification methods for improving the effectiveness of nanomaterials are highlighted. Finally, the current knowledge gaps of developing nanomaterials on the environmental application were discussed, and the possible further research direction is proposed.
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Affiliation(s)
- Zhengqing Cai
- Department of Environmental Science and Engineering, Fudan University, Shanghai, 200433, China
| | - Youmin Sun
- Department of Environmental Science and Engineering, Fudan University, Shanghai, 200433, China
| | - Wen Liu
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
| | - Fei Pan
- School of Environmental Engineering, Wuhan Textile University, Wuhan, 430073, China
| | - Peizhe Sun
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China
| | - Jie Fu
- Department of Environmental Science and Engineering, Fudan University, Shanghai, 200433, China.
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Qu Y, Shen W, Pei X, Ma F, You S, Li S, Wang J, Zhou J. Biosynthesis of gold nanoparticles by Trichoderma sp. WL-Go for azo dyes decolorization. J Environ Sci (China) 2017; 56:79-86. [PMID: 28571873 DOI: 10.1016/j.jes.2016.09.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 08/22/2016] [Accepted: 09/07/2016] [Indexed: 06/07/2023]
Abstract
Developing an eco-friendly approach for metallic nanoparticles synthesis is important in current nanotechnology research. In this study, green synthesis of gold nanoparticles (AuNPs) was carried out by a newly isolated strain Trichoderma sp. WL-Go. UV-vis spectra of AuNPs showed a surface plasmon resonance peak at 550nm, and transmission electron microscopy images revealed that the AuNPs were of varied shape with well dispersibility. The optimal conditions for AuNPs synthesis were HAuCl4 1.0mmol/L, biomass 0.5g and pH7-11. Moreover, the bio-AuNPs could efficiently catalyze the decolorization of various azo dyes. This research provided a new microbial resource candidate for green synthesis of AuNPs and demonstrated the potential application of bio-AuNPs for azo dye decolorization.
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Affiliation(s)
- Yuanyuan Qu
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
| | - Wenli Shen
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Xiaofang Pei
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Fang Ma
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Shengnan You
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Shuzhen Li
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Jingwei Wang
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Jiti Zhou
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
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