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Ge H, Liu X, Lu D, Yang Z, Li H. Degradation of pyrene by Xanthobacteraceae bacterium strain S3 isolated from the rhizosphere sediment of Vallisneria natans: active conditions, metabolite identification, and proposed pathways. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:25659-25670. [PMID: 38483714 DOI: 10.1007/s11356-024-32724-0] [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: 09/17/2023] [Accepted: 02/27/2024] [Indexed: 04/19/2024]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) were typical environmental contaminants that accumulated continuously in sediment. Microbial degradation is the main way of PAH degradation in the natural environment. Therefore, expanding the available pool of microbial resources and investigating the molecular degrading mechanisms of PAHs are critical to the efficient control of PAH-polluted sites. Here, a strain (identified as Xanthobacteraceae bacterium) with the ability to degrade pyrene was screened from the rhizosphere sediment of Vallisneria natans. Response surface analysis showed that the strain could degrade pyrene at pH 5-7, NaCl addition 0-1.5%, and temperature 25-40 °C, and the maximum pyrene degradation (~ 95.4%) was obtained under the optimum conditions (pH 7.0, temperature 28.5 °C, and NaCl-free addition) after 72 h. Also, it was observed that the effect of temperature on the degradation ratio was the most significant. Furthermore, eighteen metabolites were identified by mass spectrometry, among which (2Z)-2-hydroxy-3-(4-oxo-4H-phenalen-3-yl) prop-2-enoic acid, 7-(carboxymethyl)-8-formyl-1-naphthyl acetic acid, phthalic acid, naphthalene-1,2-diol, and phenol were the main metabolites. And the degradation pathway of pyrene was proposed, suggesting that pyrene undergoes initial ortho-cleavage under the catalysis of metapyrocatechase to form (2Z)-2-hydroxy-3-(4-oxo-4H-phenalen-3-yl) prop-2-enoic acid. Subsequently, this intermediate was progressively oxidized and degraded to phthalic acid or phenol, which could enter the tricarboxylic acid cycle. Furthermore, the pyrene biodegradation by the strain followed the first-order kinetic model and the degradation rate changed from fast to slow, with the rate remaining mostly slow in the later stages. The slow biodegradation rate was probably caused by a significant amount of phenol accumulation in the initial stage of degradation, which resulted in a decrease in bacterial activity or death.
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Affiliation(s)
- Huanying Ge
- Center for Environment and Water Resources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, People's Republic of China
- Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety, Changsha, 410083, People's Republic of China
| | - Xinghao Liu
- Center for Environment and Water Resources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, People's Republic of China
- Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety, Changsha, 410083, People's Republic of China
| | - Denglong Lu
- Center for Environment and Water Resources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, People's Republic of China
- Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety, Changsha, 410083, People's Republic of China
| | - Zhaoguang Yang
- Center for Environment and Water Resources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, People's Republic of China
- Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety, Changsha, 410083, People's Republic of China
| | - Haipu Li
- Center for Environment and Water Resources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, People's Republic of China.
- Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety, Changsha, 410083, People's Republic of China.
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Ni S, Lv W, Ji Z, Wang K, Mei Y, Li Y. Progress of Crude Oil Gasification Technology Assisted by Microorganisms in Reservoirs. Microorganisms 2024; 12:702. [PMID: 38674646 PMCID: PMC11051786 DOI: 10.3390/microorganisms12040702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Revised: 03/17/2024] [Accepted: 03/26/2024] [Indexed: 04/28/2024] Open
Abstract
Crude oil gasification bacteria, including fermenting bacteria, hydrocarbon-oxidizing bacteria, reducing bacteria, and methanogenic bacteria, participate in multi-step reactions involving initial activation, intermediate metabolism, and the methanogenesis of crude oil hydrocarbons. These bacteria degrade crude oil into smaller molecules such as hydrogen, carbon dioxide, acetic acid, and formic acid. Ultimately, they convert it into methane, which can be utilized or stored as a strategic resource. However, the current challenges in crude oil gasification include long production cycles and low efficiency. This paper provides a summary of the microbial flora involved in crude oil gasification, the gasification metabolism pathways within reservoirs, and other relevant information. It specifically focuses on analyzing the factors that affect the efficiency of crude oil gasification metabolism and proposes suggestions for improving this efficiency. These studies deepen our understanding of the potential of reservoir ecosystems and provide valuable insights for future reservoir development and management.
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Affiliation(s)
- Shumin Ni
- University of Chinese Academy of Sciences, Beijing 100049, China; (S.N.); (K.W.); (Y.M.); (Y.L.)
- Institute of Porous Flow & Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, China;
| | - Weifeng Lv
- Institute of Porous Flow & Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, China;
- State Key Laboratory of Enhanced Oil Recovery, Research Institute of Petroleum Exploration and Development, CNPC, Beijing 100083, China
| | - Zemin Ji
- Institute of Porous Flow & Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, China;
| | - Kai Wang
- University of Chinese Academy of Sciences, Beijing 100049, China; (S.N.); (K.W.); (Y.M.); (Y.L.)
- Institute of Porous Flow & Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, China;
| | - Yuhao Mei
- University of Chinese Academy of Sciences, Beijing 100049, China; (S.N.); (K.W.); (Y.M.); (Y.L.)
- Institute of Porous Flow & Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, China;
| | - Yushu Li
- University of Chinese Academy of Sciences, Beijing 100049, China; (S.N.); (K.W.); (Y.M.); (Y.L.)
- Institute of Porous Flow & Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, China;
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Zhu H, Gong L, Wang R, Shao Z. The Effects and Toxicity of Different Pyrene Concentrations on Escherichia coli Using Transcriptomic Analysis. Microorganisms 2024; 12:326. [PMID: 38399729 PMCID: PMC10892627 DOI: 10.3390/microorganisms12020326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 01/28/2024] [Accepted: 02/02/2024] [Indexed: 02/25/2024] Open
Abstract
Pyrene is a pollutant in the environment and affects the health of living organisms. It is important to understand microbial-mediated pyrene resistance and the related molecular mechanisms due to its toxicity and biodegradability. Due to the unclear response mechanisms of bacteria to PAHs, this study detected the transcriptional changes in Escherichia coli under different pyrene concentrations using transcriptome sequencing technology. Global transcriptome analysis showed that the number of differentially expressed genes (DEGs) in multiple metabolic pathways increased with increasing concentrations of pyrene. In addition, the effects and toxicity of pyrene on Escherichia coli mainly included the up-regulation and inhibition of genes related to carbohydrate metabolism, membrane transport, sulfate reduction, various oxidoreductases, and multidrug efflux pumps. Moreover, we also constructed an association network between significantly differentially expressed sRNAs and key genes and determined the regulatory relationship and key genes of Escherichia coli under pyrene stress. Our study utilized pyrene as an exogenous stress substance to investigate the possible pathways of the bacterial stress response. In addition, this study provides a reference for other related research and serves as a foundation for future research.
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Affiliation(s)
- Han Zhu
- Key Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China (R.W.)
- State Key Laboratory Breeding Base of Marine Genetic Resources, Xiamen 361005, China
| | - Linfeng Gong
- Key Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China (R.W.)
- State Key Laboratory Breeding Base of Marine Genetic Resources, Xiamen 361005, China
| | - Ruicheng Wang
- Key Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China (R.W.)
- State Key Laboratory Breeding Base of Marine Genetic Resources, Xiamen 361005, China
| | - Zongze Shao
- Key Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China (R.W.)
- State Key Laboratory Breeding Base of Marine Genetic Resources, Xiamen 361005, China
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Wang M, Zhang W, He T, Rong L, Yang Q. Degradation of polycyclic aromatic hydrocarbons in aquatic environments by a symbiotic system consisting of algae and bacteria: green and sustainable technology. Arch Microbiol 2023; 206:10. [PMID: 38059992 DOI: 10.1007/s00203-023-03734-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/27/2023] [Accepted: 11/04/2023] [Indexed: 12/08/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are genotoxic, carcinogenic, and persistent in the environment and are therefore of great concern in the environmental protection field. Due to the inherent recalcitrance, persistence and nonreactivity of PAHs, they are difficult to remediate via traditional water treatment methods. In recent years, microbial remediation has been widely used as an economical and environmentally friendly degradation technology for the treatment of PAH-contaminated water. Various bacterial and microalgal strains are capable of potentially degrading or transforming PAHs through intrinsic metabolic pathways. However, their biodegradation potential is limited by the cytotoxic effects of petroleum hydrocarbons, unfavourable environmental conditions, and biometabolic limitations. To address this limitation, microbial communities, biochemical pathways, enzyme systems, gene organization, and genetic regulation related to PAH degradation have been intensively investigated. The advantages of algal-bacterial cocultivation have been explored, and the limitations of PAHs degradation by monocultures of algae or bacteria have been overcome by algal-bacterial interactions. Therefore, a new model consisting of a "microalgal-bacterial consortium" is becoming a new management strategy for the effective degradation and removal of PAHs. This review first describes PAH pollution control technologies (physical remediation, chemical remediation, bioremediation, etc.) and proposes an algal-bacterial symbiotic system for the degradation of PAHs by analysing the advantages, disadvantages, and PAH degradation performance in this system to fill existing research gaps. Additionally, an algal-bacterial system is systematically developed, and the effects of environmental conditions are explored to optimize the degradation process and improve its technical feasibility. The aim of this paper is to provide readers with an effective green and sustainable remediation technology for removing PAHs from aquatic environments.
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Affiliation(s)
- Mengying Wang
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences (Beijing), Beijing, 100083, People's Republic of China
| | - Wenqing Zhang
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences (Beijing), Beijing, 100083, People's Republic of China
| | - Tao He
- College of Environmental Science and Engineering, Dalian Maritime University, Dalian, 116026, China
| | - Lingyun Rong
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences (Beijing), Beijing, 100083, People's Republic of China
| | - Qi Yang
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences (Beijing), Beijing, 100083, People's Republic of China.
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Silva NM, Romagnoli CL, Santiago CRDN, de Lacerda JPA, Leão SC, Digiampietri LA, Viana-Niero C. Multi-Approach Characterization of Novel Pyrene-Degrading Mycolicibacterium austroafricanum Isolates Lacking nid Genes. Microorganisms 2023; 11:1413. [PMID: 37374915 DOI: 10.3390/microorganisms11061413] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 05/21/2023] [Accepted: 05/22/2023] [Indexed: 06/29/2023] Open
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are chemical compounds that are widespread in the environment, arising from the incomplete combustion of organic material, as well as from human activities involving petrol exploitation, petrochemical industrial waste, gas stations, and environmental disasters. PAHs of high molecular weight, such as pyrene, have carcinogenic and mutagenic effects and are considered pollutants. The microbial degradation of PAHs occurs through the action of multiple dioxygenase genes (nid), which are localized in genomic island denominate region A, and cytochrome P450 monooxygenases genes (cyp) dispersed in the bacterial genome. This study evaluated pyrene degradation by five isolates of Mycolicibacterium austroafricanum using 2,6-dichlorophenol indophenol (DCPIP assay), gas chromatography/mass spectrometry (CG/MS), and genomic analyses. Two isolates (MYC038 and MYC040) exhibited pyrene degradation indexes of 96% and 88%, respectively, over a seven-day incubation period. Interestingly, the genomic analyses showed that the isolates do not have nid genes, which are involved in PAH biodegradation, despite their ability to degrade pyrene, suggesting that degradation may occur due to the presence of cyp150 genes, or even genes that have not yet been described. To the best of our knowledge, this is the first report of isolates without nid genes demonstrating the ability to degrade pyrene.
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Affiliation(s)
- Natalia Maria Silva
- Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo, São Paulo 04023-901, Brazil
| | - Camila Lopes Romagnoli
- Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo, São Paulo 04023-901, Brazil
| | | | - João Paulo Amorim de Lacerda
- Laboratory of Chemistry and Manufactured Products, Institute of Technological Research, São Paulo 05508-901, Brazil
| | - Sylvia Cardoso Leão
- Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo, São Paulo 04023-901, Brazil
| | | | - Cristina Viana-Niero
- Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo, São Paulo 04023-901, Brazil
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Lou F, Okoye CO, Gao L, Jiang H, Wu Y, Wang Y, Li X, Jiang J. Whole-genome sequence analysis reveals phenanthrene and pyrene degradation pathways in newly isolated bacteria Klebsiella michiganensis EF4 and Klebsiella oxytoca ETN19. Microbiol Res 2023; 273:127410. [PMID: 37178499 DOI: 10.1016/j.micres.2023.127410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 05/05/2023] [Accepted: 05/09/2023] [Indexed: 05/15/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are diverse pollutants of significant environmental concerns, requiring effective biodegradation. This study used different bioinformatics tools to conduct whole-genome sequencing of two novel bacterial strains, Klebsiella michiganensis EF4 and K. oxytoca ETN19, to improve our understanding of their many genomic functions and degradation pathways of phenanthrene and pyrene. After 28 days of cultivation, strain EF4 degraded approximately 80% and 60% of phenanthrene and pyrene, respectively. However, their combinations (EF4 +ETN19) showed tremendous phenanthrene degradation efficiency, supposed to be at the first-level kinetic model with a t1/2 value of approximately 6 days. In addition, the two bacterial genomes contained carbohydrate-active enzymes and secondary metabolites biosynthetic gene clusters associated with PAHs degradation. The two genomes contained the bZIP superfamily of transcription factors, primarily the cAMP-response element-binding protein (CREB), which could regulate the expression of several PAHs degradation genes and enzymes. Interestingly, the two genomes were found to uniquely degrade phenanthrene through a putative pathway that catabolizes 2-carboxybenzalpyruvate into the TCA cycle. An operon containing multicomponent proteins, including a novel gene (JYK05_14550) that could initiate the beginning step of phenanthrene and pyrene degradation, was found in the EF4 genome. However, the degradation pathway of ETN19 showed that the yhfP gene encoding putative quinone oxidoreductase was associated with phenanthrene and pyrene catabolic processes. Furthermore, the significant expression of catechol 1,2-dioxygenase and quinone oxidoreductase genes in EF4 +ETN19 and ETN19 following the quantitative reverse transcription polymerase chain reaction (qRT-PCR) analysis confirmed the ability of the bacteria combination to degrade pyrene and phenanthrene effectively. These findings present new insight into the possible co-metabolism of the two bacterial species in the rapid biodegradation of phenanthrene and pyrene in soil environments.
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Affiliation(s)
- Feiyue Lou
- Biofuels Institute, Jiangsu University, Zhenjiang 212013, China; School of Environment & Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Charles Obinwanne Okoye
- Biofuels Institute, Jiangsu University, Zhenjiang 212013, China; School of Environment & Safety Engineering, Jiangsu University, Zhenjiang 212013, China; Department of Zoology & Environmental Biology, University of Nigeria, Nsukka 410001, Nigeria
| | - Lu Gao
- Biofuels Institute, Jiangsu University, Zhenjiang 212013, China; School of Environment & Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Huifang Jiang
- Biofuels Institute, Jiangsu University, Zhenjiang 212013, China; School of Environment & Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Yanfang Wu
- Biofuels Institute, Jiangsu University, Zhenjiang 212013, China; School of Environment & Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Yongli Wang
- Biofuels Institute, Jiangsu University, Zhenjiang 212013, China; School of Environment & Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Xia Li
- Biofuels Institute, Jiangsu University, Zhenjiang 212013, China; School of Environment & Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Jianxiong Jiang
- Biofuels Institute, Jiangsu University, Zhenjiang 212013, China; School of Environment & Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
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7
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Chen C, Zhang Z, Xu P, Hu H, Tang H. Anaerobic biodegradation of polycyclic aromatic hydrocarbons. ENVIRONMENTAL RESEARCH 2023; 223:115472. [PMID: 36773640 DOI: 10.1016/j.envres.2023.115472] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 01/25/2023] [Accepted: 02/08/2023] [Indexed: 06/18/2023]
Abstract
Although many anaerobic microorganisms that can degrade PAHs have been harnessed, there is still a large gap between laboratory achievements and practical applications. Here, we review the recent advances in the biodegradation of PAHs under anoxic conditions and highlight the mechanistic insights into the metabolic pathways and functional genes. Achievements of practical application and enhancing strategies of anaerobic PAHs bioremediation in soil were summarized. Based on the concerned issues during research, perspectives of further development were proposed including time-consuming enrichment, byproducts with unknown toxicity, and activity inhibition with low temperatures. In addition, meta-omics, synthetic biology and engineering microbiome of developing microbial inoculum for anaerobic bioremediation applications are discussed. We anticipate that integrating the theoretical research on PAHs anaerobic biodegradation and its successful application will advance the development of anaerobic bioremediation.
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Affiliation(s)
- Chao Chen
- College of Life Science, Dalian Minzu University, Dalian, 116600, Liaoning, China; State Key Laboratory of Microbial Metabolism, and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Zhan Zhang
- China Tobacco Henan Industrial Co. Ltd., Zhengzhou, 450000, China
| | - Ping Xu
- State Key Laboratory of Microbial Metabolism, and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Haiyang Hu
- State Key Laboratory of Microbial Metabolism, and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China.
| | - Hongzhi Tang
- State Key Laboratory of Microbial Metabolism, and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China.
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Syed Abd Halim SNQ, Mohd Nazri NA, Md Nordin NAH. Comparative Effects of Graphitic Carbon Nitride Precursors on the Photocatalytic Degradation of Pyrene. MATERIALS SCIENCE FORUM 2022; 1076:181-191. [DOI: 10.4028/p-y056c4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Pyrene is a ubiquitous, persistent, and mutagenic pollutant that belongs to the polycyclic aromatic hydrocarbons. Graphitic carbon nitride (g-C3N4) has emerged as a promising photocatalyst for degradation of various pollutants in water and wastewater treatment due to its unique band structure and excellent physiochemical stability. This paper presents the comparative study of composites g-C3N4 from various combinations of precursors using thermal polycondensation at 600 °C. Comparative experiments revealed that the preparation conditions of both precursors and the mass ratios of precursor influenced the overall performance of photocatalyst during photocatalytic degradation of pyrene. Experimental results indicated that the best performance of composites g-C3N4t photocatalyst was prepared from a wet mixture of dicyandiamide and guanidine carbonate precursors at a mass ratio of 1:1 with 43.9 % pyrene degradation under visible light irradiation for 240 mins. The reusability of the best g-C3N4 composites for the photocatalytic degradation of pyrene was also investigated. It was found that the prepared photocatalyst was stable up to five cycles of photocatalysis. Meanwhile, holes (h+) and hydroxyl radicals (·OH) were identified as the primary and secondary dominant reactive species in the photocatalytic degradation through scavenging trapping experiments.
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Affiliation(s)
| | - Noor Aina Mohd Nazri
- Universiti Kuala Lumpur Branch Campus Malaysian Institute of Chemical and Bioengineering Technology (UniKL MICET)
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Wang W, Wang X, Zhang H, Shi Q, Liu H. Rhamnolipid-Enhanced ZVI-Activated Sodium Persulfate Remediation of Pyrene-Contaminated Soil. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:11518. [PMID: 36141785 PMCID: PMC9517034 DOI: 10.3390/ijerph191811518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 09/06/2022] [Accepted: 09/07/2022] [Indexed: 06/16/2023]
Abstract
In soil, polycyclic aromatic hydrocarbons (PAHs) are tightly bound to organic components, but surfactants can effectively transform them from a solid to a liquid phase. In this study, the biosurfactant rhamnolipid (RL) was selected as the eluent; shaking elution in a thermostatic oscillator improved the elution rate of pyrene, and the effects of RL concentration, temperature, and elution time on the elution effect were compared. After four repeated washings, the maximum elution rate was 75.6% at a rhamnolipid concentration of 20 g/L and a temperature of 45 °C. We found that 38 μm Zero-Valent Iron (ZVI) had a higher primary reaction rate (0.042 h-1), with a degradation rate of 94.5% when 3 g/L ZVI was added to 21 mM Na2S2O8 at 60 °C. Finally, electron paramagnetic resonance (EPR) detected DMPO-OH and DMPO-SO4 signals, which played a major role in the degradation of pyrene. Overall, these results show that the combination of rhamnolipid elution and persulfate oxidation system effectively remediated pyrene-contaminated soil and provides some implications for the combined remediation with biosurfactants and chemical oxidation.
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Affiliation(s)
- Wenyang Wang
- College of Ecology and Environment, Xinjiang University, Urumqi 830046, China
- Xinjiang Key Laboratory of Oasis Ecology, Urumqi 830046, China
| | - Xiyuan Wang
- College of Ecology and Environment, Xinjiang University, Urumqi 830046, China
- Xinjiang Key Laboratory of Oasis Ecology, Urumqi 830046, China
| | - Hao Zhang
- Department of Construction and Environmental Chemical Engineering, Yanshan University Liren College, Qinhuangdao 066004, China
| | - Qingdong Shi
- College of Ecology and Environment, Xinjiang University, Urumqi 830046, China
- Xinjiang Key Laboratory of Oasis Ecology, Urumqi 830046, China
| | - Huapeng Liu
- College of Ecology and Environment, Xinjiang University, Urumqi 830046, China
- Xinjiang Key Laboratory of Oasis Ecology, Urumqi 830046, China
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10
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A Review of Pyrene Bioremediation Using Mycobacterium Strains in a Different Matrix. FERMENTATION 2022. [DOI: 10.3390/fermentation8060260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Polycyclic aromatic hydrocarbons are compounds with 2 or more benzene rings, and 16 of them have been classified as priority pollutants. Among them, pyrene has been found in higher concentrations than recommended, posing a threat to the ecosystem. Many bacterial strains have been identified as pyrene degraders. Most of them belong to Gram-positive strains such as Mycobacterium sp. and Rhodococcus sp. These strains were enriched and isolated from several sites contaminated with petroleum products, such as fuel stations. The bioremediation of pyrene via Mycobacterium strains is the main objective of this review. The scattered data on the degradation efficiency, formation of pyrene metabolites, bio-toxicity of pyrene and its metabolites, and proposed degradation pathways were collected in this work. The study revealed that most of the Mycobacterium strains were capable of degrading pyrene efficiently. The main metabolites of pyrene were 4,5-dihydroxy pyrene, phenanthrene-4,5-dicarboxylate, phthalic acid, and pyrene-4,5-dihydrodiol. Some metabolites showed positive results for the Ames mutagenicity prediction test, such as 1,2-phenanthrenedicarboxylic acid, 1-hydroxypyrene, 4,5-dihydropyrene, 4-phenanthrene-carboxylic acid, 3,4-dihydroxyphenanthrene, monohydroxy pyrene, and 9,10-phenanthrenequinone. However, 4-phenanthrol showed positive results for experimental and prediction tests. This study may contribute to enhancing the bioremediation of pyrene in a different matrix.
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Edgcomb VP, Teske AP, Mara P. Microbial Hydrocarbon Degradation in Guaymas Basin-Exploring the Roles and Potential Interactions of Fungi and Sulfate-Reducing Bacteria. Front Microbiol 2022; 13:831828. [PMID: 35356530 PMCID: PMC8959706 DOI: 10.3389/fmicb.2022.831828] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 02/04/2022] [Indexed: 11/13/2022] Open
Abstract
Hydrocarbons are degraded by specialized types of bacteria, archaea, and fungi. Their occurrence in marine hydrocarbon seeps and sediments prompted a study of their role and their potential interactions, using the hydrocarbon-rich hydrothermal sediments of Guaymas Basin in the Gulf of California as a model system. This sedimented vent site is characterized by localized hydrothermal circulation that introduces seawater sulfate into methane- and hydrocarbon-rich sediments, and thus selects for diverse hydrocarbon-degrading communities of which methane, alkane- and aromatics-oxidizing sulfate-reducing bacteria and archaea have been especially well-studied. Current molecular and cultivation surveys are detecting diverse fungi in Guaymas Basin hydrothermal sediments, and draw attention to possible fungal-bacterial interactions. In this Hypothesis and Theory article, we report on background, recent results and outcomes, and underlying hypotheses that guide current experiments on this topic in the Edgcomb and Teske labs in 2021, and that we will revisit during our ongoing investigations of bacterial, archaeal, and fungal communities in the deep sedimentary subsurface of Guaymas Basin.
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Affiliation(s)
| | - Andreas P. Teske
- Department of Earth, Marine and Environmental Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Paraskevi Mara
- Woods Hole Oceanographic Institution, Woods Hole, MA, United States
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12
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Wu D, Kan H, Zhang Y, Wang T, Qu G, Zhang P, Jia H, Sun H. Pyrene contaminated soil remediation using microwave/magnetite activated persulfate oxidation. CHEMOSPHERE 2022; 286:131787. [PMID: 34365168 DOI: 10.1016/j.chemosphere.2021.131787] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 07/29/2021] [Accepted: 08/02/2021] [Indexed: 06/13/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are important mutagen prevalent in the contaminated sites, bringing potential risks to human health. Iron oxides are important natural components in soils. Pyrene removal in soil using persulfate (PS) oxidation activated by microwave (MW) and magnetite (Fe3O4) was investigated. Fe3O4 significantly promoted pyrene removal in the soil; 91.7 % of pyrene was degraded within 45 min treatment. Pyrene removal rate in the Fe3O4/MW/PS system was 5.18 and 3.00 times higher than that in the Fe3O4/PS and MW/PS systems. Increasing in Fe3O4 dosage, PS concentration, MW temperature, and soil moisture content in the selected range were conducive for pyrene degradation. SO4•-, •OH, O2•-, and 1O2 were responsible for pyrene degradation, and the conversion of Fe (Ⅱ) in the Fe3O4 to Fe (Ⅲ) contributed to the formation of O2•- and 1O2. Characteristic bands of pyrene were more obviously destroyed by the Fe3O4/MW/PS oxidation, in comparison with MW/PS oxidation. Ring hydroxylation and ring-opening reactions were the main degradation pathways of pyrene. The toxicities of the formed byproducts were significantly reduced after treatment. This study provided a promising option for pyrene contaminated soil remediation.
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Affiliation(s)
- Dan Wu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province, 712100, PR China
| | - Hongshuai Kan
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province, 712100, PR China
| | - Ying Zhang
- College of Information Science and Technology, Nanjing Forestry University, Nanjing, 210037, China
| | - Tiecheng Wang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province, 712100, PR China; Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi, 712100, PR China.
| | - Guangzhou Qu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province, 712100, PR China; Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi, 712100, PR China
| | - Peng Zhang
- Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, PR China
| | - Hanzhong Jia
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province, 712100, PR China; Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi, 712100, PR China
| | - Hongwen Sun
- Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, PR China
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13
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Yan Z, Wang L, Yan H, Dong Y, Zhang G, Wu H. Biodegradation potential of polycyclic aromatic hydrocarbons in Taihu Lake sediments. ENVIRONMENTAL TECHNOLOGY 2021; 43:1-9. [PMID: 34319863 DOI: 10.1080/09593330.2021.1961871] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 07/17/2021] [Indexed: 06/13/2023]
Abstract
ABSTRACTTo assess the biodegradation potential of polycyclic aromatic hydrocarbons (PAHs) in sediments, sediment microcosms were constructed with sediments collected from six lake zones with different trophic statuses in Taihu Lake. The presence and concentration of PAH-degrading bacteria (PDB) were estimated by the most probable number (MPN) method. After 85 d of aerobic and anaerobic incubation, spiked PAHs (phenanthrene, pyrene, and benzo[a]pyrene) were partially degraded by indigenous sediment microorganisms. Large differences in PAH degradation were observed depending on the molecular size of the PAHs. The PAH removal efficiency in sediments under aerobic conditions was higher than that under anaerobic conditions. MPN analyses showed a higher abundance of degrading microflora in the high PAH-contaminated sites than in the low PAH-contaminated sites. Moreover, the anaerobic PDB populations in the sediments from the six different sites were much higher than those of aerobic PDB. The PAH biodegradation capability in sediments was associated with the geochemical conditions and bacterial populations. PDB showed a broad spatial distribution, thereby implying that they played an important role in the natural attenuation and cycling of PAHs in Taihu Lake. This work indicates that PAHs remain a concern in Taihu Lake sediments and can provide useful information for further bioremediation of PAH-contaminated sediments.
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Affiliation(s)
- Zaisheng Yan
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, People's Republic of China
| | - Luming Wang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, People's Republic of China
- Department of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing, People's Republic of China
| | - Haifeng Yan
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, People's Republic of China
- Department of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing, People's Republic of China
| | - Yibo Dong
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, People's Republic of China
- College of Urban Construction, Nanjing University of Technology, Nanjing, People's Republic of China
| | - Guoqing Zhang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, People's Republic of China
- College of Urban Construction, Nanjing University of Technology, Nanjing, People's Republic of China
| | - Huifang Wu
- College of Urban Construction, Nanjing University of Technology, Nanjing, People's Republic of China
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14
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Elyamine AM, Kan J, Meng S, Tao P, Wang H, Hu Z. Aerobic and Anaerobic Bacterial and Fungal Degradation of Pyrene: Mechanism Pathway Including Biochemical Reaction and Catabolic Genes. Int J Mol Sci 2021; 22:8202. [PMID: 34360967 PMCID: PMC8347714 DOI: 10.3390/ijms22158202] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 07/19/2021] [Accepted: 07/27/2021] [Indexed: 12/21/2022] Open
Abstract
Microbial biodegradation is one of the acceptable technologies to remediate and control the pollution by polycyclic aromatic hydrocarbon (PAH). Several bacteria, fungi, and cyanobacteria strains have been isolated and used for bioremediation purpose. This review paper is intended to provide key information on the various steps and actors involved in the bacterial and fungal aerobic and anaerobic degradation of pyrene, a high molecular weight PAH, including catabolic genes and enzymes, in order to expand our understanding on pyrene degradation. The aerobic degradation pathway by Mycobacterium vanbaalenii PRY-1 and Mycobactetrium sp. KMS and the anaerobic one, by the facultative bacteria anaerobe Pseudomonas sp. JP1 and Klebsiella sp. LZ6 are reviewed and presented, to describe the complete and integrated degradation mechanism pathway of pyrene. The different microbial strains with the ability to degrade pyrene are listed, and the degradation of pyrene by consortium is also discussed. The future studies on the anaerobic degradation of pyrene would be a great initiative to understand and address the degradation mechanism pathway, since, although some strains are identified to degrade pyrene in reduced or total absence of oxygen, the degradation pathway of more than 90% remains unclear and incomplete. Additionally, the present review recommends the use of the combination of various strains of anaerobic fungi and a fungi consortium and anaerobic bacteria to achieve maximum efficiency of the pyrene biodegradation mechanism.
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Affiliation(s)
- Ali Mohamed Elyamine
- Key Laboratory of Resources and Environmental Microbiology, Department of Biology, Shantou University, Shantou 515063, China; (A.M.E.); (J.K.); (S.M.); (P.T.); (H.W.)
- Department of Life Science, Faculty of Science and Technology, University of Comoros, Moroni 269, Comoros
| | - Jie Kan
- Key Laboratory of Resources and Environmental Microbiology, Department of Biology, Shantou University, Shantou 515063, China; (A.M.E.); (J.K.); (S.M.); (P.T.); (H.W.)
| | - Shanshan Meng
- Key Laboratory of Resources and Environmental Microbiology, Department of Biology, Shantou University, Shantou 515063, China; (A.M.E.); (J.K.); (S.M.); (P.T.); (H.W.)
| | - Peng Tao
- Key Laboratory of Resources and Environmental Microbiology, Department of Biology, Shantou University, Shantou 515063, China; (A.M.E.); (J.K.); (S.M.); (P.T.); (H.W.)
| | - Hui Wang
- Key Laboratory of Resources and Environmental Microbiology, Department of Biology, Shantou University, Shantou 515063, China; (A.M.E.); (J.K.); (S.M.); (P.T.); (H.W.)
| | - Zhong Hu
- Key Laboratory of Resources and Environmental Microbiology, Department of Biology, Shantou University, Shantou 515063, China; (A.M.E.); (J.K.); (S.M.); (P.T.); (H.W.)
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15
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C Campbell B, Gong S, Greenfield P, J Midgley D, T Paulsen I, C George S. Aromatic compound-degrading taxa in an anoxic coal seam microbiome from the Surat Basin, Australia. FEMS Microbiol Ecol 2021; 97:6206826. [PMID: 33791788 DOI: 10.1093/femsec/fiab053] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 03/29/2021] [Indexed: 12/12/2022] Open
Abstract
Methane is an important energy resource internationally, and a large proportion of this methane is produced by microbial communities living in coal seams. Despite the value of this resource for human energy security, our understanding of the metabolic roles played by specific taxa during the biodegradation of coal to methane in situ is quite limited. In order to develop a greater understanding of microbial catabolism on coal, a community from a coal seam in the Surat Basin, Australia, was incubated on 10 different aromatic organic compounds: coronene, benzo[a]pyrene, pyrene, phenanthrene, naphthalene, ethylbenzene, phenol, benzoate, vanillate and syringate. Each of these aromatic compounds either occurs in coal or is a possible product of the coal biodegradation process. 16S rRNA sequencing revealed substantial changes to each community in response to each aromatic carbon substrate provided. Abundant taxa from these substrate-specific communities were identified and their probable catabolic roles proposed based on literature searches of related taxa. This study is the first to link specific coal seam taxa to aromatic substrates available in coal seam environments. Two conceptual models of the putative degradation pathways and key taxa responsible are proposed.
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Affiliation(s)
- Bronwyn C Campbell
- Energy Business Unit, Commonwealth Scientific and Industrial Research Organisation (CSIRO), North Ryde, NSW 2113, Australia.,Department of Earth and Environmental Sciences, Macquarie University, North Ryde, NSW 2109, Australia
| | - Se Gong
- Energy Business Unit, Commonwealth Scientific and Industrial Research Organisation (CSIRO), North Ryde, NSW 2113, Australia
| | - Paul Greenfield
- Energy Business Unit, Commonwealth Scientific and Industrial Research Organisation (CSIRO), North Ryde, NSW 2113, Australia
| | - David J Midgley
- Energy Business Unit, Commonwealth Scientific and Industrial Research Organisation (CSIRO), North Ryde, NSW 2113, Australia
| | - Ian T Paulsen
- Department of Molecular Sciences, Macquarie University, North Ryde, NSW 2109, Australia
| | - Simon C George
- Department of Earth and Environmental Sciences, Macquarie University, North Ryde, NSW 2109, Australia
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16
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Premnath N, Mohanrasu K, Guru Raj Rao R, Dinesh GH, Siva Prakash G, Pugazhendhi A, Jeyakanthan J, Govarthanan M, Kumar P, Arun A. Effect of C/N substrates for enhanced extracellular polymeric substances (EPS) production and Poly Cyclic Aromatic Hydrocarbons (PAHs) degradation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 275:116035. [PMID: 33581631 DOI: 10.1016/j.envpol.2020.116035] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 09/18/2020] [Accepted: 09/20/2020] [Indexed: 05/22/2023]
Abstract
Extracellular Polymeric Substances (EPS) influenced Poly Cyclic Aromatic Hydrocarbons (PAHs) degrading Klebsiella pneumoniae was isolated from the marine environment. To increase the EPS production by Klebsiella pneumoniae, several physicochemical parameters were tweaked such as different carbon sources (arabinose, glucose, glycerol, lactose, lactic acid, mannitol, sodium acetate, starch, and sucrose at 20 g/L), nitrogen sources (ammonium chloride, ammonium sulphate, glycine, potassium nitrate, protease peptone and urea at 2 g/L), different pH, carbon/nitrogen ratio, temperature, and salt concentration were examined. Maximum EPS growth and biodegradation of Anthracene (74.31%), Acenaphthene (67.28%), Fluorene (62.48%), Naphthalene (57.84%), and mixed PAHs (55.85%) were obtained using optimized conditions such as glucose (10 g/L) as carbon source, potassium nitrate (2 g/L) as the nitrogen source at pH 8, growth temperature of 37 °C, 3% NaCl concentration and 72 h incubation period. The Klebsiella pneumoniae biofilm architecture was studied by confocal laser scanning microscopy (CLSM) and scanning electron microscope (SEM). The present study demonstrates the EPS influenced PAHs degradation of Klebsiella pneumoniae.
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Affiliation(s)
- N Premnath
- Department of Energy Science, Alagappa University, Karaikudi, Tamil Nadu, India; Department of Microbiology, Alagappa University, Karaikudi, Tamil Nadu, India
| | - K Mohanrasu
- Department of Energy Science, Alagappa University, Karaikudi, Tamil Nadu, India; Department of Microbiology, Alagappa University, Karaikudi, Tamil Nadu, India
| | - R Guru Raj Rao
- Department of Bioinformatics, Alagappa University, Karaikudi, Tamil Nadu, India
| | - G H Dinesh
- Department of Energy Science, Alagappa University, Karaikudi, Tamil Nadu, India; Department of Microbiology, Alagappa University, Karaikudi, Tamil Nadu, India
| | - G Siva Prakash
- Department of Energy Science, Alagappa University, Karaikudi, Tamil Nadu, India
| | - Arivalagan Pugazhendhi
- Innovative Green Product Synthesis and Renewable Environment Development Research Group, Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho, Chi Minh City, Viet Nam.
| | - J Jeyakanthan
- Department of Bioinformatics, Alagappa University, Karaikudi, Tamil Nadu, India
| | - Muthusamy Govarthanan
- Department of Environmental Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - Ponnuchamy Kumar
- Department of Animal Health and Management, Alagappa University, Karaikudi, Tamil Nadu, India
| | - A Arun
- Department of Microbiology, Alagappa University, Karaikudi, Tamil Nadu, India.
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17
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Cai S, Zhang S, Gao C, Cheng Z. Degradation of fluorescent dye-Solvent Green 7 (HPTS) in wastewater by advanced oxidation process. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2020; 82:2525-2535. [PMID: 33339805 DOI: 10.2166/wst.2020.534] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Solvent Green 7 (HPTS) is a widely used fluorescent dye. As a kind of polycyclic aromatic hydrocarbon (PAHs) derivative, HPTS would cause pollution when it is discharged into the environment. This study adopted advanced oxidation processes (UV/H2O2) to degrade the HPTS in aqueous solution and investigated the effects of various factors on the degradation. The results showed that: the initial concentration and the fluorescence characteristics of HPTS reduced the degradation efficiency. When the oxidant concentration of H2O2 was 3 mg/L, the degradation efficiency and cost of HPTS (20 mg/L) were the most appropriate; when there were various inorganic anions in the solution, the degradations were not affected, but when the solution was strong acid and there existed a lot of chloride ions, the degradation of HPTS was inhibited. The degradation pathways indicated HPTS degraded into naphthalene derivatives, benzene derivatives through oxidation and decarboxylation reactions, finally into water and carbon dioxide. Further research for substances similar to HPTS structure will make progress in understanding the degradation process of PAHs.
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Affiliation(s)
- Shaokang Cai
- School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China E-mail:
| | - Shurong Zhang
- School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China E-mail:
| | - Canzhu Gao
- School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China E-mail:
| | - Zhongfa Cheng
- Shandong Taihe Water Treatment Technologies Co., Ltd, Zaozhuang 277102, China
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18
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Yan B, Luo L, Yang H. Isolation and characterization of Aeromonas sp. TXBc10 capable of high-efficiency degradation of octylphenol polyethoxylate from tannery wastewater. ENVIRONMENTAL TECHNOLOGY 2020; 41:3722-3731. [PMID: 31120337 DOI: 10.1080/09593330.2019.1619842] [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: 11/02/2018] [Accepted: 05/12/2019] [Indexed: 06/09/2023]
Abstract
Octylphenol polyethoxylate (OP n EO) is a potential endocrine-disrupting chemical. Biodegradation of OP n EO was investigated using the bacterium Aeromonas sp. TXBc10 isolated from the influent of tannery waste treatment plant in Hunan Province, China. The bacterium was capable of utilizing OP n EO as the sole source of carbon and energy while OP n EO was degraded under aerobic batch culture conditions. Microbial degradation of OP n EO was studied in batch experiments for optimization of environmental factors. The effect of initial OP n EO concentrations on the degradation was investigated between 100 and 1000 mg·L-1 and the results showed that the biodegradation process conformed to the first-order kinetic model. The optimum pH, temperature, salinity and size of inoculum for OP n EO degradation by Aeromonas sp. TXBc10 was found to be 8.0°C, 30°C, 2.5% and 2.0%, respectively. The major metabolites of OP n EO degradation were identified as short-chain octylphenol polyethoxylate without octylphenol by high-performance liquid chromatography - mass spectrometer, which indicated that sequential cleavage of single ethoxylate units to form OP n- 1EC might be the transformation mechanism of strain TXBc10. Considering that strain TXBc10 exhibits prominent advantage for biodegradation of OP n EO, it might serve as a promising candidate for in situ remediation of OP n EO and compounds with similar structure in tannery wastewater.
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Affiliation(s)
- Binghua Yan
- College of Resources and Environment, Hunan Agricultural University, Changsha, People's Republic of China
- Lab of Waste Valorization and Water Reuse, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, People's Republic of China
| | - Lin Luo
- College of Resources and Environment, Hunan Agricultural University, Changsha, People's Republic of China
| | - Haijun Yang
- College of Plant Protection, Hunan Agricultural University, Changsha, People's Republic of China
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19
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Laczi K, Erdeiné Kis Á, Szilágyi Á, Bounedjoum N, Bodor A, Vincze GE, Kovács T, Rákhely G, Perei K. New Frontiers of Anaerobic Hydrocarbon Biodegradation in the Multi-Omics Era. Front Microbiol 2020; 11:590049. [PMID: 33304336 PMCID: PMC7701123 DOI: 10.3389/fmicb.2020.590049] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 10/26/2020] [Indexed: 12/17/2022] Open
Abstract
The accumulation of petroleum hydrocarbons in the environment substantially endangers terrestrial and aquatic ecosystems. Many microbial strains have been recognized to utilize aliphatic and aromatic hydrocarbons under aerobic conditions. Nevertheless, most of these pollutants are transferred by natural processes, including rain, into the underground anaerobic zones where their degradation is much more problematic. In oxic zones, anaerobic microenvironments can be formed as a consequence of the intensive respiratory activities of (facultative) aerobic microbes. Even though aerobic bioremediation has been well-characterized over the past few decades, ample research is yet to be done in the field of anaerobic hydrocarbon biodegradation. With the emergence of high-throughput techniques, known as omics (e.g., genomics and metagenomics), the individual biodegraders, hydrocarbon-degrading microbial communities and metabolic pathways, interactions can be described at a contaminated site. Omics approaches provide the opportunity to examine single microorganisms or microbial communities at the system level and elucidate the metabolic networks, interspecies interactions during hydrocarbon mineralization. Metatranscriptomics and metaproteomics, for example, can shed light on the active genes and proteins and functional importance of the less abundant species. Moreover, novel unculturable hydrocarbon-degrading strains and enzymes can be discovered and fit into the metabolic networks of the community. Our objective is to review the anaerobic hydrocarbon biodegradation processes, the most important hydrocarbon degraders and their diverse metabolic pathways, including the use of various terminal electron acceptors and various electron transfer processes. The review primarily focuses on the achievements obtained by the current high-throughput (multi-omics) techniques which opened new perspectives in understanding the processes at the system level including the metabolic routes of individual strains, metabolic/electric interaction of the members of microbial communities. Based on the multi-omics techniques, novel metabolic blocks can be designed and used for the construction of microbial strains/consortia for efficient removal of hydrocarbons in anaerobic zones.
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Affiliation(s)
- Krisztián Laczi
- Department of Biotechnology, University of Szeged, Szeged, Hungary
| | - Ágnes Erdeiné Kis
- Department of Biotechnology, University of Szeged, Szeged, Hungary.,Institute of Biophysics, Biological Research Centre, Szeged, Hungary
| | - Árpád Szilágyi
- Department of Biotechnology, University of Szeged, Szeged, Hungary
| | - Naila Bounedjoum
- Department of Biotechnology, University of Szeged, Szeged, Hungary.,Institute of Environmental and Technological Sciences, University of Szeged, Szeged, Hungary
| | - Attila Bodor
- Department of Biotechnology, University of Szeged, Szeged, Hungary.,Institute of Biophysics, Biological Research Centre, Szeged, Hungary.,Institute of Environmental and Technological Sciences, University of Szeged, Szeged, Hungary
| | | | - Tamás Kovács
- Department of Biotechnology, Nanophagetherapy Center, Enviroinvest Corporation, Pécs, Hungary
| | - Gábor Rákhely
- Department of Biotechnology, University of Szeged, Szeged, Hungary.,Institute of Biophysics, Biological Research Centre, Szeged, Hungary.,Institute of Environmental and Technological Sciences, University of Szeged, Szeged, Hungary
| | - Katalin Perei
- Department of Biotechnology, University of Szeged, Szeged, Hungary.,Institute of Environmental and Technological Sciences, University of Szeged, Szeged, Hungary
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