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Gao T, Wang Y, Lai J, Wang F, Yao G, Bao S, Liu J, Wan X, Chen C, Zhang Y, Jiang H, Jiang S, Han P. Effects of nitrile compounds on the structure and function of soil microbial communities as revealed by metagenomes. ENVIRONMENTAL RESEARCH 2024; 261:119700. [PMID: 39074770 DOI: 10.1016/j.envres.2024.119700] [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: 05/10/2024] [Revised: 07/07/2024] [Accepted: 07/26/2024] [Indexed: 07/31/2024]
Abstract
The proliferation of nitrile mixtures has significantly exacerbated environmental pollution. This study employed metagenomic analysis to investigate the short-term effects of nitrile mixtures on soil microbial communities and their metabolic functions. It also examined the responses of indigenous microorganisms and their functional metabolic genes across various land use types to different nitrile stressors. The nitrile compound treatments in this study resulted in an increase in the abundance of Proteobacteria, Actinobacteria, and Firmicutes, while simultaneously reducing overall microbial diversity. The key genes involved in the denitrification process, namely, nirK, nosZ, and hao, were down-regulated, and NO3--N, NO2--N, and NH4+-N concentrations decreased by 7.7%-12.3%, 11.1%-21.3%, and 11.3%-30.9%, respectively. Notably, pond sludge samples exhibited a significant increase in the abundance of nitrogen fixation-related genes nifH, vnfK, vnfH, and vnfG following exposure to nitrile compounds. Furthermore, the fumarase gene fumD, which is responsible for catalyzing fumaric acid into malic acid in the tricarboxylic acid cycle, showed a substantial increase of 7.2-10.6-fold upon nitrile addition. Enzyme genes associated with the catechol pathway, including benB-xylY, dmpB, dmpC, dmpH, and mhpD, displayed increased abundance, whereas genes related to the benzoyl-coenzyme A pathway, such as bcrA, dch, had, oah, and gcdA, were notably reduced. In summary, complex nitrile compounds were found to significantly reduce the species diversity of soil microorganisms. Nitrile-tolerant microorganisms demonstrated the ability to degrade and adapt to nitrile pollutants by enhancing functional enzymes involved in the catechol pathway and fenugreek conversion pathway. This study offers insights into the specific responses of microorganisms to compound nitrile contamination, as well as valuable information for screening nitrile-degrading microorganisms and identifying nitrile metabolic enzymes.
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Affiliation(s)
- Ting Gao
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China; State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - Yiwang Wang
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China; State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - Jinlong Lai
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Fuli Wang
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - Ge Yao
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - Shaoheng Bao
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - Jiajia Liu
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - Xiukun Wan
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - Chang Chen
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - Yunfei Zhang
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - Hui Jiang
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - Shijie Jiang
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China.
| | - Penggang Han
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China.
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2
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Bao W, Gu G, Wu J, Gu YC, Zhao Y. Detection and Identification of Nitrile Compounds via Recognition-Enabled Chromatographic 19F NMR. Anal Chem 2024; 96:4463-4468. [PMID: 38462969 DOI: 10.1021/acs.analchem.3c04909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
The surge in applications of nitrile compounds across diverse fields, such as pharmaceuticals, agrochemicals, dyes, and functional materials, necessitates the development of rapid and efficient detection and identification methods. In this study, we introduce a chemosensing strategy employing a novel 19F-labeled probe, facilitating swift and accurate analysis of a broad spectrum of nitrile-containing analytes. This approach leverages the reversible interaction between the 19F-labeled probe and the analytes to produce chromatogram-like outputs, ensuring the precise identification of various pharmaceuticals and pesticides within complex matrices. Additionally, this dynamic system offers a versatile platform to investigate through-space 19F-19F interactions, showcasing its potential for future applications in mechanistic studies.
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Affiliation(s)
- Wenjing Bao
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
| | - Guangxing Gu
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
| | - Jian Wu
- Instrumental Analysis Center, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | - Yu-Cheng Gu
- Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire RG42 6EY, U.K
| | - Yanchuan Zhao
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
- Instrumental Analysis Center, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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3
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Sahoo B, Chaudhuri S. Removal of lindane in liquid culture using soil bacteria and toxicity assessment in human skin fibroblast and HCT116 cell lines. ENVIRONMENTAL TECHNOLOGY 2023; 44:1213-1227. [PMID: 34694963 DOI: 10.1080/09593330.2021.1998229] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 10/15/2021] [Indexed: 06/13/2023]
Abstract
The development of effective measures for the remediation of lindane contaminated sites is the need of the hour. In this study, a potent lindane degrading bacteria, identified as Rhodococcus rhodochrous NITDBS9 was isolated from an agricultural field of Odisha that could utilize up to 87% of 100 mg L-1 lindane when grown under liquid culture conditions in mineral salt media in 10 days. The bacteria could produce biofilm in lindane-containing media. Rhodococcus rhodochrous NITDBS9 was further characterized for its plant growth-promoting properties and it was found that the bacteria showed abilities for phytohormone, ammonia and biosurfactant production, etc. This could be beneficial for the bioremediation and improvement of crop production in contaminated sites. Ecotoxicity studies carried out for lindane, and its degradation products in mung bean and mustard seeds showed a reduction in toxicity of lindane after treatment with NITDBS9. NITDBS9 was used with a previously isolated potent lindane degrading strain Paracoccus sp. NITDBR1 in a dual mixed culture for the enhanced removal of lindane in the liquid system i.e. up to 93% in 10 days. Cytotoxicity studies were conducted with lindane before and after treatment with the single and dual mixed cultures on human skin fibroblast and HCT116 cell lines. They revealed a significant reduction in toxicity of lindane after it was bioremediated with the single and dual mixed cultures. Therefore, our proposed strategy could be efficiently used for the detoxification of the lindane-contaminated system, and further work should be done to study the use of these cultures in the contaminated soil system.
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Affiliation(s)
- Banishree Sahoo
- Department of Biotechnology, National Institute of Technology Durgapur, Durgapur, India
| | - Surabhi Chaudhuri
- Department of Biotechnology, National Institute of Technology Durgapur, Durgapur, India
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Zorina AS, Maksimov AY, Maksimova YG. Degradation of Nitriles by Mixed Biofilms of Nitrile-Hydrolyzing Bacteria in Submerged Packed-Bed Reactor. Indian J Microbiol 2022; 62:610-617. [PMID: 36458224 PMCID: PMC9705647 DOI: 10.1007/s12088-022-01030-z] [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: 02/23/2022] [Accepted: 06/05/2022] [Indexed: 11/05/2022] Open
Abstract
Degradation of nitriles by mixed biofilms of nitrile-hydrolyzing bacteria Alcaligenes faecalis 2 and Rhodococcus ruber gt 1 grown on basalt and carbon carriers, in a submerged packed-bed reactor was studied. It was shown the formation of a massive mixed biofilm of Al. faecalis 2 and R. ruber gt 1 and the effective removal of nitriles and products of their degradation from the reaction medium. After the accumulation of carboxylic acid and some of the unprocessed substrate, the system adapts to 600-1000 h of biofilter operation, which is expressed in a decrease in the content of substrate and reaction products in the medium. The rate of acetonitrile and acrylonitrile utilization was 0.072-0.086 and 0.039-0.215 g/h, respectively, and acrylonitrile utilization with maximum rate was realized by a mixed biofilm on carbon fibers. Biofilms grown on mixed fibers in a "sandwich"-type reactor had the best characteristics for the transformation of aceto- and acrylonitrile (removal capacity of 99.6-99.9%, nitrile utilization rate of 0.080-0.095 g/h). Biofilms grown on basalt fiber with a diameter of 4-12 μm are also well suited for the degradation of acetonitrile (removal capacity of 100%, nitrile utilization rate of 0.086 g/h). The results of metagenomic analysis showed the resistance of Al. faecalis 2 and R. ruber gt 1 mixed biofilms against leaching from a biofilter and to competitive growth in an open system, indicating the advantages of biofilms over homogeneous biomass for wastewater treatment from nitrile compounds. Biofilms of two species of nitrile hydrolyzing bacteria on basalt and carbon fibers effectively purify water from nitriles in a submerged packed-bed reactor. Supplementary Information The online version contains supplementary material available at 10.1007/s12088-022-01030-z.
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Affiliation(s)
- A. S. Zorina
- Institute of Ecology and Genetics of Microorganisms, Ural Branch, Russian Academy of Sciences, Perm, Russia 614081
| | - A. Yu. Maksimov
- Institute of Ecology and Genetics of Microorganisms, Ural Branch, Russian Academy of Sciences, Perm, Russia 614081
- Perm State National Research University, Perm, Russia 614990
| | - Yu. G. Maksimova
- Institute of Ecology and Genetics of Microorganisms, Ural Branch, Russian Academy of Sciences, Perm, Russia 614081
- Perm State National Research University, Perm, Russia 614990
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Nazari MT, Simon V, Machado BS, Crestani L, Marchezi G, Concolato G, Ferrari V, Colla LM, Piccin JS. Rhodococcus: A promising genus of actinomycetes for the bioremediation of organic and inorganic contaminants. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 323:116220. [PMID: 36116255 DOI: 10.1016/j.jenvman.2022.116220] [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: 06/15/2022] [Revised: 08/16/2022] [Accepted: 09/06/2022] [Indexed: 06/15/2023]
Abstract
Rhodococcus is a genus of actinomycetes that has been explored by the scientific community for different purposes, especially for bioremediation uses. However, the mechanisms governing Rhodococcus-mediated bioremediation processes are far from being fully elucidated. In this sense, this work aimed to compile the recent advances in the use of Rhodococcus for the bioremediation of organic and inorganic contaminants present in different environmental compartments. We reviewed the bioremediation capacity and mechanisms of Rhodococcus spp. in the treatment of polycyclic aromatic hydrocarbons, phenolic substances, emerging contaminants, heavy metals, and dyes given their human health risks and environmental concern. Different bioremediation techniques were discussed, including experimental conditions, treatment efficiencies, mechanisms, and degradation pathways. The use of Rhodococcus strains in the bioremediation of several compounds is a promising approach due to their features, primarily the presence of appropriate enzyme systems, which result in high decontamination efficiencies; but that vary according to experimental conditions. Besides, the genus Rhodococcus contains a small number of opportunistic species and pathogens, representing an advantage from the point of view of safety. Advances in analytical detection techniques and Molecular Biology have been collaborating to improve the understanding of the mechanisms and pathways involved in bioremediation processes. In the context of using Rhodococcus spp. as bioremediation agents, there is a need for more studies that 1) evaluate the role of these actinomycetes on a pilot and field scale; 2) use genetic engineering tools and consortia with other microorganisms to improve the bioremediation efficiency; and 3) isolate new Rhodococcus strains from environments with extreme and/or contaminated conditions aiming to explore their adaptive capabilities for bioremediation purposes.
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Affiliation(s)
- Mateus Torres Nazari
- Graduate Program in Civil and Environmental Engineering, University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
| | - Viviane Simon
- Graduate Program in Civil and Environmental Engineering, University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
| | - Bruna Strieder Machado
- Faculty of Engineering and Architecture, University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
| | - Larissa Crestani
- Graduate Program in Chemical Engineering (PPGEQ), Federal University of Santa Maria (UFSM), Santa Maria, RS, Brazil
| | - Giovana Marchezi
- Faculty of Engineering and Architecture, University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
| | - Gustavo Concolato
- Faculty of Engineering and Architecture, University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
| | - Valdecir Ferrari
- Graduate Program in Mining, Metallurgical and Materials Engineering (PPGE3M), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Luciane Maria Colla
- Graduate Program in Civil and Environmental Engineering, University of Passo Fundo (UPF), Passo Fundo, RS, Brazil.
| | - Jeferson Steffanello Piccin
- Graduate Program in Civil and Environmental Engineering, University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
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6
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Wang Y, Fu M, Wu B, Huang M, Ma T, Zang H, Jiang H, Zhang Y, Li C. Insight into biofilm-forming patterns: biofilm-forming conditions and dynamic changes in extracellular polymer substances. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:89542-89556. [PMID: 35852740 DOI: 10.1007/s11356-022-21645-5] [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: 03/16/2022] [Accepted: 06/20/2022] [Indexed: 06/15/2023]
Abstract
The microbial biofilm adheres to the surface of the carrier, which protects the pollutant-degrading bacteria and resists harsh environments; thus, research on biofilm-forming patterns will help promote the application of biofilms in wastewater treatment. Herein, univariate analysis and response surface methodology (RSM) confirmed that glucose and mannose at 3-5 g/L promoted biofilm formation. Notably, the microplate method demonstrated that compared to trivalent cations, divalent cations could more greatly enhance the activity (especially magnesium) of the biofilm matrix, and the period of biofilm formation in the three strains was divided into the following stages: initial attachment (0-10 h), microcolony (10-24 h), maturation (24-48 h), and dispersion (36-72 h). During maturation, large amounts of extracellular polysaccharides (EPs) and extracellular DNA (eDNA) were distributed in the extracellular and intracellular spaces, respectively, as observed by super-resolution structured illumination microscopy (SR-SIM). This study enhances the understanding of the characteristics and patterns of biofilm formation and can facilitate the application of biofilms in wastewater treatment.
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Affiliation(s)
- Yue Wang
- College of Resource and Environment, Northeast Agricultural University, Harbin, 150030, China
| | - Meng Fu
- College of Resource and Environment, Northeast Agricultural University, Harbin, 150030, China
| | - Bowen Wu
- College of Resource and Environment, Northeast Agricultural University, Harbin, 150030, China
| | - Mingyan Huang
- College of Resource and Environment, Northeast Agricultural University, Harbin, 150030, China
| | - Tian Ma
- College of Resource and Environment, Northeast Agricultural University, Harbin, 150030, China
| | - Hailian Zang
- College of Resource and Environment, Northeast Agricultural University, Harbin, 150030, China
| | - Hanyi Jiang
- College of Resource and Environment, Northeast Agricultural University, Harbin, 150030, China
| | - Yuting Zhang
- College of Resource and Environment, Northeast Agricultural University, Harbin, 150030, China
| | - Chunyan Li
- College of Resource and Environment, Northeast Agricultural University, Harbin, 150030, China.
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7
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Vaishnav A, Kumar R, Singh HB, Sarma BK. Extending the benefits of PGPR to bioremediation of nitrile pollution in crop lands for enhancing crop productivity. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 826:154170. [PMID: 35227717 DOI: 10.1016/j.scitotenv.2022.154170] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 02/06/2022] [Accepted: 02/23/2022] [Indexed: 06/14/2023]
Abstract
Incessant release of nitrile group of compounds such as cyanides into agricultural land through industrial effluents and excessive use of nitrile pesticides has resulted in increased nitrile pollution. Release of nitrile compounds (NCs) as plant root exudates is also contributing to the problem. The released NCs interact with soil elements and persists for a long time. Persistent higher concentration of NCs in soil cause toxicity to beneficial microflora and affect crop productivity. The NCs can cause more problems to human health if they reach groundwater and enter the food chain. Nitrile degradation by soil bacteria can be a solution to the problem if thoroughly exploited. However, the impact of such bacteria in plant and soil environments is still not properly explored. Plant growth-promoting rhizobacteria (PGPR) with nitrilase activity has recently gained attention as potential solution to address the problem. This paper reviews the core issue of nitrile pollution in soil and the prospects of application of nitrile degrading bacteria for soil remediation, soil health improvement and plant growth promotion in nitrile-polluted soils. The possible mechanisms of PGPR that can be exploited to degrade NCs, converting them into plant useful compounds and synthesis of the phytohormone IAA from degraded NCs are also discussed at length.
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Affiliation(s)
- Anukool Vaishnav
- Department of Biotechnology, GLA University, Mathura 281406, India; Agroecology and Environment, Agroscope (Reckenholz), Zürich 8046, Switzerland
| | - Roshan Kumar
- National Centre for Biological Sciences (TIFR-NCBS), Bengaluru 560065, India
| | | | - Birinchi Kumar Sarma
- Department of Mycology and Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi 221110, India.
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An X, Zong Z, Zhang Q, Li Z, Zhong M, Long H, Cai C, Tan X. Novel thermo-alkali-stable cellulase-producing Serratia sp. AXJ-M cooperates with Arthrobacter sp. AXJ-M1 to improve degradation of cellulose in papermaking black liquor. JOURNAL OF HAZARDOUS MATERIALS 2022; 421:126811. [PMID: 34388933 DOI: 10.1016/j.jhazmat.2021.126811] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 07/20/2021] [Accepted: 08/01/2021] [Indexed: 05/26/2023]
Abstract
There is an urgent requirement to treat cellulose present in papermaking black liquor since it induces severe economic wastes and causes environmental pollution. We characterized cellulase activity at different temperatures and pH to seek thermo-alkali-stable cellulase-producing bacteria, a natural consortium of Serratia sp. AXJ-M and Arthrobacter sp. AXJ-M1 was used to improve the degradation of cellulose. Notably, the enzyme activities and the degradation rate of cellulose were increased by 30%-70% and 30% after co-culture, respectively. In addition, the addition of cosubstrates increased the degradation rate of cellulose beyond 30%. The thermo-alkali-stable endoglucanase (bcsZ) gene was derived from the strain AXJ-M and was cloned and expressed. The purified bcsZ displayed the maximum activity at 70 °C and pH 9. Mn2+, Ca2+, Mg2+ and Tween-20 had beneficial effects on the enzyme activity. Structurally, bcsZ potentially catalyzed the degradation of cellulose. The co-culture with ligninolytic activities significantly decreased target the parameters (cellulose 45% and COD 95%) while using the immobilized fluidized bed reactors (FBRs). Finally, toxicological tests and antioxidant enzyme activities indicated that the co-culture had a detoxifying effect on black liquor. Our study showed that Serratia sp. AXJ-M acts synergistically with Arthrobacter sp. AXJ-M1 may be potentially useful for bioremediation for black liquor.
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Affiliation(s)
- Xuejiao An
- College of Bioscience and Biotechnology, Jiangxi Agricultural University, Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Nanchang 330045, PR China
| | - Zhengbin Zong
- College of Bioscience and Biotechnology, Jiangxi Agricultural University, Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Nanchang 330045, PR China
| | - Qinghua Zhang
- College of Bioscience and Biotechnology, Jiangxi Agricultural University, Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Nanchang 330045, PR China.
| | - Zhimin Li
- College of Bioscience and Biotechnology, Jiangxi Agricultural University, Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Nanchang 330045, PR China
| | - Min Zhong
- College of Bioscience and Biotechnology, Jiangxi Agricultural University, Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Nanchang 330045, PR China
| | - Haozhi Long
- College of Bioscience and Biotechnology, Jiangxi Agricultural University, Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Nanchang 330045, PR China
| | - Changzhi Cai
- College of Bioscience and Biotechnology, Jiangxi Agricultural University, Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Nanchang 330045, PR China
| | - Xiaoming Tan
- School of Life Sciences, Hubei University, State Key Laboratory of Biocatalysis and Enzyme Engineering, Wuhan 430062, PR China
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Deng J, Jia M, Zeng YQ, Li W, He J, Ren J, Bai J, Zhang L, Li J, Yang S. Enhanced treatment of organic matter in slaughter wastewater through live Bacillus velezensis strain using nano zinc oxide microsphere. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 292:118306. [PMID: 34634401 DOI: 10.1016/j.envpol.2021.118306] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 09/26/2021] [Accepted: 10/05/2021] [Indexed: 06/13/2023]
Abstract
Slaughter wastewater is an important and wide range of environmental issues, and even threaten human health through meat production. A high efficiency and stability microsphere-immobilized Bacillus velezensis strain was designed to remove organic matter and inhibit the growth of harmful bacteria in process of slaughter wastewater. Bacillus velezensis was immobilized on the surface of sodium alginate (SA)/Polyvinyl alcohol (PVA)/Nano Zinc Oxide (Nano-ZnO) microsphere with the adhesion to bio-carrier through direct physical adsorption. Results indicated that SA/PVA/ZnO and SA/ZnO microspheres could inhibit E.coli growth with adding 0.15 g/L nano-ZnO and not affect Bacillus velezensis strain, and the removal the chemical oxygen demand (COD) rates of SA/PVA/ZnO microsphere immobilized cells are 16.99%, followed by SA/ZnO (13.69%) and free bacteria (7.61%) from 50% concentration slaughter wastewater within 24 h at 37 °C, pH 7.0, and 120 rpm, a significant difference was found between the microsphere and control group. Moreover, when the processing time reaches 36 h, COD degradation of SA/PVA/ZnO microsphere is obviously higher than other groups (SA/PVA/ZnO:SA/ZnO:control vs 18.535 : 15.446: 10.812). Similar results were obtained from 30% concentration slaughter wastewater. Moreover, protein degradation assay was detected, and there are no significant difference (SA/PVA/ZnO:SA/ZnO:control vs 35.4 : 34.4: 36.0). The design of this strategy could greatly enhance the degradation efficiency, inhibit the growth of other bacteria and no effect on the activity of protease in slaughter wastewater. These findings suggested that the nano-ZnO hydrogel immobilization Bacillus velezensis system wastewater treatment is a valuable alternative method for the remediation of pollutants from slaughter wastewater with a novel and eco-friendly with low-cost investment as an advantage.
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Affiliation(s)
- Jing Deng
- National Engineering Laboratory for Deep Process of Rice and Byproducts, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, Hunan, China
| | - Mingxi Jia
- National Engineering Laboratory for Deep Process of Rice and Byproducts, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, Hunan, China
| | - Yu Qing Zeng
- National Engineering Laboratory for Deep Process of Rice and Byproducts, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, Hunan, China
| | - Wen Li
- National Engineering Laboratory for Deep Process of Rice and Byproducts, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, Hunan, China; College of Life Sciences and Chemistry, Hunan University of Technology, Zhuzhou, Hunan, 412007, Hunan, China.
| | - JinTao He
- National Engineering Laboratory for Deep Process of Rice and Byproducts, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, Hunan, China
| | - Jiali Ren
- National Engineering Laboratory for Deep Process of Rice and Byproducts, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, Hunan, China; Hunan Province Key Laboratory of Edible Forestry Resources Safety and Processing Utilization, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, Hunan, China
| | - Jie Bai
- National Engineering Laboratory for Deep Process of Rice and Byproducts, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, Hunan, China
| | - Lin Zhang
- National Engineering Laboratory for Deep Process of Rice and Byproducts, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, Hunan, China
| | - Juan Li
- National Engineering Laboratory for Deep Process of Rice and Byproducts, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, Hunan, China
| | - Sheng Yang
- School of Energy Science and Engineering, Central South University, Changsha, 410083, China
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Zuo B, Shao H, Li W, Wang S, Huang M, Deng Q. Magnetic mesoporous nanomaterials with AIE properties for selective detection and removal of CN - from water under magnetic conditions. Analyst 2021; 146:5550-5557. [PMID: 34515702 DOI: 10.1039/d1an01152a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have prepared a type of magnetic mesoporous nanomaterial with aggregation-induced emission properties (Fe3O4@mSiO2@TPA@BA, hence abbr. FSTB) to detect and remove cyanide ions (CN-) under magnetic conditions. FSTB has a large specific surface area and improved fluorescence performance to identify CN-, and its superparamagnetic behavior plays an important role in removing CN-. The magnetic sensor FSTB shows excellent selectivity and anti-interference for the detection of CN- in aqueous solutions. It is obvious from the equation LOD = 3δ/S that the limit of detection (LOD) of FSTB for CN- is significantly lower than the permissible level of CN- in drinkable water recommended by the World Health Organization. Therefore, the magnetic sensor FSTB has a wide range of applications for detecting and removing harmful CN-.
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Affiliation(s)
- Bin Zuo
- College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China.
| | - Han Shao
- College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China.
| | - Wanfang Li
- College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China.
| | - Shige Wang
- College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China.
| | - Mingxian Huang
- College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China.
| | - Qinyue Deng
- College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China.
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11
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An X, Zhong B, Chen G, An W, Xia X, Li H, Lai F, Zhang Q. Evaluation of bioremediation and detoxification potentiality for papermaking black liquor by a new isolated thermophilic and alkali-tolerant Serratia sp. AXJ-M. JOURNAL OF HAZARDOUS MATERIALS 2021; 406:124285. [PMID: 33189463 DOI: 10.1016/j.jhazmat.2020.124285] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 09/25/2020] [Accepted: 10/12/2020] [Indexed: 06/11/2023]
Abstract
There is a great need for efficiently treating papermaking black liquor because it can seriously pollute both soil and water ecosystems. In this study, the Plackett-Burman (PB) experimental design combined with response surface methodology (RSM) was used for improving the biodegradation efficiency of lignin by a new isolated thermophilic and alkali-tolerant strain Serratia sp. AXJ-M, and the results showed that a biodegradation efficiency of 70.5% was achieved under optimal culture conditions. The bacterium with ligninolytic activities significantly decreased target the parameters (color 80%, lignin 60%, phenol 95%, BOD 80% and COD 80%). The control and treated samples were analyzed by gas chromatography-mass spectrometer (GC-MS), which showed that the concentrations of a majority of low-molecular-weight compounds were decreased after biological treatment. Furthermore, toxicological, genotoxicity and phytotoxicity studies have supported the detoxification by the bacterium of black liquor. Finally, the genome sequence of the thermophilic, alkali-tolerant and lignin-degrading bacterium AXJ-M was completed, and the genetic basis of the thermophilic and alkali-resistant properties of AXJ-M was preliminarily revealed. The dyp-type peroxidase was first reported to have the potential to catalyze lignin degradation structurally. These findings suggest that Serratia sp. AXJ-M may be potentially useful for bioremediation applications for papermaking black liquor.
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Affiliation(s)
- Xuejiao An
- College of Bioscience and Biotechnology, Jiangxi Agricultural University, Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Nanchang 330045, PR China; Jiangxi Key Laboratory for Conservation and Utilization of Fungal Resources, Jiangxi Agricultural University, Nanchang 330045, PR China
| | - Bin Zhong
- College of Bioscience and Biotechnology, Jiangxi Agricultural University, Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Nanchang 330045, PR China; Jiangxi Key Laboratory for Conservation and Utilization of Fungal Resources, Jiangxi Agricultural University, Nanchang 330045, PR China
| | - Guotao Chen
- College of Bioscience and Biotechnology, Jiangxi Agricultural University, Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Nanchang 330045, PR China; Jiangxi Key Laboratory for Conservation and Utilization of Fungal Resources, Jiangxi Agricultural University, Nanchang 330045, PR China
| | - Weijuan An
- College of Bioscience and Biotechnology, Jiangxi Agricultural University, Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Nanchang 330045, PR China; Jiangxi Key Laboratory for Conservation and Utilization of Fungal Resources, Jiangxi Agricultural University, Nanchang 330045, PR China
| | - Xiang Xia
- College of Bioscience and Biotechnology, Jiangxi Agricultural University, Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Nanchang 330045, PR China; Jiangxi Key Laboratory for Conservation and Utilization of Fungal Resources, Jiangxi Agricultural University, Nanchang 330045, PR China
| | - Hanguang Li
- College of Bioscience and Biotechnology, Jiangxi Agricultural University, Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Nanchang 330045, PR China; Jiangxi Key Laboratory for Conservation and Utilization of Fungal Resources, Jiangxi Agricultural University, Nanchang 330045, PR China
| | - Fenju Lai
- College of Bioscience and Biotechnology, Jiangxi Agricultural University, Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Nanchang 330045, PR China; Jiangxi Key Laboratory for Conservation and Utilization of Fungal Resources, Jiangxi Agricultural University, Nanchang 330045, PR China
| | - Qinghua Zhang
- College of Bioscience and Biotechnology, Jiangxi Agricultural University, Jiangxi Engineering Laboratory for the Development and Utilization of Agricultural Microbial Resources, Nanchang 330045, PR China; Jiangxi Key Laboratory for Conservation and Utilization of Fungal Resources, Jiangxi Agricultural University, Nanchang 330045, PR China.
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12
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Sun Y, Yin M, Zheng D, Wang T, Zhao X, Luo C, Li J, Liu Y, Xu S, Deng S, Wang X, Zhang D. Different acetonitrile degraders and degrading genes between anaerobic ammonium oxidation and sequencing batch reactor as revealed by stable isotope probing and magnetic-nanoparticle mediated isolation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 758:143588. [PMID: 33218816 DOI: 10.1016/j.scitotenv.2020.143588] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 10/30/2020] [Accepted: 10/31/2020] [Indexed: 06/11/2023]
Abstract
Microbial degraders play crucial roles in wastewater treatment processes, but their use is limited as most microbes are yet unculturable. Stable isotope probing (SIP) is a cultivation-independent technique identifying functional-yet-uncultivable microbes in ambient environment, but is unsatisfactory for substrates with low assimilation rate owing to the low isotope incorporation into DNA. In this study, we used acetonitrile as the target low-assimilation chemical in many wastewater treatment plants and attempted to identify the active acetonitrile degraders in the activated sludge, via DNA-SIP and magnetic-nanoparticle mediated isolation (MMI) which is another cultivation-independent approach without the requirement of substrate labeling. The two approaches identified different active acetonitrile degraders in a 3-day short-term anaerobic ammonium oxidation (ANAMMOX). MMI enriched significantly more acetonitrile-degraders than SIP, showing the advantages in identifying the active degraders for low-assimilation substrates. Sequencing batch reactor (SBR, 30-day degradation) helped in more incorporation of 15N-labeled acetonitrile into the active degraders, thus the same acetonitrile-degraders and acetonitrile-degrading genes were identified by SIP and MMI. Different acetonitrile degraders between ANAMMOX and SBR were attributed to the distinct hydrological conditions. Our study for the first time explored the succession of acetonitrile-degraders in wastewater and identified the active acetonitrile-degraders which could be further enriched for enhancing acetonitrile degradation performance. These findings provide new insights into the acetonitrile metabolic process in wastewater treatment plants and offer suggestive conclusions for selecting appropriate treatment strategy in wastewater management.
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Affiliation(s)
- Yujiao Sun
- College of Water Science, Beijing Normal University, Beijing 100875, China
| | - Meng Yin
- College of Water Science, Beijing Normal University, Beijing 100875, China
| | - Danyang Zheng
- College of Water Science, Beijing Normal University, Beijing 100875, China
| | - Tiandai Wang
- College of Water Science, Beijing Normal University, Beijing 100875, China
| | - Xiaohui Zhao
- College of Water Science, Beijing Normal University, Beijing 100875, China
| | - Chunling Luo
- Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Jibing Li
- Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Yueqiao Liu
- College of Water Science, Beijing Normal University, Beijing 100875, China
| | - Shangwei Xu
- College of Water Science, Beijing Normal University, Beijing 100875, China
| | - Songqiang Deng
- Research Institute for Environmental Innovation (Tsinghua-Suzhou), Suzhou 215163, China
| | - Xinzi Wang
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Dayi Zhang
- School of Environment, Tsinghua University, Beijing 100084, China; National Engineering Laboratory for Site Remediation Technologies, Beijing 100015, China.
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13
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Li C, Chen X, Wen L, Cheng Y, An X, Li T, Zang H, Zhao X, Li D, Hou N. An enhancement strategy for the biodegradation of high-concentration aliphatic nitriles: Utilizing the glucose-mediated carbon catabolite repression mechanism. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 265:114302. [PMID: 32480233 DOI: 10.1016/j.envpol.2020.114302] [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: 10/21/2019] [Revised: 01/23/2020] [Accepted: 02/29/2020] [Indexed: 06/11/2023]
Abstract
Wastewater containing high concentrations of nitriles, if discharged without an appropriate nonhazardous disposal strategy, will cause serious environmental pollution. During secondary sewage biological treatment, most existing bacteria cannot endure high-concentration nitriles due to poor tolerance and low degradation ability. The Rhodococcus rhodochrous strain BX2 screened by our laboratory shows high resistance to nitriles and can efficiently degrade these compounds. Compared with sole high-concentration nitriles present in the biodegradation process, the addition of glucose at a suitable concentration can effectively increase the biomass of BX2, promote the expression of nitrile-degrading enzyme genes, improve the activities of these enzymes and enhance the pollutant removal efficiency via carbon catabolite repression (CCR) mechanisms. Whole-genome sequencing revealed that the four key regulators of CCR identified in gram-negative and gram-positive bacteria are concomitant in BX2. This study provides an economically feasible strategy for the microbial remediation of high-concentration nitriles and other organic pollutants.
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Affiliation(s)
- Chunyan Li
- College of Resources and Environment, Northeast Agricultural University, Harbin, 150030, Heilongjiang, PR China
| | - Xi Chen
- College of Resources and Environment, Northeast Agricultural University, Harbin, 150030, Heilongjiang, PR China
| | - Luming Wen
- College of Resources and Environment, Northeast Agricultural University, Harbin, 150030, Heilongjiang, PR China
| | - Yi Cheng
- College of Science, China Agricultural University, Beijing, 100083, PR China
| | - Xuejiao An
- College of Bioscience and Bioengineering, Jiangxi Agricultural University, Jiangxi, 330045, PR China
| | - Tianzhu Li
- College of Resources and Environment, Northeast Agricultural University, Harbin, 150030, Heilongjiang, PR China
| | - Hailian Zang
- College of Resources and Environment, Northeast Agricultural University, Harbin, 150030, Heilongjiang, PR China
| | - Xinyue Zhao
- College of Resources and Environment, Northeast Agricultural University, Harbin, 150030, Heilongjiang, PR China
| | - Dapeng Li
- College of Resources and Environment, Northeast Agricultural University, Harbin, 150030, Heilongjiang, PR China
| | - Ning Hou
- College of Resources and Environment, Northeast Agricultural University, Harbin, 150030, Heilongjiang, PR China.
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14
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Wang W, Niu J, Yang Z. An efficient reduction of unsaturated bonds and halogen-containing groups by nascent hydrogen over Raney Ni catalyst. JOURNAL OF HAZARDOUS MATERIALS 2020; 389:121912. [PMID: 31874759 DOI: 10.1016/j.jhazmat.2019.121912] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 12/13/2019] [Accepted: 12/15/2019] [Indexed: 06/10/2023]
Abstract
Presence of unsaturated bonds and halogen-containing groups is the most common characteristic of toxic and harmful environmental pollutants. Herein, catalytic hydrogenation was chosen as a water quality control method for such contaminants. Considering the safety, availability and activity of the hydrogen source, electrochemical in situ hydrogen generation was introduced. Under the combined action of Raney Ni (R-Ni) and nascent hydrogen (Nas-H2), three compounds (50 mg L-1, 90 ml), i.e., acrylamide, 2, 6-dibromo-4-nitrophenol and 2-chloro-4-fluorobenzonitrile achieved complete hydrogenation reduction in a short time. The improved system realized the quantitative consumption of hydrogen source and the efficient operation of hydrogenation reaction under mild conditions. Additionally, the alkaline environment formed by hydrogen evolution reaction (HER) avoided secondary pollution caused by catalyst dissolution. Atomic hydrogen (H·) produced from R-Ni and Nas-H2 was the active free radical of the reaction. The hydrogenation activities of different functional groups were obtained according to the following order: Ph-NO2 > -C = C- > Ph-C≡N > Ph-Br > Ph-Cl > Ph-F. This work indicates that the catalytic hydrogenation system consisting of R-Ni and Nas-H2 is a promising technology to reduce unsaturated bonds and halogen-containing groups.
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Affiliation(s)
- Weilai Wang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, People's Republic of China; Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan 523808, People's Republic of China
| | - Junfeng Niu
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan 523808, People's Republic of China.
| | - Zhifeng Yang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, People's Republic of China
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15
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An X, Cheng Y, Miao L, Chen X, Zang H, Li C. Characterization and genome functional analysis of an efficient nitrile-degrading bacterium, Rhodococcus rhodochrous BX2, to lay the foundation for potential bioaugmentation for remediation of nitrile-contaminated environments. JOURNAL OF HAZARDOUS MATERIALS 2020; 389:121906. [PMID: 31874764 DOI: 10.1016/j.jhazmat.2019.121906] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Revised: 12/12/2019] [Accepted: 12/14/2019] [Indexed: 06/10/2023]
Abstract
Nitriles are a class of extremely toxic chemicals with extensive applications, and these compounds pose potential risks to humans and ecosystems. The activated sludge isolate Rhodococcus rhodochrous BX2 efficiently metabolizes aliphatic nitriles. However, the molecular underpinnings of the degradation mechanism of aliphatic nitriles by BX2 remain unknown, and the metabolic fate of aliphatic nitriles also has not been elucidated. Here, strain BX2 was capable of completely mineralizing three aliphatic nitriles. Bioinformatic analysis yielded a deeper insight into the genetic basis of BX2 for efficient degradation of aliphatic nitriles and adaptation to harsh environments. Transcriptional, enzyme activity and metabolite analyses confirmed that the intracellular inducible nitrile hydratase/amidase pathway is the preferred metabolic pathway. Our findings provide an in-depth understanding of the environmental fate of aliphatic nitriles and, most importantly, offer a new perspective on the potential applications of the genus Rhodococcus in bioremediation and the development of degradation enzyme resources.
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Affiliation(s)
- Xuejiao An
- College of Resources and Environment, Northeast Agricultural University, Harbin 150030, Heilongjiang, PR China
| | - Yi Cheng
- College of Science, China Agricultural University, Beijing 100083, PR China
| | - Lei Miao
- College of Resources and Environment, Northeast Agricultural University, Harbin 150030, Heilongjiang, PR China
| | - Xi Chen
- College of Resources and Environment, Northeast Agricultural University, Harbin 150030, Heilongjiang, PR China
| | - Hailian Zang
- College of Resources and Environment, Northeast Agricultural University, Harbin 150030, Heilongjiang, PR China
| | - Chunyan Li
- College of Resources and Environment, Northeast Agricultural University, Harbin 150030, Heilongjiang, PR China.
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16
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Ren G, He X, Wu P, He Y, Zhang Y, Tang S, Song X, He Y, Wei Y, Ding P, Yang F. Biodegradation of microcystin-RR and nutrient pollutants using Sphingopyxis sp. YF1 immobilized activated carbon fibers-sodium alginate. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:10811-10821. [PMID: 31942719 DOI: 10.1007/s11356-020-07640-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 01/07/2020] [Indexed: 06/10/2023]
Abstract
A novel biological material named activated carbon fibers-sodium alginate@Sphingopyxis sp. YF1 (ACF-SA@YF1) was synthesized for microcystin-RR (MC-RR) and nutrient pollutant degradation in eutrophic water. The synthesized biomaterial was characterized by scanning electron microscopy (SEM). Box-Behnken design and response surface methodology (RSM) were utilized for the optimization of conditions during the MC-RR degradation. The degradation of MC-RR and nutrient pollutants was dynamically detected. The results revealed that the optimal conditions were temperature 32.51 °C, pH 6.860, and inoculum 14.97%. The removal efficiency of MC-RR, nitrogen, phosphorus, and chemical oxygen demand were 0.76 μg/mL/h, 32.45%, 94.57%, and 64.07%, respectively. In addition, ACF-SA@YF1 also performed satisfactory cyclic stability, while the MC-RR removal efficiency was 70.38% after seven cycles and 78.54% of initial activity after 20 days of storage. Therefore, it is reasonable to believe that ACF-SA@YF1 is an effective material which has a great prospect in removing MC-RR and nutrients from freshwater ecosystems.
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Affiliation(s)
- Guofeng Ren
- Xiangya School of Public Health, Central South University, Changsha, 410078, Hunan, China
| | - Xinghou He
- Xiangya School of Public Health, Central South University, Changsha, 410078, Hunan, China
| | - Pian Wu
- Xiangya School of Public Health, Central South University, Changsha, 410078, Hunan, China
| | - Yayuan He
- Xiangya School of Public Health, Central South University, Changsha, 410078, Hunan, China
| | - Yong Zhang
- Xiangya School of Public Health, Central South University, Changsha, 410078, Hunan, China
| | - Shibiao Tang
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, Hunan, China
| | - Xinli Song
- Xiangya School of Public Health, Central South University, Changsha, 410078, Hunan, China
| | - Yafei He
- Xiangya School of Public Health, Central South University, Changsha, 410078, Hunan, China
| | - Yuandan Wei
- Xiangya School of Public Health, Central South University, Changsha, 410078, Hunan, China
| | - Ping Ding
- Xiangya School of Public Health, Central South University, Changsha, 410078, Hunan, China.
| | - Fei Yang
- Xiangya School of Public Health, Central South University, Changsha, 410078, Hunan, China.
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17
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Kuyukina MS, Ivshina IB. Bioremediation of Contaminated Environments Using Rhodococcus. ACTA ACUST UNITED AC 2019. [DOI: 10.1007/978-3-030-11461-9_9] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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18
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Abstract
The review is devoted to biocatalysts based on actinobacteria of the genus Rhodococcus, which are promising for environmental biotechnologies. In the review, biotechnological advantages of Rhodococcus bacteria are evaluated, approaches used to develop robust and efficient biocatalysts are discussed, and their relevant applications are given. We focus on Rhodococcus cell immobilization in detail (methods of immobilization, criteria for strains and carriers, and optimization of process parameters) as the most efficient approach for stabilizing biocatalysts. It is shown that advanced Rhodococcus biocatalysts with improved working characteristics, enhanced stress tolerance, high catalytic activities, human and environment friendly, and commercially viable are developed, which are suitable for wastewater treatment, bioremediation, and biofuel production.
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19
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Zorina AS, Maksimova YG, Demakov VA. Biofilm Formation by Monocultures and Mixed Cultures of Alcaligenes faecalis 2 and Rhodococcus ruber gt 1. Microbiology (Reading) 2019. [DOI: 10.1134/s0026261719020140] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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20
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Water Quality Assessment of Surface and Groundwater Sources Using a Water Quality Index Method: A Case Study of a Peri-Urban Town in Southwest, Nigeria. ENVIRONMENTS 2019. [DOI: 10.3390/environments6020023] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Sustainable access to safe drinking water remains a global problem as more people in the world still consume water from unimproved sources. This study was carried out to evaluate the quality of 12 different water sources and 2 treated water used by a peri-urban town in the Southwest region of Nigeria to assess their suitability for drinking and domestic use. Water quality parameters studied include pH, temperature, acidity, total alkalinity, chloride content and total CO2. A Flame Atomic Absorption spectrophotometer was used to determine the concentrations of Ca, Mg, Cu, Cr, and Pb in the water samples. The total coliform was determined using the most probable number technique while a qualitative method was used to detect the presence of faecal coliform and E. coli in the water samples. All the physicochemical water quality parameters complied with regulatory standards. Similarly, most of the heavy metals also complied except for some sites. Faecal coliform and E. coli tested positive for all the samples except one of the tap water sample. Majority of the water samples (86%) were rated as excellent based on the physicochemical parameters. One sample each was rated as having poor and good water quality, respectively. All the samples tested positive for faecal coliform bacteria and E. coli except one (treated water). It is recommended that Microbial water quality parameters be included in all Water Quality Index (WQI) analyses in order to give the true status of the quality of a water resource.
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21
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de Morais e Silva L, Lorenzo VP, Lopes WS, Scotti L, Scotti MT. Predictive Computational Tools for Assessment of Ecotoxicological Activity of Organic Micropollutants in Various Water Sources in Brazil. Mol Inform 2019; 38:e1800156. [DOI: 10.1002/minf.201800156] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 01/06/2019] [Indexed: 01/18/2023]
Affiliation(s)
- Luana de Morais e Silva
- Post-Graduate Program in Science and Environmental TechnologyDepartment of Sanitary and Environmental EngineeringState University of Paraíba 58429500 Campina Grande, PB Brazil
| | - Vitor Prates Lorenzo
- Federal Institute of Education, Science and Technology Sertão Pernambucano 56316686 Petrolina, Pernambuco Brazil
| | - Wilton Silva Lopes
- Post-Graduate Program in Science and Environmental TechnologyDepartment of Sanitary and Environmental EngineeringState University of Paraíba 58429500 Campina Grande, PB Brazil
| | - Luciana Scotti
- Post-Graduate Program in Natural and Synthetic Bioactive ProductsFederal University of Paraíba 58051-900 João Pessoa, PB Brazil
| | - Marcus Tullius Scotti
- Post-Graduate Program in Natural and Synthetic Bioactive ProductsFederal University of Paraíba 58051-900 João Pessoa, PB Brazil
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22
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Yu H, Jiao S, Wang M, Liang Y, Tang L. Biodegradation of Nitriles by Rhodococcus. BIOLOGY OF RHODOCOCCUS 2019. [DOI: 10.1007/978-3-030-11461-9_7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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23
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Isolation and characterization of a lindane degrading bacteria Paracoccus sp. NITDBR1 and evaluation of its plant growth promoting traits. Int Microbiol 2018; 22:155-167. [PMID: 30810939 DOI: 10.1007/s10123-018-00037-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 10/02/2018] [Accepted: 10/15/2018] [Indexed: 01/29/2023]
Abstract
Lindane contamination in different environmental compartments is still posing a serious threat to our environment and effective measures need to be taken for the detoxification of lindane. Soil bacteria isolated from agricultural fields are known to possess certain plant growth promoting traits like the production of phytohormones, production of ammonia, nitrogen fixation and solubilization of phosphorus, etc. In the present study, an indigenous bacterial strain Paracoccus sp. NITDBR1 have been isolated from an agricultural field in Manipur, India which could grow on 100 mg L-1 lindane as the sole source of carbon and could degrade up to 90% of lindane in mineral salt media under liquid culture conditions in 8 days. The strain NITDBR1 was able to form biofilm in lindane media and the addition of substrate like glucose and sucrose enhanced the biofilm formation by 1.3 and 1.17-fold respectively in 3 days. The strain NITDBR1 could produce glycolipid and glycoprotein based biosurfactants. It was also found to possess plant growth promoting traits like nitrogen fixation and indole-3-acetic acid production to assist crop production. The phytotoxicity studies carried out on mustard seeds revealed that the degradation products formed after treatment with NITDBR1 could lower the toxicity of lindane for root elongation by 1.3-fold. Therefore, strain NITDBR1 could be useful for the bioremediation of soil contaminated with lindane with lesser damage to the environment, biofilm forming ability may help the bacteria survive under stressed environmental conditions, and biosurfactant production will help in increasing the bioavailability of contaminants. The plant growth promoting traits can be beneficial for agriculture. With such soil friendly activities coupled with pesticide degradation, this strain can be used for environmental as well as agricultural applications.
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