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Harboul K, El Aabedy A, Hammani K, El-Karkouri A. Reduction of hexavalent chromium using Bacillus safensis isolated from an abandoned mine. ENVIRONMENTAL TECHNOLOGY 2024; 45:4495-4511. [PMID: 37671659 DOI: 10.1080/09593330.2023.2256457] [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: 04/14/2023] [Accepted: 08/17/2023] [Indexed: 09/07/2023]
Abstract
The present work focused on the isolation of a bacterial strain multi-resistant to heavy metals with a high potential for reducing hexavalent chromium (Cr(VI)) and studied its Cr(VI) removal performance in immobilized state and the mechanisms involved. Bacterial isolate was identified as Bacillus safensis CCMM B629 (B. safensis), is able to completely reduce 50, 100 and 200 mg/L of Cr(VI) after 24, 48 and 120 h, respectively under optimized conditions of pH 7 and 30°C. The coexistence of nitrates, cadmium and mercury inhibits reduction, while copper and iron significantly improve removal efficiencies. Additionally, the presence of electron donors such as glycerol, glucose and citrate significantly increases bioreduction rate. Cells immobilized in alginate beads successfully reduced Cr(VI) compared to free cells, showing the performance of biobeads in Cr(VI) reduction. Membrane fraction exhibited highest rate of Cr(VI) reduction (65%) compared to other cellular components, indicating that Cr(VI) reduction occurred primarily in cell membrane. Further characterization of Cr(VI) removal by B. safensis cells using scanning electron microscopy and energy-dispersive X-ray (SEM-EDX) analysis showed its ability to reduce and adsorb Cr(VI), confirming that hexavalent chromium was taken up successfully on bacterial cell surfaces. Based on Fourier transform infrared spectroscopy analysis (FTIR), hydroxyl, carboxyl, amide, and phosphoryl functional groups participated in combination with Cr(III). In conclusion, B. safensis is a bacterium with great potential for Cr(VI) removal, and it is a promising and competitive strain for use in bioremediation of Cr(VI) contaminated industrial effluents.
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Affiliation(s)
- Kaoutar Harboul
- Natural Resources and Environment Laboratory, Polydisciplinary Faculty of Taza, Sidi Mohamed Ben Abdellah University, Fez, Morocco
| | - Amal El Aabedy
- Laboratory of Microbial Biotechnology and Bioactive Molecules, Sciences and Technologies Faculty, Sidi Mohamed Ben Abdellah University, Fez, Morocco
| | - Khalil Hammani
- Natural Resources and Environment Laboratory, Polydisciplinary Faculty of Taza, Sidi Mohamed Ben Abdellah University, Fez, Morocco
| | - Abdenbi El-Karkouri
- Biotechnology, Environment, Agri-Food and Health Laboratory, Faculty of Sciences Dhar el Mahraz, Sidi Mohamed Ben Abdellah University, Fez, Morocco
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Li Z, Cui E, Gu N, Ma W, Guo Q, Li X, Jin J, Wang Q, Ding C. Unveiling the biointerfaces characteristics and removal pathways of Cr(Ⅵ) in Bacillus cereus FNXJ1-2-3 for the Cr(Ⅵ)-to-Cr(0) conversion. ENVIRONMENTAL RESEARCH 2024; 251:118663. [PMID: 38460667 DOI: 10.1016/j.envres.2024.118663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 02/23/2024] [Accepted: 03/07/2024] [Indexed: 03/11/2024]
Abstract
Although less toxic than hexavalent chromium, Cr (Ⅲ) species still pose a threat to human health. The Cr (Ⅵ) should be converted to Cr (0) instead of Cr (Ⅲ), which is still involved in biological detoxification filed. Herein, for the first time, it was found that Cr(Ⅵ) can be reduced into Cr(0) by Bacillus cereus FNXJ1-2-3, a way to completely harmless treatment of Cr(Ⅵ). The bacterial strain exhibited excellent performance in the reduction, sorption, and accumulation of Cr(Ⅵ) and Cr (Ⅲ). XPS etching characterization inferred that the transformation of Cr(Ⅵ) into Cr(0) followed a reduction pathway of Cr(Ⅵ)→Cr (Ⅲ)→metallic Cr(0), in which at least two secretory chromium reductases (ECrⅥ→Ⅲ and ECrⅢ→0) worked. Under the optimum condition, the yield ratio of Cr(0)/Cr (Ⅲ) reached 33.90%. In addition, the interfacial interactions, ion channels, chromium reductases, and external electron donors also contributed to the Cr(Ⅵ)/Cr(0) transformation. Findings of this study indicate that Bacillus cereus FNXJ1-2-3 is a promising bioremediation agent for Cr(Ⅵ) pollution control.
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Affiliation(s)
- Zhaoxia Li
- School of Marine and Biological Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu, 224051, China
| | - Entian Cui
- Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng, Jiangsu, 224051, China
| | - Naipeng Gu
- UNHO (China) BioPharmaceutical Co., Ltd., Nanjing, Jiangsu, 210046, China
| | - Weixing Ma
- School of Environmental Science and Engineering, Jiangsu Province Engineering Research Center of Intelligent Environmental Protection Equipment, Yancheng Institute of Technology, Yancheng, Jiangsu, 224051, China
| | - Qingyuan Guo
- School of Environmental Science and Engineering, Jiangsu Province Engineering Research Center of Intelligent Environmental Protection Equipment, Yancheng Institute of Technology, Yancheng, Jiangsu, 224051, China
| | - Xuan Li
- School of Environmental Science and Engineering, Jiangsu Province Engineering Research Center of Intelligent Environmental Protection Equipment, Yancheng Institute of Technology, Yancheng, Jiangsu, 224051, China
| | - Jianxiang Jin
- School of Environmental Science and Engineering, Jiangsu Province Engineering Research Center of Intelligent Environmental Protection Equipment, Yancheng Institute of Technology, Yancheng, Jiangsu, 224051, China
| | - Qun Wang
- Jiangsu YIDA Testing Technology Co., Ltd. , Building A-15, Big Data Industrial Park, Chengnan New District, Yancheng, Jiangsu, 224051, China
| | - Cheng Ding
- School of Environmental Science and Engineering, Jiangsu Province Engineering Research Center of Intelligent Environmental Protection Equipment, Yancheng Institute of Technology, Yancheng, Jiangsu, 224051, China.
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Moroz OM, Hnatush SO, Yavorska HV, Zvir GI, Tarabas OV. Influence of potassium dichromate on the reduction of sulfur, nitrate and nitrite ions by bacteria Desulfuromonas sp. REGULATORY MECHANISMS IN BIOSYSTEMS 2022. [DOI: 10.15421/022220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
This article presents the regularities of reduction of sulfur, nitrate and nitrite ions by sulfur reducing bacteria Desulfuromonas sp., which were isolated from the water of the man-made Yavorivske Lake (Lviv Region, Ukraine), under the influence of potassium dichromate. This bacteria in the process of anaerobic respiration can use and reduce different electron acceptors, such as sulfur, nitrates, nitrites, oxidized forms of heavy metals, in particular, hexavalent chromium. Technogenically altered ecotopes are characterized by complex pollution, so several electron acceptors are available to bacteria at the same time. Strains of microorganisms isolated from such ecotopes are adapted to unfavourable conditions and therefore have high biotechnological potential. The purpose of this work was to investigate the regularities of elemental sulfur, nitrate or nitrite ion usage by sulfidogenic bacteria of Desulfuromonas genus in conditions of simultaneous presence in the medium of another electron acceptor – Cr(VI), to establish the succession of reduction of electron acceptors by strains of these bacteria and to evaluate the efficiency of their possible application in technologies of complex purification of the environment from metal compounds and other inorganic toxicants. Bacteria were grown under anaerobic conditions in Kravtsov-Sorokin medium without SO42– and without Mohr’s salt for 10 days. To study the efficiency of sulfur, nitrate or nitrite ions’ reduction at simultaneous presence in the medium of Cr(VI) bacteria were sown in media with elemental sulfur, NaNO3, NaNO2 or K2Cr2O7 to final S0, NO3–, NO2–or Cr(VI) concentration in the medium of 3.47 (concentration of SO42– in medium of standard composition) or 1.74, 3.47, 5.21, 6.94 and 10.41 mM. Biomass was determined by the turbidimetric method, and the concentrations of nitrate, nitrite, ammonium ions, hydrogen sulfide, Cr(VI), Cr(ІІІ) in cultural liquid were determined spectrophotometrically. It has been established that Cr(VI) inhibits the biomass accumulation and hydrogen sulfide production by bacteria of Desulfuromonas sp. after simultaneous addition into the medium of 3.47 mM S0 and 1.74–10.41 mM Cr(VI). In the medium with the same initial content (3.47 mM) of S0 and Cr(VI) bacteria produced Cr(III) at concentrations 3.3–3.4 times higher than that of hydrogen sulfide. It has been shown that K2Cr2O7 inhibits biomass accumulation, nitrate ions’ reduction and ammonium ions’ production by bacteria after simultaneous addition into the medium of 3.47 mM NO3– and 1.74–10.41 mM Cr(VI) or 1.74–10.41 mM NO3– and 3.47 mM Cr(VI). In the medium with the same initial content (3.47 mM) of NO3– and Cr(VI) bacteria reduced up to 1.2 times more nitrate ions than Cr(VI) with the production of ammonium ions at concentrations the same times higher than those of Cr(III). It has been established that K2Cr2O7 inhibits biomass accumulation, nitrite ions’ reduction and ammonium ions’ production by bacteria after simultaneous addition into the medium of 3.47 mM NO2– and 1.74–10.41 mM Cr(VI) or 1.74–10.41 mM NO2– and 3.47 mM Cr(VI). In the medium with the same initial content of (3.47 mM) NO2– and Cr(VI) the reduction of Cr(VI) by bacteria was only slightly, up to 1.1 times, lower than the reduction of nitrite ions, almost the same concentrations of trivalent chromium and ammonium ions were detected in the cultural liquid. The processes of nitrate and nitride reduction carried out by bacteria of Desulfuromonas genus were revealed to be less sensitive to the negative influence of sodium dichromate, as compared with the process of sulfur reduction, because in the media with the same initial content (3.47 mM) of NO3– or NO2– and Cr(VI) bacteria produced 1.1–1.2 times more NH4+ than Cr(III), but in the medium with the same initial content (3.47 mM) of S0 and Cr(VI) ) bacteria produced over than three times more Cr(III) than hydrogen sulfide. Our data allow us to conclude that bacteria of Desulfuromonas genus, the investigated strains of which are adapted to high concentrations (up to 10.41 mM) of inorganic toxicants, play an important role in the geochemical cycles of sulfur, nitrogen and chromium in aquatic environments that have been under anthropogenic influence.
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Sharma P, Singh SP, Parakh SK, Tong YW. Health hazards of hexavalent chromium (Cr (VI)) and its microbial reduction. Bioengineered 2022; 13:4923-4938. [PMID: 35164635 PMCID: PMC8973695 DOI: 10.1080/21655979.2022.2037273] [Citation(s) in RCA: 86] [Impact Index Per Article: 43.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Industrial effluents/wastewater are the main sources of hexavalent chromium (Cr (VI)) pollutants in the environment. Cr (VI) pollution has become one of the world’s most serious environmental concerns due to its long persistence in the environment and highly deadly nature in living organisms. To its widespread use in industries Cr (VI) is highly toxic and one of the most common environmental contaminants. Cr (VI) is frequently non-biodegradable in nature, which means it stays in the environment for a long time, pollutes the soil and water, and poses substantial health risks to humans and wildlife. In living things, the hexavalent form of Cr is carcinogenic, genotoxic, and mutagenic. Physico-chemical techniques currently used for Cr (VI) removal are not environmentally friendly and use a large number of chemicals. Microbes have many natural or acquired mechanisms to combat chromium toxicity, such as biosorption, reduction, subsequent efflux, or bioaccumulation. This review focuses on microbial responses to chromium toxicity and the potential for their use in environmental remediation. Moreover, the research problem and prospects for the future are discussed in order to fill these gaps and overcome the problem associated with bacterial bioremediation’s real-time applicability.
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Affiliation(s)
- Pooja Sharma
- Environmental Research Institute, National University of Singapore, Singapore.,Energy and Environmental Sustainability for Megacities (E2S2) Phase II, Campus for Research Excellence and Technological Enterprise (Create), Singapore
| | - Surendra Pratap Singh
- Plant Molecular Biology Laboratory, Department of Botany, Dayanand Anglo-Vedic (PG) College, Chhatrapati Shahu Ji Maharaj University, Kanpur India
| | - Sheetal Kishor Parakh
- Environmental Research Institute, National University of Singapore, Singapore.,Energy and Environmental Sustainability for Megacities (E2S2) Phase II, Campus for Research Excellence and Technological Enterprise (Create), Singapore
| | - Yen Wah Tong
- Environmental Research Institute, National University of Singapore, Singapore.,Energy and Environmental Sustainability for Megacities (E2S2) Phase II, Campus for Research Excellence and Technological Enterprise (Create), Singapore.,Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore
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Mawang CI, Azman AS, Fuad ASM, Ahamad M. Actinobacteria: An eco-friendly and promising technology for the bioaugmentation of contaminants. BIOTECHNOLOGY REPORTS (AMSTERDAM, NETHERLANDS) 2021; 32:e00679. [PMID: 34660214 PMCID: PMC8503819 DOI: 10.1016/j.btre.2021.e00679] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 08/05/2021] [Accepted: 09/20/2021] [Indexed: 11/17/2022]
Abstract
Over the past two decades, various eco-friendly approaches utilizing microbial species to clean up contaminated environments have surfaced. In this aspect, actinobacteria have demonstrated their potential in contaminant degradation. The members of actinobacteria phylum exhibits a cosmopolitan distribution, which means that they can be found widely in both aquatic and terrestrial ecosystems. Actinobacteria play important ecological roles in the environment, such as degrading complex polymers, recycling compounds, and producing bioactive molecules. Hence, using actinobacteria to clean up contaminants is an attractive method in the field of biotechnology. This can be achieved through the green technology of bioaugmentation, whereby the degradative capacity of contaminated areas can be greatly improved through the introduction of specific microorganisms. This review describes actinobacteria as an eco-friendly and a promising technology for the bioaugmentation of contaminants, with focus on pesticides and heavy metals.
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Affiliation(s)
- Christina-Injan Mawang
- Acarology Unit, Infectious Disease Research Centre, Institute for Medical Research, Ministry of Health Malaysia, National Institutes of Health Complex, Setia Alam, Shah Alam, Selangor, 40170, Malaysia
| | - Adzzie-Shazleen Azman
- School of Science, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, Selangor, 47500, Malaysia
| | - Aalina-Sakiinah Mohd Fuad
- Department of Biomedical Science, Kulliyyah of Allied Health Sciences, International Islamic University Malaysia Kuantan Campus, Jalan Sultan Ahmad Shah, Bandar Indera Mahkota, Kuantan, Pahang 25200, Malaysia
| | - Mariana Ahamad
- Acarology Unit, Infectious Disease Research Centre, Institute for Medical Research, Ministry of Health Malaysia, National Institutes of Health Complex, Setia Alam, Shah Alam, Selangor, 40170, Malaysia
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Rajivgandhi G, Vimala RTV, Maruthupandy M, Alharbi NS, Kadaikunnan S, Khaled JM, Manoharan N, Li WJ. Enlightening the characteristics of bioflocculant of endophytic actinomycetes from marine algae and its biosorption of heavy metal removal. ENVIRONMENTAL RESEARCH 2021; 200:111708. [PMID: 34280417 DOI: 10.1016/j.envres.2021.111708] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 07/10/2021] [Accepted: 07/13/2021] [Indexed: 06/13/2023]
Abstract
The removal of toxic heavy metal ions from contaminated environments is a great challenge and requires an alternative rapid, efficient, economical bioremediation approach. Henceforth, bioflocculant producing endophytic actinobacterial sp. was isolated from heavy metal contaminated marine environments for heavy metal biosorption process. After molecular characterization, the isolated actinomycete starin was Nocardiopsis sp. GRG 3 (KT235642). It was indicated that the maximum flocculating activity of 80.90% with glucose, and yield is 4.52 g L1. The optimum flocculating activity was reached at pH 7 in the presence of CaCl2 ions. Further, the bioflocculent produced Nocardiopsis sp. GRG 3 (KT235642) was characterized by fourier transform infrared analysis spectra (FTIR) and displayed the presence of carboxyl, hydroxyl, amino groups and characteristic of more polysaccharide and protein. The heavy metal sorption by bioflocculant Nocardiopsis sp. GRG 3 (KT235642) was effectively removed 55.90% Cd, 85.90% Cr, 74.7% Pb, and 51.90% Hg. Therefore, this study was proved that the bioflocculant derived from endophytic actinobacteria, Nocardiopsis sp. GRG 3 (KT235642) as a effective alternative method for decreasing the heavy metals towards sustainable environmental management.
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Affiliation(s)
- Govindan Rajivgandhi
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-Sen University, Guangzhou, 510275, PR China; Department of Marine Science, Bharathidasan University, Tiruchirappalli, 620024, Tamil Nadu, India
| | - R T V Vimala
- Department of Biotechnology, Bharathidasan University, Tiruchirappalli, 620024, India.
| | - Muthuchamy Maruthupandy
- Lab of Toxicology, Department of Health Sciences, The Graduate School of Dong-A University, 37, Nakdong-Dearo 550 Beon-Gil, Saha-Gu Busan, 49315, South Korea
| | - Naiyf S Alharbi
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Shine Kadaikunnan
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Jamal M Khaled
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Natesan Manoharan
- Department of Marine Science, Bharathidasan University, Tiruchirappalli, 620024, Tamil Nadu, India.
| | - Wen-Jun Li
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-Sen University, Guangzhou, 510275, PR China; State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, PR China.
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Rahman Z, Thomas L. Chemical-Assisted Microbially Mediated Chromium (Cr) (VI) Reduction Under the Influence of Various Electron Donors, Redox Mediators, and Other Additives: An Outlook on Enhanced Cr(VI) Removal. Front Microbiol 2021; 11:619766. [PMID: 33584585 PMCID: PMC7875889 DOI: 10.3389/fmicb.2020.619766] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 12/16/2020] [Indexed: 12/13/2022] Open
Abstract
Chromium (Cr) (VI) is a well-known toxin to all types of biological organisms. Over the past few decades, many investigators have employed numerous bioprocesses to neutralize the toxic effects of Cr(VI). One of the main process for its treatment is bioreduction into Cr(III). Key to this process is the ability of microbial enzymes, which facilitate the transfer of electrons into the high valence state of the metal that acts as an electron acceptor. Many underlying previous efforts have stressed on the use of different external organic and inorganic substances as electron donors to promote Cr(VI) reduction process by different microorganisms. The use of various redox mediators enabled electron transport facility for extracellular Cr(VI) reduction and accelerated the reaction. Also, many chemicals have employed diverse roles to improve the Cr(VI) reduction process in different microorganisms. The application of aforementioned materials at the contaminated systems has offered a variety of influence on Cr(VI) bioremediation by altering microbial community structures and functions and redox environment. The collective insights suggest that the knowledge of appropriate implementation of suitable nutrients can strongly inspire the Cr(VI) reduction rate and efficiency. However, a comprehensive information on such substances and their roles and biochemical pathways in different microorganisms remains elusive. In this regard, our review sheds light on the contributions of various chemicals as electron donors, redox mediators, cofactors, etc., on microbial Cr(VI) reduction for enhanced treatment practices.
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Affiliation(s)
- Zeeshanur Rahman
- Department of Botany, Zakir Husain Delhi College, University of Delhi, Delhi, India
| | - Lebin Thomas
- Department of Botany, Hansraj College, University of Delhi, Delhi, India
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Gao J, Zhang X, Yu J, Lei Y, Zhao S, Jiang Y, Xu Z, Cheng J. Cr(VI) removal performance and the characteristics of microbial communities influenced by the core-shell maifanite/ZnAl-layered double hydroxides (LDHs) substrates for chromium-containing surface water. Biochem Eng J 2020. [DOI: 10.1016/j.bej.2020.107625] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Luo Y, Ye B, Ye J, Pang J, Xu Q, Shi J, Long B, Shi J. Ca 2+ and SO 42- accelerate the reduction of Cr(VI) by Penicillium oxalicum SL2. JOURNAL OF HAZARDOUS MATERIALS 2020; 382:121072. [PMID: 31470304 DOI: 10.1016/j.jhazmat.2019.121072] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 08/11/2019] [Accepted: 08/20/2019] [Indexed: 06/10/2023]
Abstract
Some ions in soils may affect the growth and metabolism of microorganisms and subsequently alter the remediation efficiency of Cr(VI). Here, the effects of different Ca2+ and SO42- levels on the reduction of Cr(VI) by Penicillium oxalicum SL2 were investigated. The results showed that Cr(VI) reduction by P. oxalicum SL2 in potato dextrose liquid (PDL) medium was accelerated by the presence of exogenous Ca2+ and SO42-. The Cr(VI) reduction rates were increased by 52.5% (200 mg L-1 Ca2+ treated) and 55.9% (2000 mg L-1 SO42- treated), respectively. High concentration of Ca2+ in medium resulted in the production of calcium oxalate crystals, which was contributed to the adsorption of chromium. In addition, X-ray absorption near-edge spectroscopy (XANES) analysis showed that P. oxalicum SL2 could reduce the toxicity of Cr(VI) by synthesizing cysteine (Cys) and reduced glutathione (GSH). The decrease of thiol compounds (Cys and GSH) in P. oxalicum SL2 mycelia treated with SO42- proved the alleviation of oxidative stress. In conclusion, exogenous Ca2+ could reduce the damage of Cr(VI) to P. oxalicum SL2 by maintaining the integrity of cell wall, and the addition of SO42- alleviated the Cr(VI) toxicity to P. oxalicum SL2, thus accelerating the reduction of Cr(VI).
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Affiliation(s)
- Yating Luo
- MOE Key laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Binhui Ye
- Chengbang Eco-Environment Co., Ltd., Hangzhou, 310002, China
| | - Jien Ye
- MOE Key laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Jingli Pang
- MOE Key laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Qiao Xu
- MOE Key laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Jingxuan Shi
- MOE Key laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Bibo Long
- Guangdong Bioengineering Institute, Guangzhou Sugarcane Industry Research Institute, Guangzhou, 510316, China
| | - Jiyan Shi
- MOE Key laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China.
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Mengke-Li, Yuting-Zhuo, Yuting-Hu, Shuzhen-Li, Liang-Hu, Hui-Zhong, Zhiguo-He. Exploration on the bioreduction mechanism of Cr(Ⅵ) by a gram-positive bacterium: Pseudochrobactrum saccharolyticum W1. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 184:109636. [PMID: 31536849 DOI: 10.1016/j.ecoenv.2019.109636] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 08/30/2019] [Accepted: 09/03/2019] [Indexed: 06/10/2023]
Abstract
Bioremediation of chromium (Cr(Ⅵ)) contaminations has been widely reported, but the research on its removal mechanism is still scarce. Studies on Cr(Ⅵ) removal by strains affiliated to genus Pseudochobactrum revealed the Cr(Ⅵ) efficiency removal through the reduction of Cr(Ⅵ) to Cr(Ⅲ). However, the location of Cr(Ⅵ) reduction reaction and exact mechanism are still unspecified. In this work, a Gram-positive bacterial strain, Pseudochrobactrum saccharolyticum W1 (P. saccharolyticum W1) was isolated and tested to remove approximately 53.7% of Cr(Ⅵ) (initial concentration was 200 mg L-1) from the MSM medium. Analysis of SEM-EDS and TEM-EDS indicated that chromium-containing particles precipitated both on the cell surface and in the cytoplasm. Batch experiments indicated that the heat-treated bacterial cells almost had no ability to remove Cr(Ⅵ) from solution, while the resting cells could remove 62.0% of Cr(Ⅵ) at the initial concentration of 10 mg L-1. Additionally, at this concentration, 64.8% and 70.8% of Cr(Ⅵ) was reduced by cell envelope components and intracellular soluble substances after 6 h, respectively. These results suggested that the removal of Cr(Ⅵ) by P. saccharolyticum W1 was through direct reduction, which occurred on both cell envelop and cytoplasm. The results also showed that cytoplasm was the main site for Cr(Ⅵ) reduction compared to the cell envelop. Further analysis of FTIR and XPS verified that C-H, C-C, CO, C-OH and C-O-C groups of cells involved in correlation with chromium during Cr(Ⅵ) reduction. The study offered an insight into the Cr(VI) reduction mechanism of P. saccharolyticum W1.
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Li M, He Z, Hu Y, Hu L, Zhong H. Both cell envelope and cytoplasm were the locations for chromium(VI) reduction by Bacillus sp. M6. BIORESOURCE TECHNOLOGY 2019; 273:130-135. [PMID: 30423496 DOI: 10.1016/j.biortech.2018.11.006] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Revised: 10/30/2018] [Accepted: 11/02/2018] [Indexed: 06/09/2023]
Abstract
Biotreatment is an effective way in remediation of chromium(VI) (Cr(VI)) contamination, but its mechanism and reaction sites are still not clear. Herein, Bacillus sp. M6 was used as a model bacterium in this study to investigate the removal mechanism of Cr(VI) in solution. The results showed that the removal of Cr(VI) was attributed to direct reduction by Bacillus sp. M6, and the reduction locations occurred both on the cell envelope and in the cytoplasm. Meanwhile, bioanalysis of Bacillus sp. M6 by SEM-EDS and TEM-EDS, indicated that Cr(III)-containing precipitates distributed both on the surface and in the cytoplasm of Bacillus sp. In addition, XPS analysis demonstrated that the chromium could be bound to cells by coordination with functional groups (C-based and O-based) on the bacterial surface. This work offers a new and deep insight into the mechanism of Cr(VI) reduction by Bacillus sp.
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Affiliation(s)
- Mengke Li
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Zhiguo He
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Yuting Hu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Liang Hu
- School of Minerals Processing and Bioengineering, Key Laboratory of Biohydrometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Hui Zhong
- School of Life Science, Central South University, Changsha 410012, China.
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Kang C, Wu P, Li L, Yu L, Ruan B, Gong B, Zhu N. Cr(VI) reduction and Cr(III) immobilization by resting cells of Pseudomonas aeruginosa CCTCC AB93066: spectroscopic, microscopic, and mass balance analysis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:5949-5963. [PMID: 28070813 DOI: 10.1007/s11356-016-8356-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2016] [Accepted: 12/29/2016] [Indexed: 06/06/2023]
Abstract
The aim of this study was to investigate the mechanism of Cr(VI) reduction and Cr(III) immobilization by resting cells of Pseudomonas aeruginosa using batch experiments and analysis techniques. Data showed that resting cells of this strain (3.2 g/L dry weight) reduced 10 mg/L of Cr(VI) by 86% in Tris-HCl buffer solution under optimized conditions of 5 g/L of sodium acetate as an electron donor, pH of 7.0 and temperature of 37 °C within 24 h. Cr(VI) was largely converted to nontoxic Cr(III), and both soluble crude cell-free extracts and membrane-associated fractions were responsible for Cr(VI) reduction. While remnant Cr(VI) existed only in the supernatant, the content of resultant Cr(III) in supernatant, on cell surface and inside cells was 2.62, 1.06, and 5.07 mg/L, respectively, which was an indicative of extracellular and intracellular reduction of chromate. Scanning electron microscopy analysis combined with energy dispersive X-ray spectroscopy revealed the adsorption of chromium on the bacterial surface. Interaction between Cr(III) and cell surface functional groups immobilized Cr(III) as indicated by Fourier transform infrared analyses and X-ray photoelectron spectroscopy. Transmission electron microscopy revealed Cr(III) precipitates in bacterial interior suggesting that Cr(II) could also be intracellularly accumulated. Thus, it can be concluded that interior and exterior surfaces of resting P. aeruginosa cells were sites for reduction and immobilization of Cr(VI) and Cr(III), respectively. This is further insight into the underlying mechanisms of microbial chromate reduction.
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Affiliation(s)
- Chunxi Kang
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, People's Republic of China
| | - Pingxiao Wu
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, People's Republic of China.
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, People's Republic of China.
- Guangdong Provincial Engineering and Technology Research Centre for Environmental Risk Prevention and Emergency Disposal, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 51006, People's Republic of China.
- Guangdong Environmental Protection Key Lab of Solid Waste Treatment and Recycling, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, People's Republic of China.
| | - Liping Li
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, People's Republic of China
| | - Langfeng Yu
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, People's Republic of China
| | - Bo Ruan
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, People's Republic of China
| | - Beini Gong
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, People's Republic of China
| | - Nengwu Zhu
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, People's Republic of China
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, People's Republic of China
- Guangdong Provincial Engineering and Technology Research Centre for Environmental Risk Prevention and Emergency Disposal, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 51006, People's Republic of China
- Guangdong Environmental Protection Key Lab of Solid Waste Treatment and Recycling, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, People's Republic of China
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13
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Economical fermentation media for the production of a whole cell catalyst for the treatment of Cr(VI)-containing wastewaters. Rev Argent Microbiol 2016; 48:245-251. [PMID: 27567522 DOI: 10.1016/j.ram.2016.04.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 04/08/2016] [Accepted: 04/15/2016] [Indexed: 11/23/2022] Open
Abstract
The biotechnology sector is continually seeking sustainable and more economical bioprocesses. Fermentation media produced with cheap components or wastes reduce production costs. Moreover, if wastes are used, they contribute to avoid environmental pollution. In this work, microbial growth media based on molasses or acidified glycerol as carbon sources and fertilizer as nitrogen source were tested for the production of a whole-cell catalyst that could be used in Cr(VI)-containing wastewater treatments. Results showed that the highest biomass production yield was obtained with a medium containing acidified glycerol 5% v/v and fertilizer 0.6% v/v. The biomass produced using this medium was immobilized in calcium alginate beads and used as catalyst in the biotransformation of Cr(VI) into Cr(III). The catalyst could be efficiently used for 5 reduction cycles of 40mg/l Cr(VI) each. Cr(III) retention assays were performed to determine whether Cr(III) could be retained by the catalyst avoiding its solubilization in the supernatants. The retention capacity of the catalyst at 32°C and pH 3.0 was 3mg Cr(III)/g. Both an alternative and economical fermentation medium is here proposed for the optimization of Cr(VI)-containing wastewater treatment.
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14
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Bonilla JO, Callegari EA, Delfini CD, Estevez MC, Villegas LB. Simultaneous chromate and sulfate removal by Streptomyces sp. MC1. Changes in intracellular protein profile induced by Cr(VI). J Basic Microbiol 2016; 56:1212-1221. [PMID: 27283205 DOI: 10.1002/jobm.201600170] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Accepted: 05/20/2016] [Indexed: 11/06/2022]
Abstract
The purpose of this study was to investigate the influence of increasing sulfate concentrations on chromium removal, to evaluate the effect of the presence of Cr(VI) on sulfate removal by Streptomyces sp. MC1 and to analyze the differential protein expression profile in the presence of this metal for the identification of proteins repressed or overexpressed. In the presence of Cr(VI) but in the absence of sulfate ions, bacterial growth was negligible, showing the Cr(VI) toxicity for this bacterium. However, the sulfate presence stimulated bacterium growth and Cr(VI) removal, regardless of its concentrations. Streptomyces sp. MC1 showed ability to remove chromium and sulfate simultaneously. Also, the sulfate presence favored the decrease of total chromium concentration from supernatants reaching a decrease of 50% at 48 h. In presence of chromium, seven proteins were down-expressed and showed homology to proteins involved in protein biosynthesis, energy production and free radicals detoxification while two proteins involved in oxidation-reduction processes identified as dihydrolipoamide dehydrogenase and S-adenosyl-l-methionine synthase were overexpressed.
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Affiliation(s)
- José Oscar Bonilla
- Instituto de Quimica San Luis (INQUISAL) CONICET, San Luis, Argentina.,Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, San Luis, Argentina
| | - Eduardo Alberto Callegari
- Division of Basic Biomedical Sciences Sanford School of Medicine, University of South Dakota, Vermillion, SD, USA
| | | | - María Cristina Estevez
- Planta Piloto de Procesos Industriales y Microbiológicos (PROIMI), CONICET, Tucumán, Argentina.,Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Tucumán, Argentina
| | - Liliana Beatriz Villegas
- Instituto de Quimica San Luis (INQUISAL) CONICET, San Luis, Argentina.,Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, San Luis, Argentina
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15
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El-Gendy MMAA, El-Bondkly AMA. Evaluation and enhancement of heavy metals bioremediation in aqueous solutions by Nocardiopsis sp. MORSY1948, and Nocardia sp. MORSY2014. Braz J Microbiol 2016; 47:571-86. [PMID: 27245130 PMCID: PMC4927648 DOI: 10.1016/j.bjm.2016.04.029] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Accepted: 02/20/2016] [Indexed: 11/28/2022] Open
Abstract
An analysis of wastewater samples collected from different industrial regions of Egypt demonstrated dangerously high levels of nickel (0.27-31.50mgL(-1)), chromium (1.50-7.41mgL(-1)) and zinc (1.91-9.74mgL(-1)) in the effluents. Alarmingly, these heavy metals are among the most toxic knownones to humans and wildlife. Sixty-nine Actinomycete isolates derived from contaminated sites were evaluated under single, binary, and ternary systems for their biosorption capacity for Ni(2+), Cr(6+) and Zn(2+) from aqueous solutions. The results of the study identified isolates MORSY1948 and MORSY2014 as the most active biosorbents. Phenotypic and chemotypic characterization along with molecular phylogenetic evidence confirmed that the two strains are members of the Nocardiopsis and Nocardia genera, respectively. The results also proved that for both the strains, heavy metal reduction was more efficient with dead rather than live biomass. The affinity of the dead biomass of MORSY1948 strain for Ni(2+), Cr(6+) and Zn(2+) under the optimized pH conditions of 7, 8 and 7, respectively at 40°C temperature with 0.3% biosorbent dosage was found to be as follows: Ni(2+) (87.90%)>Zn(2+) (84.15%)>Cr(6+) (63.75%). However, the dead biomass of MORSY2014 strain under conditions of pH 8 and 50°C temperature with 0.3% biosorbent dose exhibited the highest affinity which was as follows: Cr(6+) (95.22%)>Ni(2+) (93.53%)>Zn(2+) (90.37%). All heavy metals under study were found to be removed from aqueous solutions in entirety when the sorbent dosage was increased to 0.4%.
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Affiliation(s)
- Mervat Morsy Abbas Ahmed El-Gendy
- Department of Biological Sciences, Faculty of Sciences, King Abdulaziz University (KAU), Jeddah, Saudi Arabia; Chemistry of Natural and Microbial Products Department, National Research Centre, Dokki, Giza, Egypt
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16
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Yuan Y, Yang S, Zhou D, Wu F. A simple Cr(VI)-S(IV)-O2 system for rapid and simultaneous reduction of Cr(VI) and oxidative degradation of organic pollutants. JOURNAL OF HAZARDOUS MATERIALS 2016; 307:294-301. [PMID: 26799220 DOI: 10.1016/j.jhazmat.2016.01.012] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 12/18/2015] [Accepted: 01/07/2016] [Indexed: 06/05/2023]
Abstract
Hexavalent chromium (Cr(VI)), a heavy-metal contaminant, can be easily reduced to less toxic trivalent chromium (Cr(III)) by sulfite ions (S(IV)). However, S(IV) has not drawn as much attention as the ferrous ion has. We report herein a novel Cr(VI)-S(IV)-O2 system containing sulfite ions that rapidly and simultaneously reduces Cr(VI) and oxidize organic pollutants in the presence of oxygen in aqueous solutions. This Cr(VI)-S(IV)-O2 system contains the initiator Cr(VI), the reductant S(IV), and the oxidant O2, which produce oxysulfur radicals (mainly SO4(-) and SO5(-)) and hydroxyl radicals (OH). The Cr(VI)/S(IV) molar ratio, pH, and oxygen content play important roles in the entire reaction system. Acidic conditions (pH 3.0) facilitated degradation of organic compounds and reduction of Cr(VI) as well. In addition, experiments of rapid degradation of several kinds of organic pollutants such as azo dye (acid orange 7, AO7), aniline, phenol, bisphenol A etc were also conducted. Preliminary results show that the removal rates of the analogs of phenols or aromatic amines in this Cr(VI)-S(IV)-O2 system have a relationship with the electronic parameters (Hammett constant, σ) of the substituted groups. Thus, the Cr(VI)-S(IV)-O2 system, provides an excellent strategy of "waste control by waste" for removing multiple industrial contaminants.
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Affiliation(s)
- Yanan Yuan
- Department of Environmental Science, Hubei Key Lab of Biomass Resource Chemistry and Environmental Biotechnology, School of Resources and Environmental Science, Wuhan University, 430079, PR China
| | - Shaojie Yang
- Department of Environmental Science, Hubei Key Lab of Biomass Resource Chemistry and Environmental Biotechnology, School of Resources and Environmental Science, Wuhan University, 430079, PR China
| | - Danna Zhou
- Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, PR China.
| | - Feng Wu
- Department of Environmental Science, Hubei Key Lab of Biomass Resource Chemistry and Environmental Biotechnology, School of Resources and Environmental Science, Wuhan University, 430079, PR China
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17
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Li N, Pan Y, Zhang N, Wang X, Zhou W. The bio-reduction of chromate with periplasmic reductase using a novel isolated strain Pseudoalteromonas sp. CF10-13. RSC Adv 2016. [DOI: 10.1039/c6ra16320c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel isolated bacteriumPseudoalteromonassp. CF10-13 could reduce Cr(vi) to Cr(iii) by periplasic reductase with Cr(iii) bound to functional groups in extracellular polymeric substance (EPS) or leached to media as soulbe organic-Cr(iii).
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Affiliation(s)
- Na Li
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250100
- China
| | - Yanzhuo Pan
- Jinan Licheng No. 2 High School
- Jinan 250104
- China
| | - Na Zhang
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250100
- China
| | - Xueyan Wang
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250100
- China
| | - Weizhi Zhou
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250100
- China
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18
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Dey S, Kanti Paul A. Assessment of heavy metal tolerance and hexavalent chromium reducing potential of Corynebacterium paurometabolum SKPD 1204 isolated from chromite mine seepage. AIMS BIOENGINEERING 2016. [DOI: 10.3934/bioeng.2016.3.337] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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19
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Malaviya P, Singh A. Bioremediation of chromium solutions and chromium containing wastewaters. Crit Rev Microbiol 2014; 42:607-33. [DOI: 10.3109/1040841x.2014.974501] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Piyush Malaviya
- Department of Environmental Sciences, University of Jammu, Jammu, India
| | - Asha Singh
- Department of Environmental Sciences, University of Jammu, Jammu, India
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20
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Montero-Calasanz MDC, Hofner B, Göker M, Rohde M, Spröer C, Hezbri K, Gtari M, Schumann P, Klenk HP. Geodermatophilus poikilotrophi sp. nov.: a multitolerant actinomycete isolated from dolomitic marble. BIOMED RESEARCH INTERNATIONAL 2014; 2014:914767. [PMID: 25114928 PMCID: PMC4119925 DOI: 10.1155/2014/914767] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Revised: 06/03/2014] [Accepted: 06/09/2014] [Indexed: 12/02/2022]
Abstract
A novel Gram-reaction-positive, aerobic actinobacterium, tolerant to mitomycin C, heavy metals, metalloids, hydrogen peroxide, desiccation, and ionizing- and UV-radiation, designated G18T, was isolated from dolomitic marble collected from outcrops in Samara (Namibia). The growth range was 15-35°C, at pH 5.5-9.5 and in presence of 1% NaCl, forming greenish-black coloured colonies on GYM Streptomyces agar. Chemotaxonomic and molecular characteristics of the isolate matched those described for other representatives of the genus Geodermatophilus. The peptidoglycan contained meso-diaminopimelic acid as diagnostic diaminoacid. The main phospholipids were phosphatidylethanolamine, phosphatidylcholine, phosphatidylinositol, and small amount of diphosphatidylglycerol. MK-9(H4) was the dominant menaquinone and galactose was detected as diagnostic sugar. The major cellular fatty acids were branched-chain saturated acids iso-C16:0 and iso-C15:0 and the unsaturated C17:1 ω8c and C16:1 ω7c. The 16S rRNA gene showed 97.4-99.1% sequence identity with the other representatives of genus Geodermatophilus. Based on phenotypic results and 16S rRNA gene sequence analysis, strain G18T is proposed to represent a novel species, Geodermatophilus poikilotrophi. Type strain is G18T (=DSM 44209T=CCUG 63018T). The INSDC accession number is HF970583. The novel R software package lethal was used to compute the lethal doses with confidence intervals resulting from tolerance experiments.
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Affiliation(s)
- Maria del Carmen Montero-Calasanz
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
- Instituto de Investigacióon y Formacióon Agraria y Pesquera (IFAPA), Centro Las Torres-Tomejil, Carretera Sevilla-Cazalla de la Sierra, Km 12.2, 41200 Alcalá del Río, Sevilla, Spain
| | - Benjamin Hofner
- Institut für Medizininformatik, Biometrie und Epidemiologie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Waldstraße 6, 91054 Erlangen, Germany
| | - Markus Göker
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
| | - Manfred Rohde
- Helmholtz Centre for Infection Research (HZI), Inhoffenstraße 7, 38124 Braunschweig, Germany
| | - Cathrin Spröer
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
| | - Karima Hezbri
- Laboratoire Microorganismes et Biomolécules Actives, Université de Tunis Elmanar (FST) et Université de Carthage (INSAT), 2092 Tunis, Tunisia
| | - Maher Gtari
- Laboratoire Microorganismes et Biomolécules Actives, Université de Tunis Elmanar (FST) et Université de Carthage (INSAT), 2092 Tunis, Tunisia
| | - Peter Schumann
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
| | - Hans-Peter Klenk
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
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21
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Kang C, Wu P, Li Y, Ruan B, Zhu N, Dang Z. Estimates of heavy metal tolerance and chromium(VI) reducing ability of Pseudomonas aeruginosa CCTCC AB93066: chromium(VI) toxicity and environmental parameters optimization. World J Microbiol Biotechnol 2014; 30:2733-46. [DOI: 10.1007/s11274-014-1697-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Accepted: 06/25/2014] [Indexed: 11/28/2022]
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22
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Tahri Joutey N, Bahafid W, Sayel H, Ananou S, El Ghachtouli N. Hexavalent chromium removal by a novel Serratia proteamaculans isolated from the bank of Sebou River (Morocco). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:3060-3072. [PMID: 24194414 DOI: 10.1007/s11356-013-2249-x] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2013] [Accepted: 10/15/2013] [Indexed: 06/02/2023]
Abstract
The novel Serratia proteamaculans isolated from a chromium-contaminated site was tolerant to a concentration of 500 mg Cr(VI)/l. The optimum pH and temperature for reduction of Cr(VI) by S. proteamaculans were found to be 7.0 and 30 °C, respectively. The Cr(VI) reduction rate decreased with the increase in Cr(VI) concentration from 100 to 400 mg/l, suggesting the enzymatic chromium reduction. Resting and permeabilised cell assays provided the better evidence that chromate reduction in S. proteamaculans is enzymatic. Reduction by cell-free filtrate shows no extracellular chromate-reducing activity, revealing that this activity may be associated to membrane fraction and/or cytosolic fraction. Assays conducted with cytosolic and particulate fraction of S. proteamaculans confirmed the role of membrane-bound proteins in Cr(VI) reduction. Furthermore, chromium reduced by heat-treated cells suggests that membrane-associated chromate reductase activity of S. proteamaculans is preceded by its adsorption on the cell surface.
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Affiliation(s)
- Nezha Tahri Joutey
- Microbial Biotechnology Laboratory, Faculty of Sciences and Techniques, Sidi Mohamed Ben Abdellah University, Route Immouzer, P. O. Box 2202, Fez, Morocco
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23
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Othman AR, Bakar NA, Halmi MIE, Johari WLW, Ahmad SA, Jirangon H, Syed MA, Shukor MY. Kinetics of molybdenum reduction to molybdenum blue by Bacillus sp. strain A.rzi. BIOMED RESEARCH INTERNATIONAL 2013; 2013:371058. [PMID: 24369531 PMCID: PMC3863505 DOI: 10.1155/2013/371058] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2013] [Accepted: 10/28/2013] [Indexed: 11/18/2022]
Abstract
Molybdenum is very toxic to agricultural animals. Mo-reducing bacterium can be used to immobilize soluble molybdenum to insoluble forms, reducing its toxicity in the process. In this work the isolation of a novel molybdate-reducing Gram positive bacterium tentatively identified as Bacillus sp. strain A.rzi from a metal-contaminated soil is reported. The cellular reduction of molybdate to molybdenum blue occurred optimally at 4 mM phosphate, using 1% (w/v) glucose, 50 mM molybdate, between 28 and 30 °C and at pH 7.3. The spectrum of the Mo-blue product showed a maximum peak at 865 nm and a shoulder at 700 nm. Inhibitors of bacterial electron transport system (ETS) such as rotenone, sodium azide, antimycin A, and potassium cyanide could not inhibit the molybdenum-reducing activity. At 0.1 mM, mercury, copper, cadmium, arsenic, lead, chromium, cobalt, and zinc showed strong inhibition on molybdate reduction by crude enzyme. The best model that fitted the experimental data well was Luong followed by Haldane and Monod. The calculated value for Luong's constants p max, K(s), S(m), and n was 5.88 μmole Mo-blue hr(-1), 70.36 mM, 108.22 mM, and 0.74, respectively. The characteristics of this bacterium make it an ideal tool for bioremediation of molybdenum pollution.
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Affiliation(s)
- A. R. Othman
- Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - N. A. Bakar
- Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - M. I. E. Halmi
- Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - W. L. W. Johari
- Department of Environmental Science, Faculty of Environmental Studies, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - S. A. Ahmad
- Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - H. Jirangon
- Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - M. A. Syed
- Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - M. Y. Shukor
- Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia
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24
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Javaid M, Sultan S. Plant growth promotion traits and Cr (VI) reduction potentials of Cr (VI) resistantStreptomycesstrains. J Basic Microbiol 2012; 53:420-8. [DOI: 10.1002/jobm.201200032] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2012] [Accepted: 02/16/2012] [Indexed: 11/10/2022]
Affiliation(s)
- Mahwish Javaid
- Department of Microbiology and Molecular Genetics; University of the Punjab, Quaid-e-Azam Campus; Lahore; 54590; Pakistan
| | - Sikander Sultan
- Department of Microbiology and Molecular Genetics; University of the Punjab, Quaid-e-Azam Campus; Lahore; 54590; Pakistan
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25
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Sugiyama T, Sugito H, Mamiya K, Suzuki Y, Ando K, Ohnuki T. Hexavalent chromium reduction by an actinobacterium Flexivirga alba ST13T in the family Dermacoccaceae. J Biosci Bioeng 2012; 113:367-71. [DOI: 10.1016/j.jbiosc.2011.11.009] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2011] [Accepted: 11/08/2011] [Indexed: 11/29/2022]
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26
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Gtari M, Essoussi I, Maaoui R, Sghaier H, Boujmil R, Gury J, Pujic P, Brusetti L, Chouaia B, Crotti E, Daffonchio D, Boudabous A, Normand P. Contrasted resistance of stone-dwelling Geodermatophilaceae species to stresses known to give rise to reactive oxygen species. FEMS Microbiol Ecol 2012; 80:566-77. [DOI: 10.1111/j.1574-6941.2012.01320.x] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2011] [Revised: 01/24/2012] [Accepted: 01/25/2012] [Indexed: 11/30/2022] Open
Affiliation(s)
- Maher Gtari
- Laboratoire Microorganismes et Biomolécules Actives; Université de Tunis Elmanar (FST) et Université de Carthage (ISSTE); Tunis; Tunisia
| | - Imen Essoussi
- Laboratoire Microorganismes et Biomolécules Actives; Université de Tunis Elmanar (FST) et Université de Carthage (ISSTE); Tunis; Tunisia
| | - Radhi Maaoui
- Laboratoire Microorganismes et Biomolécules Actives; Université de Tunis Elmanar (FST) et Université de Carthage (ISSTE); Tunis; Tunisia
| | - Haïtham Sghaier
- Unité de Microbiologie et de Biologie Moléculaire; Centre National des Sciences et Technologies Nucléaires (CNSTN); Sidi Thabet; Tunisia
| | - Rabeb Boujmil
- Laboratoire Microorganismes et Biomolécules Actives; Université de Tunis Elmanar (FST) et Université de Carthage (ISSTE); Tunis; Tunisia
| | - Jérôme Gury
- IPREM UMR CNRS 5254; IBEAS - UFR Sciences et Techniques; Université de Pau et des Pays de l'Adour; Pau; France
| | - Petar Pujic
- Ecologie Microbienne; Centre National de la Recherche Scientifique UMR 5557; Université Lyon I; Université Lyon; Villeurbanne; France
| | - Lorenzo Brusetti
- Faculty of Science and Technology; Free University of Bozen/Bolzano; Bolzano; Italy
| | - Bessem Chouaia
- Dipartimento di Scienze e Tecnologie Alimentari e Microbiologiche (DiSTAM); Università degli Studi di Milano; Milan; Italy
| | - Elena Crotti
- Dipartimento di Scienze e Tecnologie Alimentari e Microbiologiche (DiSTAM); Università degli Studi di Milano; Milan; Italy
| | - Daniele Daffonchio
- Dipartimento di Scienze e Tecnologie Alimentari e Microbiologiche (DiSTAM); Università degli Studi di Milano; Milan; Italy
| | - Abdellatif Boudabous
- Laboratoire Microorganismes et Biomolécules Actives; Université de Tunis Elmanar (FST) et Université de Carthage (ISSTE); Tunis; Tunisia
| | - Philippe Normand
- Ecologie Microbienne; Centre National de la Recherche Scientifique UMR 5557; Université Lyon I; Université Lyon; Villeurbanne; France
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Shi Y, Chai L, Yang Z, Jing Q, Chen R, Chen Y. Identification and hexavalent chromium reduction characteristics of Pannonibacter phragmitetus. Bioprocess Biosyst Eng 2011; 35:843-50. [PMID: 22179413 DOI: 10.1007/s00449-011-0668-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2011] [Accepted: 12/02/2011] [Indexed: 11/30/2022]
Abstract
A hexavalent chromium [Cr(VI)] reducing bacterial strain was isolated from chromium-containing slag. It was identified as Pannonibacter phragmitetus based on physiological, biochemical characteristics and 16S rRNA gene sequence analysis. This bacterium displayed great Cr(VI) reduction capability. The Cr(VI) could be completely removed in 24 h under anaerobic condition when the initial concentration was 1,917 mg L(-1), with the maximum reduction rate of 562.8 mg L(-1) h(-1). The Cr(VI) reduction rate increased with the increase of Cr(VI) concentration. P. phragmitetus was able to use many carbon sources such as lactose, fructose, glucose, pyruvate, citrate, formate, lactate, NADPH and NADH as electron donors, among which the lactate had the greatest power to promote the reduction process. Zn(2+), Cd(2+) and Ni(2+) inhibited, while Cu(2+), Pb(2+), Mn(2+) and Co(2+) stimulated the reduction. The optimum pH and temperature for reduction were 9.0 and 30 °C, respectively. The results indicated that this strain had great potential for application in the bioremediation of chromate-polluted soil and water systems.
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Affiliation(s)
- Yan Shi
- School of Metallurgical Science and Engineering, Central South University, Changsha, Hunan, China
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Joutey NT, Bahafid W, Sayel H, Abed SE, Ghachtouli NE. Remediation of hexavalent chromium by consortia of indigenous bacteria from tannery waste-contaminated biotopes in Fez, Morocco. ACTA ACUST UNITED AC 2011. [DOI: 10.1080/00207233.2011.623855] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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29
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Lim HK, Syed MA, Shukor MY. Reduction of molybdate to molybdenum blue by Klebsiella sp. strain hkeem. J Basic Microbiol 2011; 52:296-305. [DOI: 10.1002/jobm.201100121] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2011] [Accepted: 05/10/2011] [Indexed: 11/06/2022]
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30
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Toxic chromate reduction by resistant and sensitive bacteria isolated from tannery effluent contaminated soil. ANN MICROBIOL 2011. [DOI: 10.1007/s13213-011-0235-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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31
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Chromate reductase activity of the Paracoccus denitrificans ferric reductase B (FerB) protein and its physiological relevance. Arch Microbiol 2010; 192:919-26. [PMID: 20821194 DOI: 10.1007/s00203-010-0622-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2010] [Revised: 08/07/2010] [Accepted: 08/18/2010] [Indexed: 10/19/2022]
Abstract
The homodimeric flavoprotein FerB of Paracoccus denitrificans catalyzed the reduction of chromate with NADH as electron donor. When present, oxygen was reduced concomitantly with chromate. The recombinant enzyme had a maximum activity at pH 5.0. The stoichiometric ratio of NADH oxidized to chromate reduced was found to be 1.53 ± 0.09 (O(2) absent) or > 2 (O(2) present), the apparent K (M) value for chromate amounted to 70 ± 10 μM with the maximum rate of 2.9 ± 0.3 μmol NADH s(-1) (mg protein)(-1). Diode-array spectrophotometry and experiments with one-electron acceptors provided evidence for oxygen consumption being due to a flavin semiquinone, formed transiently during the interaction of FerB with chromate. At the whole-cell level, a ferB mutant strain displayed only slightly diminished rate of chromate reduction when compared to the wild-type parental strain. Anaerobically grown cells were more active than cells grown aerobically. The activity could be partly inhibited by antimycin, suggesting an involvement of the respiratory chain. Chromate concentrations above ten micromolars transiently slowed or halted culture growth, with the effect being more pronounced for the mutant strain. It appears, therefore, that, rather than directly reducing chromate, FerB confers a protection of cells against the oxidative stress accompanying chromate reduction. With a strain carrying the chromosomally integrated ferB promoter-lacZ fusion, it was shown that the ferB gene is not inducible by chromate.
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Lin YB, Wang XY, Li HF, Wang NN, Wang HX, Tang M, Wei GH. Streptomyces zinciresistens sp. nov., a zinc-resistant actinomycete isolated from soil from a copper and zinc mine. Int J Syst Evol Microbiol 2010; 61:616-620. [PMID: 20400670 DOI: 10.1099/ijs.0.024018-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A filamentous actinomycete, designated strain CCNWNQ 0016(T), was isolated from soil from a zinc and copper mine in Shaanxi province, north-western China. A polyphasic taxonomic study was carried out to establish the status of strain CCNWNQ 0016(T). Chemical and morphological properties of the isolate were similar to those of species of the genus Streptomyces. Analysis of the almost complete 16S rRNA gene sequence placed strain CCNWNQ 0016(T) in the genus Streptomyces where it formed a distinct phyletic line with recognized species of this genus. The strain exhibited highest sequence similarities to Streptomyces niveoruber NBRC 15428(T) (98.8 %), Streptomyces griseoviridis NBRC 12874(T) (98.7 %) and Streptomyces aurantiogriseus NBRC 12842(T) (98.7 %). Furthermore, DNA-DNA hybridization studies between the novel isolate and these three strains showed relatedness values of 49.6 ± 0.6, 47.2 ± 0.9 and 46.9 ± 1.1 %, respectively. A number of phenotypic properties also enabled the isolate to be differentiated from related species of the genus Streptomyces. Therefore, it is proposed that strain CCNWNQ 0016(T) (=K42(T) =ACCC 41871(T) =HAMBI 3107(T)) should be classified as the type strain of a novel species in the genus Streptomyces, Streptomyces zinciresistens sp. nov. The maximum level of resistance to Zn²+ for strain CCNWNQ 0016(T) is 35 mM.
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Affiliation(s)
- Yan Bing Lin
- College of Life Sciences, Shaanxi Key Laboratory of Molecular Biology for Agriculture, Northwest A & F University, Yangling, Shaanxi 712100, PR China
| | - Xin Ye Wang
- College of Life Sciences, Shaanxi Key Laboratory of Molecular Biology for Agriculture, Northwest A & F University, Yangling, Shaanxi 712100, PR China
| | - Hui Fen Li
- College of Life Sciences, Shaanxi Key Laboratory of Molecular Biology for Agriculture, Northwest A & F University, Yangling, Shaanxi 712100, PR China
| | - Na Na Wang
- College of Life Sciences, Shaanxi Key Laboratory of Molecular Biology for Agriculture, Northwest A & F University, Yangling, Shaanxi 712100, PR China
| | - Hu Xuan Wang
- College of Life Sciences, Shaanxi Key Laboratory of Molecular Biology for Agriculture, Northwest A & F University, Yangling, Shaanxi 712100, PR China
| | - Ming Tang
- College of Life Sciences, Shaanxi Key Laboratory of Molecular Biology for Agriculture, Northwest A & F University, Yangling, Shaanxi 712100, PR China
| | - Ge-Hong Wei
- College of Life Sciences, Shaanxi Key Laboratory of Molecular Biology for Agriculture, Northwest A & F University, Yangling, Shaanxi 712100, PR China
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Xie B, Yang J, Yang Q. Isolation and characterization of an efficient nitro-reducing bacterium, Streptomyces mirabils DUT001, from soil. World J Microbiol Biotechnol 2009. [DOI: 10.1007/s11274-009-0243-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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