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Castilla-Alcantara JC, Posada-Baquero R, Ortega-Calvo JJ. Taxis-mediated bacterial transport and its implication for the cometabolism of pyrene in a model aquifer. WATER RESEARCH 2024; 248:120850. [PMID: 37976951 DOI: 10.1016/j.watres.2023.120850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 09/28/2023] [Accepted: 11/07/2023] [Indexed: 11/19/2023]
Abstract
One of the main problems in contaminated soils is that many toxic substances, such as PAHs, which are found in areas close to aquifers and groundwater, are difficult to access and degrade via traditional methods of remediation. The use of controlled bacterial mobility through chemotaxis has been shown to be efficient in increasing the dispersion of pollutant-degrading organisms, increasing the biodegradation rates of pollutants. In this study, using percolation columns as model aquifers, the mobilization of the Pseudomonas putida G7 strain to a distant pyrene source was demonstrated using γ-aminobutyric acid and artificial root exudates as strong chemoeffectors. An increase in the biodegradation rates of the pollutant was observed relative to columns in which the tactic effector was not added. The presence of different metabolites was detected via a fraction collector associated with an HPLC system, providing evidence for the cometabolic capacity of strain G7. The use of chemotactic organisms can be an effective approach for the remediation of polluted sediments associated with aquifers and groundwaters, offering new possibilities for the treatment of contaminated aqueous areas.
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Affiliation(s)
- Jose Carlos Castilla-Alcantara
- Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS-CSIC), Avda. Reina Mercedes 10, E-41012, Seville, Spain
| | - Rosa Posada-Baquero
- Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS-CSIC), Avda. Reina Mercedes 10, E-41012, Seville, Spain
| | - Jose Julio Ortega-Calvo
- Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS-CSIC), Avda. Reina Mercedes 10, E-41012, Seville, Spain.
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2
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Ma W, Zhang X, Han H, Shi X, Kong Q, Yu T, Zhao F. Overview of enhancing biological treatment of coal chemical wastewater: New strategies and future directions. J Environ Sci (China) 2024; 135:506-520. [PMID: 37778822 DOI: 10.1016/j.jes.2022.11.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 11/07/2022] [Accepted: 11/14/2022] [Indexed: 10/03/2023]
Abstract
Coal chemical wastewater (CCW) is a type of refractory industrial wastewater, and its treatment has become the main bottleneck restricting the sustainable development of novel coal chemical industry. Biological treatment is considered as an economical, effective and environmentally friendly technology for CCW treatment. However, conventional biological process is difficult to achieve the efficient removal of refractory organics because of CCW with the characteristics of composition complexity and high toxicity. Therefore, seeking the novel enhancement strategy appears to be a favorable solution for enhancing biological treatment efficiency of CCW. This review focuses on presenting a comprehensive picture about the exogenous enhancement strategies for CCW biological treatment. The performance and potential application of exogenous enhancement strategies, including co-metabolic substrate enhancement, biofilm filler enhancement, adsorption material enhancement and conductive mediator enhancement, were expounded. Meanwhile, the enhancing mechanisms of different strategies were comprehensively discussed from a biological perspective. Furthermore, the prospects of enhancement strategies based on the engineering performance, economic cost and environmental impact (3E) evaluation were introduced. And novel enhancement strategy based on "low carbon emissions", "resource recycling" and "water environment security" in the context of carbon neutrality was proposed. Taken together, this review provides technical reference and new direction to facilitate the regulation and optimization of typical industrial wastewater biological treatment.
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Affiliation(s)
- Weiwei Ma
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, China
| | - Xiaoqi Zhang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, China
| | - Hongjun Han
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Xueqing Shi
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, China.
| | - Qiaoping Kong
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, China
| | - Tong Yu
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, China
| | - Fei Zhao
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, China
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Vaidya SS, Patel AB, Jain K, Amin S, Madamwar D. Characterizing the bacterial consortium ASDF capable of catabolic degradation of fluoranthene and other mono- and poly-aromatic hydrocarbons. 3 Biotech 2020; 10:491. [PMID: 33134009 DOI: 10.1007/s13205-020-02478-w] [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: 06/02/2020] [Accepted: 10/12/2020] [Indexed: 10/23/2022] Open
Abstract
In this study, a bacterial consortium ASDF was developed, capable of degrading fluoranthene (a non-alternant poly-aromatic hydrocarbon). It comprised of three bacterial strains: Pseudomonas sp. ASDF1, Burkholderia sp. ASDF2 and Mycobacterium sp. ASDF3 capable of degrading 100 mg/L of fluoranthene under experimentally defined and optimum conditions (37 °C, pH 7.0, 150 rpm) within 7 days. Consortium had metabolized fluoranthene as sole source of carbon and energy with maximum degradation rate of 0.52 mg/L/h and growth rate of 0.054/h. Fluoranthene degradation is an aerobic process, therefore with increasing the gyratory shaking from 50 to 150 rpm, degradation was concurrently enhanced by 7.1-fold. The synthetic surfactants SDS and CTAB had antagonistic effect on fluoranthene degradation (decreased up to 2.8-fold). The proficiency of consortium was assessed for its inherent ability to degrade seven other hydrocarbons both individually as well as in mixture. The degradation profile was studied using HPLC and the detection of two degraded intermediates (salicylic acid and derivatives of phthalic acid) suggested that fluoranthene degradation might have occurred via ortho- and meta-cleavage pathways. The competency of consortium was further validated through simulated microcosm studies, which showed 96% degradation of fluoranthene in soil ecosystem under the ambient conditions. Hence, the study suggested that the consortium ASDF has an inherent potential for its wide applicability in bioremediation of hydrocarbon-contaminated sites.
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Affiliation(s)
- Sagar S Vaidya
- Post Graduate Department of Biosciences, UGC Centre of Advanced Study, Satellite Campus, Vadtal Road, Sardar Patel University, Bakrol, Anand, Gujarat 388 315 India
| | - Avani Bharatkumar Patel
- Post Graduate Department of Biosciences, UGC Centre of Advanced Study, Satellite Campus, Vadtal Road, Sardar Patel University, Bakrol, Anand, Gujarat 388 315 India
| | - Kunal Jain
- Post Graduate Department of Biosciences, UGC Centre of Advanced Study, Satellite Campus, Vadtal Road, Sardar Patel University, Bakrol, Anand, Gujarat 388 315 India
| | - Seema Amin
- P. D. Patel Institute of Applied Sciences, Charotar University of Science and Technology, Charusat Campus, Changa, Anand, Gujarat 388 421 India
| | - Datta Madamwar
- Post Graduate Department of Biosciences, UGC Centre of Advanced Study, Satellite Campus, Vadtal Road, Sardar Patel University, Bakrol, Anand, Gujarat 388 315 India.,P. D. Patel Institute of Applied Sciences, Charotar University of Science and Technology, Charusat Campus, Changa, Anand, Gujarat 388 421 India
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Sangkharak K, Choonut A, Rakkan T, Prasertsan P. The Degradation of Phenanthrene, Pyrene, and Fluoranthene and Its Conversion into Medium-Chain-Length Polyhydroxyalkanoate by Novel Polycyclic Aromatic Hydrocarbon-Degrading Bacteria. Curr Microbiol 2020; 77:897-909. [PMID: 31960091 DOI: 10.1007/s00284-020-01883-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 01/10/2020] [Indexed: 11/25/2022]
Abstract
Screening of high-efficient polycyclic aromatic hydrocarbon (PAH)-degrading bacteria is important due to environmental contamination by PAHs. In this study, sediment contaminated with phenanthrene (Phe), pyrene (Pyr), and fluoranthene (Fluo) was used as a source of bacteria. The ability of these isolated bacteria to convert PAHs into valuable products was determined. Based on a primary screening, 20 bacterial isolates were obtained; however, only three strains showed a good PAH-degrading ability, and were identified as Pseudomonas aeruginosa, Pseudomonas sp., and Ralstonia sp. PAH-degrading genes were detected in all isolates. Notably, all selected strains could degrade PAHs using the ortho or meta cleavage pathways due to the presence of catechol dioxygenase genes. The ability of isolated strains to convert PAHs into polyhydroxyalkanoate (PHA) was also evaluated in both single and mixed cultures. Single cultures of P. aeruginosa PAH-P02 showed 100% degradation of PAHs, with the highest biomass (1.27 ± 0.02 g l-1) and PHA content (38.20 ± 1.92% dry cell weight). However, degradative ability and PHA production were decreased when mixtures of PAHs were used. This study showed that P. aeruginosa, Pseudomonas sp., and Ralstonia sp. were able to degrade PAHs and convert them into medium-chain-length (mcl)-PHA. A high content of 3-hydroxydecanoate (3HD, C10) was observed in this study. The formation of mcl-PHA with high 3HD content from Pyr and Fluo, and the assessment of mixed cultures converting PAHs to mcl-PHA, were novel contributions.
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Affiliation(s)
- Kanokphorn Sangkharak
- Department of Chemistry, Faculty of Science, Thaksin University, Phatthalung, 93210, Thailand.
| | - Aophat Choonut
- Ph.D. Program in Biotechnology, Department of Biology, Faculty of Science, Thaksin University, Phatthalung, 93210, Thailand
| | - Thanaphorn Rakkan
- Ph.D. Program in Biotechnology, Department of Biology, Faculty of Science, Thaksin University, Phatthalung, 93210, Thailand
| | - Poonsuk Prasertsan
- Research and Development Office, Prince of Songkla University, Songkhla, 90112, Thailand
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Sivaram AK, Logeshwaran P, Lockington R, Naidu R, Megharaj M. Low molecular weight organic acids enhance the high molecular weight polycyclic aromatic hydrocarbons degradation by bacteria. CHEMOSPHERE 2019; 222:132-140. [PMID: 30703652 DOI: 10.1016/j.chemosphere.2019.01.110] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Revised: 01/16/2019] [Accepted: 01/21/2019] [Indexed: 06/09/2023]
Abstract
The biodegradation potential of three bacterial cultures isolated from the rhizosphere of maize (Zea mays) and Sudan grass (Sorghum sudanense) grown in PAHs contaminated soils to degrade benzo[a]pyrene (BaP) and pyrene (PYR) was assessed. Of the three bacterial cultures isolated, two belonged to Gram-positive bacteria of phylum Actinobacteria namely Arthrobacter sp. MAL3 and Microbacterium sp. MAL2. The Gram-negative bacterial culture was Stenotrophomonas sp. MAL1, from the phylum Proteobacteria. The cultures were grown in the presence of BaP and PYR as sole carbon sources and with the addition of low molecular weight organic acids (LMWOAs) mixture. After 10-14 days of exposure, all the bacterial isolates exhibited a complete degradation of PYR with the addition of LMWOAs mixture, whereas only 38.7% of BaP was degraded by Stenotrophomonas sp. MAL1 with the addition of LMWOAs mixture. In addition, enhanced PAHs biodegradation by bacterial culture was observed when the PAHs present as mixture (BaP + PYR) with the addition of LMWOAs. Dioxygenase genes were detected in Stenotrophomonas sp. MAL1 (phnAC), and Arthrobacter sp. MAL3 (nidA and PAH-RHDα). Therefore, this study provides new insights on the influence of LMWOAs in enhancing the degradation of high molecular weight (HMW) PAHs in soil by rhizosphere bacterial cultures.
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Affiliation(s)
- Anithadevi Kenday Sivaram
- Global Centre for Environmental Remediation, Faculty of Science, The University of Newcastle (UoN), University Drive, Callaghan, NSW, 2308, Australia; Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia, Mawson Lakes, SA, 5095, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environments, ATC Building, The University of Newcastle, University Drive, Callaghan, NSW, 2308, Australia
| | - Panneerselvan Logeshwaran
- Global Centre for Environmental Remediation, Faculty of Science, The University of Newcastle (UoN), University Drive, Callaghan, NSW, 2308, Australia; Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia, Mawson Lakes, SA, 5095, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environments, ATC Building, The University of Newcastle, University Drive, Callaghan, NSW, 2308, Australia
| | - Robin Lockington
- Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia, Mawson Lakes, SA, 5095, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environments, ATC Building, The University of Newcastle, University Drive, Callaghan, NSW, 2308, Australia
| | - Ravi Naidu
- Global Centre for Environmental Remediation, Faculty of Science, The University of Newcastle (UoN), University Drive, Callaghan, NSW, 2308, Australia; Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia, Mawson Lakes, SA, 5095, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environments, ATC Building, The University of Newcastle, University Drive, Callaghan, NSW, 2308, Australia
| | - Mallavarapu Megharaj
- Global Centre for Environmental Remediation, Faculty of Science, The University of Newcastle (UoN), University Drive, Callaghan, NSW, 2308, Australia; Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia, Mawson Lakes, SA, 5095, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environments, ATC Building, The University of Newcastle, University Drive, Callaghan, NSW, 2308, Australia.
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Subashchandrabose SR, Venkateswarlu K, Naidu R, Megharaj M. Biodegradation of high-molecular weight PAHs by Rhodococcus wratislaviensis strain 9: Overexpression of amidohydrolase induced by pyrene and BaP. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 651:813-821. [PMID: 30253363 DOI: 10.1016/j.scitotenv.2018.09.192] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 09/14/2018] [Accepted: 09/15/2018] [Indexed: 06/08/2023]
Abstract
A Gram-positive bacterium, Rhodococcus wratislaviensis strain 9, completely degraded 280 μM of phenanthrene, 40% of 50 μM pyrene or 28% of 40 μM benzo[a]pyrene (BaP), each supplemented in M9 medium, within 7 days. PCR screening with gene-specific primers indicated that the strain 9 harbors genes which code for 2,3-dihydroxybiphenyl 1,2-dioxygenase (bphC), 4-nitrophenol 2-monooxygenase component B (npcB) as well as oxygenase component (nphA1), 4-hydroxybenzoate 3-monooxygenase (phbH), extradiol dioxygenase (edo), and naphthalene dioxygenase (ndo), all of which are largely implicated in biodegradation of several aromatic hydrocarbons. An orthogonal design experiment revealed that BaP biodegradation was greatly enhanced by surfactants such as Tween 80, Triton X-100 and linoleic acid, suggesting that bioavailability is the major limiting factor in bacterial metabolism of BaP. Both pyrene and BaP induced the overexpression of amidohydrolase, a metallo-dependent hydrolase, possibly involved in their biodegradation by strain 9. The up-regulation of amidohydrolase gene induced by BaP, in particular, was also confirmed by semi-quantitative RT-PCR. Catechol 2,3-dioxygenase and the large subunit of ndo, but not amidohydrolase, accumulated when the strain 9 was grown on phenanthrene. To our knowledge, this is the first report on overexpression of amidohydrolase and its possible implication in bacterial degradation of high-molecular weight PAHs.
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Affiliation(s)
- Suresh R Subashchandrabose
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, Callaghan NSW 2308, Australia, and CRC CARE, Newcastle University LPO, PO Box 18, Callaghan, NSW 2308, Australia
| | - Kadiyala Venkateswarlu
- Formerly Department of Microbiology, Sri Krishnadevaraya University, Anantapur 515055, India
| | - Ravi Naidu
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, Callaghan NSW 2308, Australia, and CRC CARE, Newcastle University LPO, PO Box 18, Callaghan, NSW 2308, Australia
| | - Mallavarapu Megharaj
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, Callaghan NSW 2308, Australia, and CRC CARE, Newcastle University LPO, PO Box 18, Callaghan, NSW 2308, Australia.
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7
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Yuan K, Chen B, Qing Q, Zou S, Wang X, Luan T. Polycyclic aromatic hydrocarbons (PAHs) enrich their degrading genera and genes in human-impacted aquatic environments. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 230:936-944. [PMID: 28743092 DOI: 10.1016/j.envpol.2017.07.059] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 07/18/2017] [Accepted: 07/18/2017] [Indexed: 06/07/2023]
Abstract
Bacterial degradation is an important clearance pathway for organic contaminants from highly human-impacted environments. However, it is not fully understood how organic contaminants are selected for degradation by bacteria and genes in aquatic environments. In this study, PAH degrading bacterial genera and PAH-degradation-related genes (PAHDGs) in sediments collected from the Pearl River (PR), the Pearl River Estuary (PRE) and the South China Sea (SCS), among which there were distinct differences in anthropogenic impact, were analyzed using metagenomic approaches. The diversity and abundance of PAH degrading genera and PAHDGs in the PR were substantially higher than those in the PRE and the SCS and were significantly correlated with the total PAH concentration. PAHDGs involved with the three key processes of PAH degradation (ring cleavage, side chain and central aromatic processes) were significantly correlated with each other in the sediments. In particular, plasmid-related PAHDGs were abundant in the PR sediments, indicating plasmid-mediated horizontal transfer of these genes between bacteria or the overgrowth of the bacteria containing these plasmids under the stresses of PAHs. Our results suggest that PAH degrading bacteria and genes were rich in PAH-polluted aquatic environments, which could facilitate the removal of PAHs by bacteria.
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Affiliation(s)
- Ke Yuan
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Science, Sun Yat-Sen University, Guangzhou 510275, China; South China Sea Resource Exploitation and Protection Collaborative Innovation Center, School of Marine Sciences, Sun Yat-Sen University, Guangzhou 510275, China
| | - Baowei Chen
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Science, Sun Yat-Sen University, Guangzhou 510275, China; South China Sea Resource Exploitation and Protection Collaborative Innovation Center, School of Marine Sciences, Sun Yat-Sen University, Guangzhou 510275, China
| | - Qing Qing
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Science, Sun Yat-Sen University, Guangzhou 510275, China; South China Sea Resource Exploitation and Protection Collaborative Innovation Center, School of Marine Sciences, Sun Yat-Sen University, Guangzhou 510275, China
| | - Shichun Zou
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Science, Sun Yat-Sen University, Guangzhou 510275, China; South China Sea Resource Exploitation and Protection Collaborative Innovation Center, School of Marine Sciences, Sun Yat-Sen University, Guangzhou 510275, China
| | - Xiaowei Wang
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Science, Sun Yat-Sen University, Guangzhou 510275, China; South China Sea Resource Exploitation and Protection Collaborative Innovation Center, School of Marine Sciences, Sun Yat-Sen University, Guangzhou 510275, China
| | - Tiangang Luan
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Science, Sun Yat-Sen University, Guangzhou 510275, China; South China Sea Resource Exploitation and Protection Collaborative Innovation Center, School of Marine Sciences, Sun Yat-Sen University, Guangzhou 510275, China; School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, China.
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Ping L, Guo Q, Chen X, Yuan X, Zhang C, Zhao H. Biodegradation of pyrene and benzo[a]pyrene in the liquid matrix and soil by a newly identified Raoultella planticola strain. 3 Biotech 2017; 7:56. [PMID: 28444597 DOI: 10.1007/s13205-017-0704-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 03/21/2017] [Indexed: 11/28/2022] Open
Abstract
In the current study, the PL7 strain was isolated from soil and identified as Raoultella planticola based on its physiological characteristics and 16S rDNA sequence. By the 10th day, the PL7 strain degraded 52.0% of the pyrene (PYR) content and 50.8% of the benzo[a]pyrene (BaP) content in 20 mg L-1 PYR and 10 mg L-1 BaP in the liquid matrix. The half-life of PYR and BaP by PL7 degradation was 8.59 and 9.46 days, respectively. At pH 8.0, the degradation rates of PYR and BaP by PL7 were significantly higher at 30 °C than at 20 and 40 °C. The degradation ability of PL7 differed in red soil, paddy soil and fluvo-aquic soil; red soil produced the fastest degradation rates. The half-life of PYR and BaP by PL7 degradation in red soil was 21.7 and 11.9 days, respectively; however, without PL7 the half-life of PYR in red soil was 91.2 days. This study demonstrated the significant potential of the PL7 strain for bioremediation applications in the liquid matrix and soil contaminated by PAHs.
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Affiliation(s)
- Lifeng Ping
- Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province, Zhejiang University of Science and Technology, Hangzhou, 310023, China.
- Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China.
| | - Qian Guo
- Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Xiaoyang Chen
- Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Xiaoli Yuan
- Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province, Zhejiang University of Science and Technology, Hangzhou, 310023, China
| | - Chunrong Zhang
- Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Hua Zhao
- Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
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Bezza FA, Chirwa EMN. Biosurfactant-Assisted Bioremediation of Polycyclic Aromatic Hydrocarbons (PAHs) in Liquid Culture System and Substrate Interactions. Polycycl Aromat Compd 2016. [DOI: 10.1080/10406638.2015.1129973] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Fisseha Andualem Bezza
- Water Utilisation and Environmental Engineering Division, Department of Chemical Engineering, University of Pretoria, Pretoria, Republic of South Africa
| | - Evans M. Nkhalambayausi Chirwa
- Water Utilisation and Environmental Engineering Division, Department of Chemical Engineering, University of Pretoria, Pretoria, Republic of South Africa
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10
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Biodegradation of Mixed PAHs by PAH-Degrading Endophytic Bacteria. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:ijerph13080805. [PMID: 27517944 PMCID: PMC4997491 DOI: 10.3390/ijerph13080805] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 07/26/2016] [Accepted: 08/03/2016] [Indexed: 11/16/2022]
Abstract
Endophytic bacteria can promote plant growth, induce plant defence mechanisms, and increase plant resistance to organic contaminants. The aims of the present study were to isolate highly PAH-degrading endophytic bacteria from plants growing at PAH-contaminated sites and to evaluate the capabilities of these bacteria to degrade polycyclic aromatic hydrocarbons (PAHs) in vitro, which will be beneficial for re-colonizing target plants and reducing plant PAH residues through the inoculation of plants with endophytic bacteria. Two endophytic bacterial strains P1 (Stenotrophomonas sp.) and P3 (Pseudomonas sp.), which degraded more than 90% of phenanthrene (PHE) within 7 days, were isolated from Conyza canadensis and Trifolium pretense L., respectively. Both strains could use naphthalene (NAP), PHE, fluorene (FLR), pyrene (PYR), and benzo(a)pyrene (B(a)P) as the sole sources of carbon and energy. Moreover, these bacteria reduced the contamination of mixed PAHs at high levels after inoculation for 7 days; strain P1 degraded 98.0% NAP, 83.1% FLR, 87.8% PHE, 14.4% PYR, and 1.6% B(a)P, and strain P3 degraded 95.3% NAP, 87.9% FLR, 90.4% PHE, 6.9% PYR, and negligible B(a)P. Notably, the biodegradation of PAHs could be promoted through additional carbon and nitrogen nutrients; therein, beef extract was suggested as the optimal co-substrate for the degradation of PAHs by these two strains (99.1% PHE was degraded within 7 days). Compared with strain P1, strain P3 has more potential for the use in the removal of PAHs from plant tissues. These results provide a novel perspective in the reduction of plant PAH residues in PAH-contaminated sites through inoculating plants with highly PAH-degrading endophytic bacteria.
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Potential of Endophytic Bacterium Paenibacillus sp. PHE-3 Isolated from Plantago asiatica L. for Reduction of PAH Contamination in Plant Tissues. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:ijerph13070633. [PMID: 27347988 PMCID: PMC4962174 DOI: 10.3390/ijerph13070633] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 06/01/2016] [Accepted: 06/11/2016] [Indexed: 11/17/2022]
Abstract
Endophytes are ubiquitous in plants, and they may have a natural capacity to biodegrade polycyclic aromatic hydrocarbons (PAHs). In our study, a phenanthrene-degrading endophytic Paenibacillus sp. PHE-3 was isolated from P. asiatica L. grown in a PAH-contaminated site. The effects of environmental variables on phenanthrene biodegradation by strain PHE-3 were studied, and the ability of strain PHE-3 to use high molecular weight PAH (HMW-PAH) as a sole carbon source was also evaluated. Our results indicated that pH value of 4.0–8.0, temperature of 30 °C–42 °C, initial phenanthrene concentration less than 100 mg·L−1, and some additional nutrients are favorable for the biodegradation of phenanthrene by strain PHE-3. The maximum biodegradation efficiency of phenanthrene was achieved at 99.9% after 84 h cultivation with additional glutamate. Moreover, the phenanthrene biodegradation by strain PHE-3 was positively correlated with the catechol 2,3-dioxygenase activity (ρ = 0.981, p < 0.05), suggesting that strain PHE-3 had the capability of degrading HMW-PAHs. In the presence of other 2-, 3-ringed PAHs, strain PHE-3 effectively degraded HMW-PAHs through co-metabolism. The results of this study are beneficial in that the re-colonization potential and PAH degradation performance of endophytic Paenibacillus sp. PHE-3 may be applied towards reducing PAH contamination in plants.
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Xu X, Chen X, Su P, Fang F, Hu B. Biodegradation potential of polycyclic aromatic hydrocarbons by bacteria strains enriched from Yangtze River sediments. ENVIRONMENTAL TECHNOLOGY 2015; 37:513-520. [PMID: 26227671 DOI: 10.1080/09593330.2015.1074289] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Microbial degradation is an effective method for the removal of polycyclic aromatic hydrocarbons (PAHs) compounds from polluted sediments. Surface sediments collected from Yangtze River in the downtown area of Chongqing were found to contain PAH concentrations to various different degrees. Two bacteria strains (termed PJ1 and PJ2) isolated from the sediment samples could use phenanthrene (Phe) and fluoranthene (Flu) as carbon sources for growth thereby degrading these two PAH compounds. Using 16S rDNA gene sequencing, the isolates were identified as Sphingomonas sp. and Klebsiella sp., respectively. Biodegradation assays showed that the PJ1 presented an efficient degradation capability compared to PJ2 in cultures with the initial Phe and Flu concentrations ranging from 20 to 200 mg/L. The highest rates of Phe and Flu biodegradation by PJ1 reached 74.32% and 58.18% after incubation for 15 and 30 days, respectively. This is the first report on the biodegradation potential of the bacterial from surface sediments of an industrial area upstream of the Gorge Reservoir.
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Affiliation(s)
- Xiaoyi Xu
- a Key Laboratory of Three Gorges Reservoir Region's Eco-environment, Ministry of Education , Chongqing University , Chongqing , People's Republic of China
- b National Center for International Research of Low-carbon and Green Buildings , Chongqing University , Chongqing , People's Republic of China
- c College of Urban Construction and Environmental Engineering , Chongqing University , 174#, Shazheng Street, Shapingba District, Chongqing 400045 , People's Republic of China
| | - Xi Chen
- a Key Laboratory of Three Gorges Reservoir Region's Eco-environment, Ministry of Education , Chongqing University , Chongqing , People's Republic of China
- b National Center for International Research of Low-carbon and Green Buildings , Chongqing University , Chongqing , People's Republic of China
| | - Pan Su
- a Key Laboratory of Three Gorges Reservoir Region's Eco-environment, Ministry of Education , Chongqing University , Chongqing , People's Republic of China
- b National Center for International Research of Low-carbon and Green Buildings , Chongqing University , Chongqing , People's Republic of China
| | - Fang Fang
- a Key Laboratory of Three Gorges Reservoir Region's Eco-environment, Ministry of Education , Chongqing University , Chongqing , People's Republic of China
- b National Center for International Research of Low-carbon and Green Buildings , Chongqing University , Chongqing , People's Republic of China
| | - Bibo Hu
- a Key Laboratory of Three Gorges Reservoir Region's Eco-environment, Ministry of Education , Chongqing University , Chongqing , People's Republic of China
- b National Center for International Research of Low-carbon and Green Buildings , Chongqing University , Chongqing , People's Republic of China
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Ping L, Zhang C, Zhang C, Zhu Y, He H, Wu M, Tang T, Li Z, Zhao H. Isolation and characterization of pyrene and benzo[a]pyrene-degrading Klebsiella pneumonia PL1 and its potential use in bioremediation. Appl Microbiol Biotechnol 2014; 98:3819-28. [PMID: 24389667 DOI: 10.1007/s00253-013-5469-6] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 12/10/2013] [Accepted: 12/11/2013] [Indexed: 12/01/2022]
Abstract
Polycyclic aromatic hydrocarbons (PAHs), which are hard to degrade, are the main pollutants in the environment. Degradation of PAHs in the environment is becoming more necessary and urgent. In the current study, strain PL1 with degradation capability of pyrene (PYR) and benzo[a]pyrene (BaP) was isolated from soil and identified as Klebsiella pneumoniae by morphological and physiological characteristics as well as 16S rDNA sequence. With the presence of 20 mg L⁻¹ PYR and 10 mg L⁻¹ BaP in solution, the strain PL1 could degrade 63.4 % of PYR and 55.8 % of BaP in 10 days, respectively. The order of biodegradation of strain PL1 was pH 7.0 > pH 8.0 > pH 10.0 > pH 6.0 > pH 5.0. Strain PL1 degradation ability varied in different soil. The half-life of PYR in soil was respectively 16.9, 24.9, and 88.9 days in paddy soil, red soil, and fluvo-aquic soil by PL1 degradation; however, the half-lives of BaP were respectively 9.5, 9.5, and 34.0 days in paddy soil, red soil, and fluvo-aquic soil by PL1 degradation. The results demonstrate that the degradation capability on PYR and BaP by PL1 in paddy soil was relatively good, and K. pneumoniae PL1 was the new degradation bacterium of PYR and BaP. K. pneumoniae PL1 has potential application in PAH bioremediation.
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Affiliation(s)
- Lifeng Ping
- Institute of Quality and Standard for Agro-products, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China,
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Patel V, Patel J, Madamwar D. Biodegradation of phenanthrene in bioaugmented microcosm by consortium ASP developed from coastal sediment of Alang-Sosiya ship breaking yard. MARINE POLLUTION BULLETIN 2013; 74:199-207. [PMID: 23906474 DOI: 10.1016/j.marpolbul.2013.07.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Revised: 06/11/2013] [Accepted: 07/01/2013] [Indexed: 06/02/2023]
Abstract
A phenanthrene-degrading bacterial consortium (ASP) was developed using sediment from the Alang-Sosiya shipbreaking yard at Gujarat, India. 16S rRNA gene-based molecular analyses revealed that the bacterial consortium consisted of six bacterial strains: Bacillus sp. ASP1, Pseudomonas sp. ASP2, Stenotrophomonas maltophilia strain ASP3, Staphylococcus sp. ASP4, Geobacillus sp. ASP5 and Alcaligenes sp. ASP6. The consortium was able to degrade 300 ppm of phenanthrene and 1000 ppm of naphthalene within 120 h and 48 h, respectively. Tween 80 showed a positive effect on phenanthrene degradation. The consortium was able to consume maximum phenanthrene at the rate of 46 mg/h/l and degrade phenanthrene in the presence of other petroleum hydrocarbons. A microcosm study was conducted to test the consortium's bioremediation potential. Phenanthrene degradation increased from 61% to 94% in sediment bioaugmented with the consortium. Simultaneously, bacterial counts and dehydrogenase activities also increased in the bioaugmented sediment. These results suggest that microbial consortium bioaugmentation may be a promising technology for bioremediation.
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Affiliation(s)
- Vilas Patel
- BRD School of Biosciences, Sardar Patel Maidan, Vadtal Road, Satellite complex, Post Box No. 39, Sardar Patel University, Vallabh Vidyanagar 388 120, Gujarat, India.
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15
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Nzila A. Update on the cometabolism of organic pollutants by bacteria. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2013; 178:474-82. [PMID: 23570949 DOI: 10.1016/j.envpol.2013.03.042] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Revised: 03/17/2013] [Accepted: 03/19/2013] [Indexed: 05/20/2023]
Abstract
Each year, tons of various types of molecules pollute our environment, and their elimination is one of the major challenges human kind is facing. Among the strategies to eliminate these pollutants is their biodegradation by microorganisms. However, many pollutants cannot be used efficiently as growth substrates by microorganisms. Biodegradation of such molecules by cometabolism has been reported, which is the ability of a microorganism to biodegrade a pollutant without using it as a growth-substrate (non-growth-substrate), while sustaining its own growth by assimilating a different substrate (growth-substrate). This approach has been used in the field of bioremediation, however, its potential has not been fully exploited yet. This review summarises the work carried out on the cometabolism of important recalcitrant pollutants, and presents strategies that can be used to improve ways of identifying microorganisms that can cometabolise such recalcitrant pollutants.
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Affiliation(s)
- Alexis Nzila
- King Fahd University of Petroleum and Minerals, Department of Biology, PO Box 468, Dhahran 31261, Saudi Arabia.
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Zhong Y, Luan T, Lin L, Liu H, Tam NFY. Production of metabolites in the biodegradation of phenanthrene, fluoranthene and pyrene by the mixed culture of Mycobacterium sp. and Sphingomonas sp. BIORESOURCE TECHNOLOGY 2011; 102:2965-2972. [PMID: 21036605 DOI: 10.1016/j.biortech.2010.09.113] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2010] [Revised: 09/27/2010] [Accepted: 09/28/2010] [Indexed: 05/30/2023]
Abstract
The effects of the mixed culture of Mycobacterium sp. strain A1-PYR and Sphingomonas sp. strain PheB4 on the degradation characteristics of single polycyclic aromatic hydrocarbon were investigated. In the mixed bacterial culture, phenanthrene, fluoranthene and pyrene were degraded by 100% at Day 3, 71.2% and 50% at Day 7, respectively. Compared to their respective pure cultures, the degradation of phenanthrene and fluoranthene decreased, but that of pyrene increased significantly. Based on GC-MS analysis, eight and six new metabolites were produced from the biodegradation of phenanthrene and fluoranthene, respectively, while only two new metabolites were formed from pyrene. To our knowledge, this is the first report that the mixed bacterial culture could increase the diversity of metabolites from PAH, but the diverse metabolite pattern was not necessarily beneficial to the degradation of the recalcitrant PAH. The enhancement on pyrene degradation was possibly attributed to the rapid growth of strain PheB4.
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Affiliation(s)
- Yin Zhong
- MOE Key Laboratory of Aquatic Product Safety, School of Life Sciences, Sun Yat-sen University, Guangzhou, People's Republic of China
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