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Alhajeri NS, Tawfik A, Nasr M, Osman AI. Artificial intelligence-enabled optimization of Fe/Zn@biochar photocatalyst for 2,6-dichlorophenol removal from petrochemical wastewater: A techno-economic perspective. CHEMOSPHERE 2024; 352:141476. [PMID: 38382716 DOI: 10.1016/j.chemosphere.2024.141476] [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: 11/28/2023] [Revised: 01/17/2024] [Accepted: 02/14/2024] [Indexed: 02/23/2024]
Abstract
While numerous studies have addressed the photocatalytic degradation of 2,6-dichlorophenol (2,6-DCP) in wastewater, an existing research gap pertains to operational factors' optimization by non-linear prediction models to ensure a cost-effective and sustainable process. Herein, we focus on optimizing the photocatalytic degradation of 2,6-DCP using artificial intelligence modeling, aiming at minimizing initial capital outlay and ongoing operational expenses. Hence, Fe/Zn@biochar, a novel material, was synthesized, characterized, and applied to harness the dual capabilities of 2,6-DCP adsorption and degradation. Fe/Zn@biochar exhibited an adsorption energy of -21.858 kJ/mol, effectively capturing the 2,6-DCP molecules. This catalyst accumulated photo-excited electrons, which, upon interaction with adsorbed oxygen and/or dissolved oxygen generated •O2-. The •OH radicals could also be produced from h+ in the Fe/Zn@biochar valence band, cleaving the C-Cl bonds to Cl- ions, dechlorinated byproducts, and phenols. An artificial neural network (ANN) model, with a 4-10-1 topology, "trainlm" training function, and feed-forward back-propagation algorithm, was developed to predict the 2,6-DCP removal efficiency. The ANN prediction accuracy was expressed as R2 = 0.967 and mean squared error = 5.56e-22. The ANN-based optimized condition depicted that over 90% of 2,6-DCP could be eliminated under C0 = 130 mg/L, pH = 2.74, and catalyst dosage = 168 mg/L within ∼4 h. This optimum condition corresponded to a total cost of $7.70/m3, which was cheaper than the price estimated from the unoptimized photocatalytic system by 16%. Hence, the proposed ANN could be employed to enhance the 2,6-DCP photocatalytic degradation process with reduced operational expenses, providing practical and cost-effective solutions for petrochemical wastewater treatment.
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Affiliation(s)
- Nawaf S Alhajeri
- Department of Environmental Sciences, College of Life Sciences, Kuwait University, P.O. Box 5969, Safat, 13060, Kuwait
| | - Ahmed Tawfik
- Department of Environmental Sciences, College of Life Sciences, Kuwait University, P.O. Box 5969, Safat, 13060, Kuwait.
| | - Mahmoud Nasr
- Sanitary Engineering Department, Faculty of Engineering, Alexandria University, Alexandria, 21544, Egypt
| | - Ahmed I Osman
- School of Chemistry and Chemical Engineering, Queen's University Belfast, United Kingdom.
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Ibrahiem H, Ismail GSM, Migahid MM, Ghazy MA, Nasr M. Dual phytoremediation and biochar production by Eichhornia crassipes in hydroponic system receiving different 1,4-dioxane dosages. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2023; 26:546-556. [PMID: 37667465 DOI: 10.1080/15226514.2023.2253915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
This study focuses on applying phytoremediation as a low-effective and simple process to treat wastewater laden with 1,4 dioxane (DIOX). A floating macrophyte (Eichhornia crassipes) was cultivated under hydroponic conditions (relative humidity 50-67%, photoperiod cycle 18:6 h light/dark, and 28-33 °C) and subjected to different DIOX loads between 0.0 (control) and 11.5 mg/g fresh mass (FM). The aquatic plant achieved DIOX and chemical oxygen demand (COD) removal efficiencies of 76-96% and 67-94%, respectively, within 15 days. E. crassipes could tolerate elevated DIOX-associated stresses until a dose of 8.2 mg DIOX/g, which highly influenced the oxidative defense system. Malondialdehyde (MDA) content, hydrogen peroxide (H2O2), and total phenolic compounds (TPC) increased by 7.3, 8.4, and 4.5-times, respectively, in response to operating the phytoremediation unit at a DIOX load of 11.5 mg/g. The associated succulent value, proteins, chlorophyll-a, chlorophyll-b, and pigments dropped by 39.6%, 45.8%, 51.5%, 80.8%, and 55.5%, respectively. The suggested removal mechanism of DIOX by E. crassipes could be uptake followed by phytovolatilization, whereas direct photodegradation from sunlight contributed to about 19.36% of the total DIOX removal efficiencies. Recycling the exhausted E. crassipes for biochar production was a cost-efficient strategy, making the payback period of the phytoremediation project equals to 6.96 yr.
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Affiliation(s)
- Hadeer Ibrahiem
- Biotechnology Program, Basic and Applied Science Institute, Egypt-Japan University of Science and Technology (E-JUST), Alexandria, Egypt
- Biological and Geological Sciences Department, Faculty of Education, Alexandria University, Alexandria, Egypt
| | - Ghada Saber M Ismail
- Botany and Microbiology Department, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Masarrat M Migahid
- Biological and Geological Sciences Department, Faculty of Education, Alexandria University, Alexandria, Egypt
| | - Mohamed A Ghazy
- Biotechnology Program, Basic and Applied Science Institute, Egypt-Japan University of Science and Technology (E-JUST), Alexandria, Egypt
- Biochemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt
| | - Mahmoud Nasr
- Environmental Engineering Department, Egypt-Japan University of Science and Technology (E-JUST), Alexandria, Egypt
- Sanitary Engineering Department, Faculty of Engineering, Alexandria University, Alexandria, Egypt
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Characterization of 1,4-dioxane degrading microbial community enriched from uncontaminated soil. Appl Microbiol Biotechnol 2023; 107:955-969. [PMID: 36625913 DOI: 10.1007/s00253-023-12363-0] [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: 11/01/2022] [Revised: 11/01/2022] [Accepted: 01/01/2023] [Indexed: 01/11/2023]
Abstract
1,4-Dioxane is a contaminant of emerging concern that has been commonly detected in groundwater. In this study, a stable and robust 1,4-dioxane degrading enrichment culture was obtained from uncontaminated soil. The enrichment was capable to metabolically degrade 1,4-dioxane at both high (100 mg L-1) and environmentally relevant concentrations (300 μg L-1), with a maximum specific 1,4-dioxane degradation rate (qmax) of 0.044 ± 0.001 mg dioxane h-1 mg protein-1, and 1,4-dioxane half-velocity constant (Ks) of 25 ± 1.6 mg L-1. The microbial community structure analysis suggested Pseudonocardia species, which utilize the dioxane monooxygenase for metabolic 1,4-dioxane biodegradation, were the main functional species for 1,4-dioxane degradation. The enrichment culture can adapt to both acidic (pH 5.5) and alkaline (pH 8) conditions and can recover degradation from low temperature (10°C) and anoxic (DO < 0.5 mg L-1) conditions. 1,4-Dioxane degradation of the enrichment culture was reversibly inhibited by TCE with concentrations higher than 5 mg L-1 and was completely inhibited by the presence of 1,1-DCE as low as 1 mg L-1. Collectively, these results demonstrated indigenous stable and robust 1,4-dioxane degrading enrichment culture can be obtained from uncontaminated sources and can be a potential candidate for 1,4-dioxane bioaugmentation at environmentally relevant conditions. KEY POINTS: •1,4-Dioxane degrading enrichment was obtained from uncontaminated soil. • The enrichment culture could degrade 1,4-dioxane to below 10 μg L-1. •Low Ks and low cell yield of the enrichment benefit its application in bioremediation.
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Kikani M, Satasiya GV, Sahoo TP, Kumar PS, Kumar MA. Remedial strategies for abating 1,4-dioxane pollution-special emphasis on diverse biotechnological interventions. ENVIRONMENTAL RESEARCH 2022; 214:113939. [PMID: 35921903 DOI: 10.1016/j.envres.2022.113939] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 07/15/2022] [Accepted: 07/18/2022] [Indexed: 06/15/2023]
Abstract
1,4-dioxane is a heterocyclic ether used as a polar industrial solvent and are released as waste discharges. 1,4-dioxane deteriorates health and quality, thereby attracts concern by the environment technologists. The need of attaining sustainable development goals have resulted in search of an eco-friendly and technically viable treatment strategy. This extensive review is aimed to emphasis on the (a) characteristics of 1,4-dioxane and their occurrence in the environment as well as their toxicity, (b) remedial strategies, such as physico-chemical treatment and advanced oxidation techniques. Special reference to bioremediation that involves diverse microbial strains and their mechanism are highlighted in this review. The role of macronutrients, stimulants and other abiotic cofactors in the biodegradation of 1,4-dioxane is discussed lucidly. We have critically discussed the inducible enzymes, enzyme-based remediation, distinct instrumental method of analyses to know the fate of intermediates produced from 1,4-dioxane biotransformation. This comprehensive survey also tries to put forth the different toxicity assessment tools used in evaluating the extent of detoxification of 1,4-dioxane achieved through biotransforming mechanism. Conclusively, the challenges, opportunities, techno-economic feasibility and future prospects of implementing 1,4-dioxane through biotechnological interventions are also discussed.
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Affiliation(s)
- Mansi Kikani
- Analytical and Environmental Science Division & Centralized Instrument Facility, CSIR-Central Salt & Marine Chemicals Research Institute, Bhavnagar-364 002 (Gujarat), India
| | - Gopi Vijaybhai Satasiya
- Analytical and Environmental Science Division & Centralized Instrument Facility, CSIR-Central Salt & Marine Chemicals Research Institute, Bhavnagar-364 002 (Gujarat), India
| | - Tarini Prasad Sahoo
- Analytical and Environmental Science Division & Centralized Instrument Facility, CSIR-Central Salt & Marine Chemicals Research Institute, Bhavnagar-364 002 (Gujarat), India; Academy of Scientific and Innovative Research, Ghaziabad-201 002 (Uttar Pradesh), India
| | - P Senthil Kumar
- Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Chennai-603 110 (Tamil Nadu), India; Centre of Excellence in Water Research (CEWAR), Sri Sivasubramaniya Nadar College of Engineering, Chennai-603 110 (Tamil Nadu), India
| | - Madhava Anil Kumar
- Analytical and Environmental Science Division & Centralized Instrument Facility, CSIR-Central Salt & Marine Chemicals Research Institute, Bhavnagar-364 002 (Gujarat), India; Academy of Scientific and Innovative Research, Ghaziabad-201 002 (Uttar Pradesh), India.
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Simmer R, Mathieu J, da Silva MLB, Lashmit P, Gopishetty S, Alvarez PJJ, Schnoor JL. Bioaugmenting the poplar rhizosphere to enhance treatment of 1,4-dioxane. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 744:140823. [PMID: 32721670 DOI: 10.1016/j.scitotenv.2020.140823] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 07/02/2020] [Accepted: 07/06/2020] [Indexed: 06/11/2023]
Abstract
1,4-Dioxane is a highly mobile and persistent groundwater pollutant that often forms large dilute plumes. Because of this, utilizing aggressive pump-and-treat and ex-situ technologies such as advanced oxidation can be prohibitively expensive. In this study, we bioaugmented the poplar rhizosphere with dioxane-degrading bacteria Mycobacterium dioxanotrophicus PH-06 or Pseudonocardia dioxanivorans CB1190 to enhance treatment of 1,4-dioxane in bench-scale experiments. All treatments tested removed 10 mg/L dioxane to near health advisory levels (<4 μg/L). However, PH-06-bioaugmented poplar significantly outperformed all other treatments, reaching <4 μg/L in only 13 days. Growth curve experiments confirmed that PH-06 could not utilize root extract as an auxiliary carbon source for growth. Despite this limitation, our findings suggest that PH-06 is a strong bioaugmentation candidate to enhance the treatment of dioxane by phytoremediation. In addition, we confirmed that CB1190 could utilize both 1,4-dioxane and root extract as substrates. Finally, we demonstrated the large-scale production of these two strains for use in the field. Overall, this study shows that combining phytoremediation and bioaugmentation is an attractive strategy to treat dioxane-contaminated groundwater to low risk-based concentrations (~1 μg/L).
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Affiliation(s)
- Reid Simmer
- Department of Civil and Environmental Engineering, College of Engineering, The University of Iowa, Iowa City, IA, USA.
| | - Jacques Mathieu
- Department of Civil and Environmental Engineering, College of Engineering, Rice University, Houston, TX, USA
| | - Marcio L B da Silva
- Department of Civil and Environmental Engineering, College of Engineering, Rice University, Houston, TX, USA
| | - Philip Lashmit
- Center for Biocatalysis and Bioprocessing, Office for the Vice President for Research and Economic Development, University of Iowa Research Park, The University of Iowa, Coralville, IA, USA
| | - Sridhar Gopishetty
- Center for Biocatalysis and Bioprocessing, Office for the Vice President for Research and Economic Development, University of Iowa Research Park, The University of Iowa, Coralville, IA, USA
| | - Pedro J J Alvarez
- Department of Civil and Environmental Engineering, College of Engineering, Rice University, Houston, TX, USA
| | - Jerald L Schnoor
- Department of Civil and Environmental Engineering, College of Engineering, The University of Iowa, Iowa City, IA, USA
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Ramalingam V, Cupples AM. Anaerobic 1,4-dioxane biodegradation and microbial community analysis in microcosms inoculated with soils or sediments and different electron acceptors. Appl Microbiol Biotechnol 2020; 104:4155-4170. [DOI: 10.1007/s00253-020-10512-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 02/17/2020] [Accepted: 02/28/2020] [Indexed: 11/29/2022]
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Anteneh YS, Franco CMM. Whole Cell Actinobacteria as Biocatalysts. Front Microbiol 2019; 10:77. [PMID: 30833932 PMCID: PMC6387938 DOI: 10.3389/fmicb.2019.00077] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2018] [Accepted: 01/15/2019] [Indexed: 12/25/2022] Open
Abstract
Production of fuels, therapeutic drugs, chemicals, and biomaterials using sustainable biological processes have received renewed attention due to increasing environmental concerns. Despite having high industrial output, most of the current chemical processes are associated with environmentally undesirable by-products which escalate the cost of downstream processing. Compared to chemical processes, whole cell biocatalysts offer several advantages including high selectivity, catalytic efficiency, milder operational conditions and low impact on the environment, making this approach the current choice for synthesis and manufacturing of different industrial products. In this review, we present the application of whole cell actinobacteria for the synthesis of biologically active compounds, biofuel production and conversion of harmful compounds to less toxic by-products. Actinobacteria alone are responsible for the production of nearly half of the documented biologically active metabolites and many enzymes; with the involvement of various species of whole cell actinobacteria such as Rhodococcus, Streptomyces, Nocardia and Corynebacterium for the production of useful industrial commodities.
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Affiliation(s)
- Yitayal Shiferaw Anteneh
- College of Medicine and Public Health, Medical Biotechnology, Flinders University, Bedford Park, SA, Australia
- Department of Medical Microbiology, College of Medicine, Addis Ababa University, Addis Ababa, Ethiopia
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8
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Barajas-Rodriguez FJ, Freedman DL. Aerobic biodegradation kinetics for 1,4-dioxane under metabolic and cometabolic conditions. JOURNAL OF HAZARDOUS MATERIALS 2018; 350:180-188. [PMID: 29477886 DOI: 10.1016/j.jhazmat.2018.02.030] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 01/22/2018] [Accepted: 02/15/2018] [Indexed: 06/08/2023]
Abstract
Biodegradation of 1,4-dioxane has been studied extensively, however, there is insufficient information on the kinetic characteristics of cometabolism by propanotrophs and a lack of systematic comparisons to metabolic biodegradation. To fill in these gaps, experiments were performed with suspended growth cultures to determine 16 Monod kinetic coefficients that describe metabolic consumption of 1,4-dioxane by Pseudonocardia dioxanivorans CB1190 and cometabolism by the propanotrophic mixed culture ENV487 and the propanotroph Rhodococcus ruber ENV425. Maximum specific growth rates were highest for ENV425, followed by ENV487 and CB1190. Half saturation constants for 1,4-dioxane for the propanotrophs were one-half to one-quarter those for CB1190. Propane was preferentially degraded over 1,4-dioxane, but the reverse did not occur. A kinetic model was used to simulate batch biodegradation of 1,4-dioxane. Propanotrophs decreased 1,4-dioxane from 1000 to 1 μg/L in less time than CB1190 when the initial biomass concentration was 0.74 mg COD/L; metabolic biodegradation was favored at higher initial biomass concentrations and higher initial 1,4-dioxane concentrations. 1,4-Dioxane biodegradation was inhibited when oxygen was below 1.5 mg/L. The kinetic model provides a framework for comparing in situ biodegradation of 1,4-dioxane via bioaugmentation with cultures that use the contaminant as a growth substrate to those that achieve biodegradation via cometabolism.
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Affiliation(s)
| | - David L Freedman
- Department of Environmental Engineering and Earth Sciences, Clemson University, Clemson, SC, 29634, USA.
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Inoue D, Tsunoda T, Yamamoto N, Ike M, Sei K. 1,4-Dioxane degradation characteristics of Rhodococcus aetherivorans JCM 14343. Biodegradation 2018; 29:301-310. [PMID: 29696449 DOI: 10.1007/s10532-018-9832-2] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Accepted: 04/22/2018] [Indexed: 11/24/2022]
Abstract
Rhodococcus aetherivorans JCM 14343 can degrade 1,4-dioxane as a sole carbon and energy source. This study aimed to characterize this 1,4-dioxane degradation ability further, and assess the potential use of the strain for 1,4-dioxane removal in industrial wastewater. Strain JCM 14343 was able to degrade 1,4-dioxane inducibly, and its 1,4-dioxane degradation was also induced by tetrahydrofuran and 1,4-butanediol. The demonstration that 1,4-butanediol not only induced but also enhanced 1,4-dioxane degradation was a novel finding of this study. Although strain JCM 14343 appeared not to be an effective 1,4-dioxane degrader considering the maximum specific 1,4-dioxane degradation rate (0.0073 mg-dioxane/mg-protein/h), half saturation concentration (59.2 mg/L), and cell yield (0.031 mg-protein/mg-1,4-dioxane), the strain could degrade over 1100 mg/L of 1,4-dioxane and maintain its degradation activity at a wide range of temperature (5-40 °C) and pH (4-9) conditions. This suggests the usefulness of strain JCM 14343 in 1,4-dioxane treatment under acidic and cold conditions. In addition, 1,4-dioxane degradation experiments in the presence of ethylene glycol (EG) or other cyclic ethers revealed that 1,4-dioxane degradation by strain JCM 14343 was inhibited in the presence of other cyclic ethers, but not by EG, suggesting certain applicability of strain JCM 14343 for industrial wastewater treatment.
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Affiliation(s)
- Daisuke Inoue
- Division of Sustainable Energy and Environmental Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan.
| | - Tsubasa Tsunoda
- Environment and Medical Sciences Course, Graduate School of Medical Sciences, Kitasato University, 1-15-1 Kitasato, Sagamihara-Minami, Kanagawa, 252-0373, Japan
| | - Norifumi Yamamoto
- Division of Sustainable Energy and Environmental Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan.,Technology Center, Taisei Corporation, 344-1 Nase-cho, Totsuka-ku, Yokohama, Kanagawa, 245-0051, Japan
| | - Michihiko Ike
- Division of Sustainable Energy and Environmental Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Kazunari Sei
- Environment and Medical Sciences Course, Graduate School of Medical Sciences, Kitasato University, 1-15-1 Kitasato, Sagamihara-Minami, Kanagawa, 252-0373, Japan.,Department of Health Science, Kitasato University, 1-15-1 Kitasato, Sagamihara-Minami, Kanagawa, 252-0373, Japan
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Yamamoto N, Saito Y, Inoue D, Sei K, Ike M. Characterization of newly isolated Pseudonocardia sp. N23 with high 1,4-dioxane-degrading ability. J Biosci Bioeng 2018; 125:552-558. [PMID: 29301721 DOI: 10.1016/j.jbiosc.2017.12.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 11/14/2017] [Accepted: 12/08/2017] [Indexed: 10/18/2022]
Abstract
This study was conducted to elucidate the 1,4-dioxane degradation characteristics of a newly isolated 1,4-dioxane-degrading bacterial strain and evaluate the applicability of the strain to biological 1,4-dioxane removal from wastewater. A bacterial strain (designated strain N23) capable of degrading 1,4-dioxane as the sole carbon and energy source was isolated from an enrichment culture prepared from 1,4-dioxane-contaminated groundwater. Strain N23 was phylogenetically identified as belonging to the genus Pseudonocardia, based on 16S rRNA gene sequencing. 1,4-Dioxane degradation experiments revealed that strain N23 is capable of constitutive 1,4-dioxane degradation. Further, this strain exhibited the highest specific 1,4-dioxane degradation rate of 0.230 mg-1,4-dioxane (mg-protein)-1 h-1 among 1,4-dioxane-degrading bacteria with constitutively expressed degrading enzymes reported to date. In addition, strain N23 was shown to degrade up to 1100 mg L-1 of 1,4-dioxane without significant inhibition, and to maintain a high level of 1,4-dioxane degradation activity under a wide pH (pH 3.8-8.2) and temperature (20-35 °C) range. In particular, the specific 1,4-dioxane degradation rate, even at pH 3.8, was 83% of the highest rate at pH 7.0. In addition, strain N23 was capable of utilizing ethylene glycol and diethylene glycol, which are both considered to be present in 1,4-dioxane-containing industrial wastewater, as the sole carbon source. The present results indicate that strain N23 exhibits the potential for 1,4-dioxane removal from industrial wastewater.
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Affiliation(s)
- Norifumi Yamamoto
- Technology Center, Taisei Corporation, 344-1 Nase-cho, Totsuka-ku, Yokohama, Kanagawa 245-0051, Japan; Division of Sustainable Energy and Environmental Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
| | - Yuji Saito
- Technology Center, Taisei Corporation, 344-1 Nase-cho, Totsuka-ku, Yokohama, Kanagawa 245-0051, Japan
| | - Daisuke Inoue
- Division of Sustainable Energy and Environmental Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Kazunari Sei
- Department of Health Science, Kitasato University, 1-15-1 Kitasato, Sagamihara-Minami, Kanagawa 252-0373, Japan
| | - Michihiko Ike
- Division of Sustainable Energy and Environmental Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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Inoue D, Tsunoda T, Sawada K, Yamamoto N, Saito Y, Sei K, Ike M. 1,4-Dioxane degradation potential of members of the genera Pseudonocardia and Rhodococcus. Biodegradation 2016; 27:277-286. [PMID: 27623820 DOI: 10.1007/s10532-016-9772-7] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Accepted: 09/07/2016] [Indexed: 11/30/2022]
Abstract
In recent years, several strains capable of degrading 1,4-dioxane have been isolated from the genera Pseudonocardia and Rhodococcus. This study was conducted to evaluate the 1,4-dioxane degradation potential of phylogenetically diverse strains in these genera. The abilities to degrade 1,4-dioxane as a sole carbon and energy source and co-metabolically with tetrahydrofuran (THF) were evaluated for 13 Pseudonocardia and 12 Rhodococcus species. Pseudonocardia dioxanivorans JCM 13855T, which is a 1,4-dioxane degrading bacterium also known as P. dioxanivorans CB1190, and Rhodococcus aetherivorans JCM 14343T could degrade 1,4-dioxane as the sole carbon and energy source. In addition to these two strains, ten Pseudonocardia strains could degrade THF, but no Rhodococcus strains could degrade THF. Of the ten Pseudonocardia strains, Pseudonocardia acacia JCM 16707T and Pseudonocardia asaccharolytica JCM 10410T degraded 1,4-dioxane co-metabolically with THF. These results indicated that 1,4-dioxane degradation potential, including degradation for growth and by co-metabolism with THF, is possessed by selected strains of Pseudonocardia and Rhodococcus, although THF degradation potential appeared to be widely distributed in Pseudonocardia. Analysis of soluble di-iron monooxygenase (SDIMO) α-subunit genes in THF and/or 1,4-dioxane degrading strains revealed that not only THF and 1,4-dioxane monooxygenases but also propane monooxygenase-like SDIMOs can be involved in 1,4-dioxane degradation.
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Affiliation(s)
- Daisuke Inoue
- Department of Health Science, Kitasato University, 1-15-1 Kitasato, Sagamihara-Minami, Kanagawa, 252-0373, Japan. .,Environment and Medical Sciences Course, Graduate School of Medical Sciences, Kitasato University, 1-15-1 Kitasato, Sagamihara-Minami, Kanagawa, 252-0373, Japan.
| | - Tsubasa Tsunoda
- Environment and Medical Sciences Course, Graduate School of Medical Sciences, Kitasato University, 1-15-1 Kitasato, Sagamihara-Minami, Kanagawa, 252-0373, Japan
| | - Kazuko Sawada
- Department of Health Science, Kitasato University, 1-15-1 Kitasato, Sagamihara-Minami, Kanagawa, 252-0373, Japan
| | - Norifumi Yamamoto
- Technology Center, Taisei Corporation, 344-1 Nase-cho, Totsuka-ku, Yokohama, Kanagawa, 245-0051, Japan.,Division of Sustainable Energy and Environmental Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Yuji Saito
- Technology Center, Taisei Corporation, 344-1 Nase-cho, Totsuka-ku, Yokohama, Kanagawa, 245-0051, Japan
| | - Kazunari Sei
- Department of Health Science, Kitasato University, 1-15-1 Kitasato, Sagamihara-Minami, Kanagawa, 252-0373, Japan.,Environment and Medical Sciences Course, Graduate School of Medical Sciences, Kitasato University, 1-15-1 Kitasato, Sagamihara-Minami, Kanagawa, 252-0373, Japan
| | - Michihiko Ike
- Division of Sustainable Energy and Environmental Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
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