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Schittich AR, Fenner K, Stedmon CA, Xu J, McKnight US, Smets BF. Coupling pathway prediction and fluorescence spectroscopy to assess the impact of auxiliary substrates on micropollutant biodegradation. Environ Microbiol 2024; 26:e16560. [PMID: 38234207 DOI: 10.1111/1462-2920.16560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Accepted: 12/08/2023] [Indexed: 01/19/2024]
Abstract
Some bacteria can degrade organic micropollutants (OMPs) as primary carbon sources. Due to typically low OMP concentrations, these bacteria may benefit from supplemental assimilation of natural substrates present in the pool of dissolved organic matter (DOM). The biodegradability of such auxiliary substrates and the impacts on OMP removal are tightly linked to biotransformation pathways. Here, we aimed to elucidate the biodegradability and effect of different DOM constituents for the carbofuran degrader Novosphingobium sp. KN65.2, using a novel approach that combines pathway prediction, laboratory experiments, and fluorescence spectroscopy. Pathway prediction suggested that ring hydroxylation reactions catalysed by Rieske-type dioxygenases and flavin-dependent monooxygenases determine the transformability of the 11 aromatic compounds used as model DOM constituents. Our approach further identified two groups with distinct transformation mechanisms amongst the four growth-supporting compounds selected for mixed substrate biodegradation experiments with the pesticide carbofuran (Group 1: 4-hydroxybenzoic acid, 4-hydroxybenzaldehyde; Group 2: p-coumaric acid, ferulic acid). Carbofuran biodegradation kinetics were stable in the presence of both Group 1 and Group 2 auxiliary substrates. However, Group 2 substrates would be preferable for bioremediation processes, as they showed constant biodegradation kinetics under different experimental conditions (pre-growing KN65.2 on carbofuran vs. DOM constituent). Furthermore, Group 2 substrates were utilisable by KN65.2 in the presence of a competitor (Pseudomonas fluorescens sp. P17). Our study thus presents a simple and cost-efficient approach that reveals mechanistic insights into OMP-DOM biodegradation.
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Affiliation(s)
- Anna-Ricarda Schittich
- Department of Environmental and Resource Engineering, Technical University of Denmark, Lyngby, Denmark
- Sino-Danish Center for Education and Research, Denmark
- Department of Civil and Environmental Engineering, University of California Berkeley, Berkeley, California, USA
| | - Kathrin Fenner
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland
- University of Zürich, Department of Chemistry, Zürich, Switzerland
| | - Colin A Stedmon
- National Institute of Aquatic Research, Technical University of Denmark, Lyngby, Denmark
| | - Jianxin Xu
- Department of Environmental and Resource Engineering, Technical University of Denmark, Lyngby, Denmark
| | - Ursula S McKnight
- Swedish Meteorological and Hydrological Institute, Norrköping, Sweden
| | - Barth F Smets
- Department of Environmental and Resource Engineering, Technical University of Denmark, Lyngby, Denmark
- Sino-Danish Center for Education and Research, Denmark
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2
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Clark C, Rhea LK. Cometabolism of Chlorinated Volatile Organic Compounds and 1,4-Dioxane in Groundwater. WATER 2023; 15:1-12. [PMID: 38264201 PMCID: PMC10805244 DOI: 10.3390/w15223952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/25/2024]
Abstract
This article provides an overview of the bioremediation of groundwater plumes containing admixtures of chlorinated volatile organic compounds (CVOCs) and 1,4-dioxane. The remediation of these plumes has historically focused on the reductive dechlorination of the CVOCs. Many of the remaining plumes are relatively large, and contaminant concentrations are diluted below the concentrations that can sustain reductive dechlorination. Cometabolic processes can decrease contaminant concentrations below the thresholds needed to support direct metabolism but typically require the addition of a substrate, such as high-purity propane. Relatively intensive site characterization and monitoring is necessary to implement bioremediation.
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Affiliation(s)
- Catherine Clark
- Subsurface Remediation Branch, Groundwater Characterization and Remediation Division, Center for Environmental Solutions and Emergency Response, U.S. Environmental Protection Agency, 919 Kerr Research Drive, Ada, OK 74820, USA
| | - Lee K. Rhea
- Subsurface Remediation Branch, Groundwater Characterization and Remediation Division, Center for Environmental Solutions and Emergency Response, U.S. Environmental Protection Agency, 919 Kerr Research Drive, Ada, OK 74820, USA
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3
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Samadi A, Kermanshahi-Pour A, Budge SM, Huang Y, Jamieson R. Biodegradation of 1,4-dioxane by a native digestate microbial community under different electron accepting conditions. Biodegradation 2023; 34:283-300. [PMID: 36808270 DOI: 10.1007/s10532-023-10019-4] [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: 06/20/2022] [Accepted: 02/06/2023] [Indexed: 02/21/2023]
Abstract
The potential of a native digestate microbial community for 1,4-dioxane (DX) biodegradation was evaluated under low dissolved oxygen (DO) concentrations (1-3 mg/L) under different conditions in terms of electron acceptors, co-substrates, co-contaminants and temperature. Complete DX biodegradation (detection limit of 0.01 mg/L) of initial 25 mg/L was achieved in 119 days under low DO concentrations, while complete biodegradation happened faster at 91 and 77 days, respectively in nitrate-amended and aerated conditions. In addition, conducting biodegradation at 30 ˚C showed that the time required for complete DX biodegradation in unamended flasks reduced from 119 days in ambient condition (20-25 °C) to 84 days. Oxalic acid, which is a common metabolite of DX biodegradation was identified in the flasks under different treatments including unamended, nitrate-amended and aerated conditions. Furthermore, transition of the microbial community was monitored during the DX biodegradation period. While the overall richness and diversity of the microbial community decreased, several families of known DX-degrading bacteria such as Pseudonocardiaceae, Xanthobacteraceae and Chitinophagaceae were able to maintain and grow in different electron-accepting conditions. The results suggested that DX biodegradation under low DO concentrations, where no external aeration was provided, is possible by the digestate microbial community, which can be helpful to the ongoing research for DX bioremediation and natural attenuation.
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Affiliation(s)
- Aryan Samadi
- Biorefining and Remediation Laboratory, Department of Process Engineering and Applied Science, Dalhousie University, Halifax, NS, Canada
| | - Azadeh Kermanshahi-Pour
- Biorefining and Remediation Laboratory, Department of Process Engineering and Applied Science, Dalhousie University, Halifax, NS, Canada.
| | - Suzanne M Budge
- Department of Process Engineering and Applied Science, Dalhousie University, 1360 Barrington Street, Halifax, NS, B3H 4R2, Canada
| | - Yannan Huang
- Centre for Water Resources Studies, Department of Civil and Resource Engineering, Dalhousie University, Halifax, NS, Canada
| | - Rob Jamieson
- Centre for Water Resources Studies, Department of Civil and Resource Engineering, Dalhousie University, Halifax, NS, Canada
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4
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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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5
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Manz KE, Kulaots I, Greenley CA, Landry PJ, Lakshmi KV, Woodcock MJ, Hellerich L, Bryant JD, Apfelbaum M, Pennell KD. Low-temperature persulfate activation by powdered activated carbon for simultaneous destruction of perfluorinated carboxylic acids and 1,4-dioxane. JOURNAL OF HAZARDOUS MATERIALS 2023; 442:129966. [PMID: 36162307 DOI: 10.1016/j.jhazmat.2022.129966] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 09/08/2022] [Accepted: 09/09/2022] [Indexed: 06/16/2023]
Abstract
Carbonaceous materials have emerged as a method of persulfate activation for remediation. In this study, persulfate activation using powdered activated carbon (PAC) was demonstrated at temperatures relevant to groundwater (5-25 °C). At room temperature, increasing doses of PAC (1-20 g L-1) led to increased persulfate activation (3.06 × 10-6s-1 to 2.10 × 10-4 with 1 and 20 g L-1 PAC). Activation slowed at lower temperatures (5 and 11 °C); however, substantial (>70 %) persulfate activation was achieved. PAC characterization showed that persulfate is activated at the surface of the PAC, as indicated by an increase in the PAC C:O ratio. Similarly, electron paramagnetic resonance (EPR) spectroscopy studies with a spin trapping agents (5,5-dimethyl-1-pyrroline N-oxide (DMPO)) and 2,2,6,6-tetramethylpiperidine (TEMP) revealed that singlet oxygen was not the main oxidizing species in the reaction. DMPO was oxidized to form 5,5-dimethylpyrrolidone-2(2)-oxyl-(1) (DMPOX), which forms in the presence of strong oxidizers, such as sulfate radicals. The persulfate/PAC system is demonstrated to simultaneously degrade both perfluorooctanoic acid (PFOA) and 1,4-dioxane at room temperature and 11 °C. With a 20 g L-1 PAC and 75 mM persulfate, 80 % and 70 % of the PFOA and 1,4-dioxane, respectively, degraded within 6 h at room temperature. At 11 °C, the same PAC and persulfate doses led to 57% dioxane degradation and 54 % PFOA degradation within 6 h. Coupling PAC with persulfate offers an effective, low-cost treatment for simultaneous destruction of 1,4-dioxane and PFOA.
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Affiliation(s)
- Katherine E Manz
- School of Engineering, Brown University, Providence, RI 02912, USA
| | - Indrek Kulaots
- School of Engineering, Brown University, Providence, RI 02912, USA
| | | | - Patrick J Landry
- Department of Chemistry and Chemical Biology and The Baruch '60 Center for Biochemical Solar Energy Research, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
| | - K V Lakshmi
- Department of Chemistry and Chemical Biology and The Baruch '60 Center for Biochemical Solar Energy Research, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
| | | | - Lucas Hellerich
- Woodard & Curran, 213 Court Street, 4th Floor, Middletown, CT 06457, USA
| | - J Daniel Bryant
- Woodard & Curran, 50 Millstone Road, Building 400, East Windsor, NJ 08520, USA
| | - Mike Apfelbaum
- Woodard & Curran, 40 Shattuck Road, Suite 110, Andover, MA 01810, USA
| | - Kurt D Pennell
- School of Engineering, Brown University, Providence, RI 02912, USA.
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6
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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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7
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Aldas-Vargas A, Poursat BAJ, Sutton NB. Potential and limitations for monitoring of pesticide biodegradation at trace concentrations in water and soil. World J Microbiol Biotechnol 2022; 38:240. [PMID: 36261779 PMCID: PMC9581840 DOI: 10.1007/s11274-022-03426-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 09/29/2022] [Indexed: 11/16/2022]
Abstract
Pesticides application on agricultural fields results in pesticides being released into the environment, reaching soil, surface water and groundwater. Pesticides fate and transformation in the environment depend on environmental conditions as well as physical, chemical and biological degradation processes. Monitoring pesticides biodegradation in the environment is challenging, considering that traditional indicators, such as changes in pesticides concentration or identification of pesticide metabolites, are not suitable for many pesticides in anaerobic environments. Furthermore, those indicators cannot distinguish between biotic and abiotic pesticide degradation processes. For that reason, the use of molecular tools is important to monitor pesticide biodegradation-related genes or microorganisms in the environment. The development of targeted molecular (e.g., qPCR) tools, although laborious, allowed biodegradation monitoring by targeting the presence and expression of known catabolic genes of popular pesticides. Explorative molecular tools (i.e., metagenomics & metatranscriptomics), while requiring extensive data analysis, proved to have potential for screening the biodegradation potential and activity of more than one compound at the time. The application of molecular tools developed in laboratory and validated under controlled environments, face challenges when applied in the field due to the heterogeneity in pesticides distribution as well as natural environmental differences. However, for monitoring pesticides biodegradation in the field, the use of molecular tools combined with metadata is an important tool for understanding fate and transformation of the different pesticides present in the environment.
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Affiliation(s)
- Andrea Aldas-Vargas
- Environmental Technology, Wageningen University & Research, P.O. Box 17, 6700 EV, Wageningen, The Netherlands
| | - Baptiste A J Poursat
- Environmental Technology, Wageningen University & Research, P.O. Box 17, 6700 EV, Wageningen, The Netherlands
| | - Nora B Sutton
- Environmental Technology, Wageningen University & Research, P.O. Box 17, 6700 EV, Wageningen, The Netherlands.
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8
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Highly efficient chlorinated solvent uptake by novel covalent organic networks via thiol-ene chemistry. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-03809-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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9
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Degradation of 1,4-dioxane by Newly Isolated Acinetobacter sp. M21 with Molasses as the Auxiliary Substrate. BIOTECHNOL BIOPROC E 2022. [DOI: 10.1007/s12257-021-0212-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Jackson LE, Robertson WM, Rohrssen M, Chappaz A, Lemke LD. Evaluation of 1,4-dioxane attenuation processes at the Gelman Site, Michigan, USA. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 823:153634. [PMID: 35149059 DOI: 10.1016/j.scitotenv.2022.153634] [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: 09/23/2021] [Revised: 01/29/2022] [Accepted: 01/29/2022] [Indexed: 06/14/2023]
Abstract
1,4-Dioxane released at the Gelman Site in Washtenaw County, Michigan, produced a series of contaminant plumes migrating up to 3 km through a heterogenous glacial aquifer system. An analysis of 1,4-dioxane concentrations in the Eastern Area of the Gelman Site between 2011 and 2017 documented a mass balance deficit of 2200 kg in excess of 2100 kg of 1,4-dioxane removed via remediation. Five mechanisms were evaluated to account for the mass deficiency: sorption, matrix diffusion, biodegradation, surface discharge, and bypass of the existing monitoring well network. The mass of 1,4-dioxane sorbed to aquifer and aquitard materials and the mass of 1,4-dioxane diffused into low permeability zones were estimated. However, decreasing aqueous concentrations across most of the contaminated area between 2011 and 2017 are expected to induce desorption and back diffusion during this period. Surface water discharge to a storm drain in the downgradient portion of the site was analyzed using concentration measurements and stream gage data. Results suggest that 1,4-dioxane mass entering the drain during the period between 2011 and 2017 was insufficient to account for the mass deficiency. Although available geochemical measurements indicate predominantly anaerobic aquifer conditions at the Gelman Site, biodegradation of 1,4-dioxane was estimated using first order decay rate constants from other sites where conditions may be more favorable. Results suggest that biodegradation could explain some but not all of the missing mass. Bypass of the downgradient monitoring well network is the most parsimonious explanation for the 1,4-dioxane mass deficit. This conclusion is supported by documented flow path complexity through the aquifer system and the sparse density of monitoring wells in the downgradient Eastern Area. These findings underscore the importance of characterizing aquifer heterogeneity when modeling and remediating persistent groundwater contaminants such as 1,4-dioxane.
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Affiliation(s)
- Leah E Jackson
- Oklahoma Geological Survey, Mewbourne College of Earth and Energy, The University of Oklahoma, Norman, OK 73019, USA; Earth and Ecosystem Science Program, Central Michigan University, Mount Pleasant, MI 48859, USA.
| | - Wendy M Robertson
- Department of Earth and Atmospheric Sciences, Central Michigan University, 314 Brooks Hall, Mount Pleasant, MI 48859, USA; Institute for Great Lakes Research, Central Michigan University, Mount Pleasant, MI 48859, USA
| | - Megan Rohrssen
- Department of Earth and Atmospheric Sciences, Central Michigan University, 314 Brooks Hall, Mount Pleasant, MI 48859, USA
| | - Anthony Chappaz
- Department of Earth and Atmospheric Sciences, Central Michigan University, 314 Brooks Hall, Mount Pleasant, MI 48859, USA; STARLAB, Central Michigan University, Brooks Hall 314, Mount Pleasant, MI 48858, USA
| | - Lawrence D Lemke
- Department of Earth and Atmospheric Sciences, Central Michigan University, 314 Brooks Hall, Mount Pleasant, MI 48859, USA; Institute for Great Lakes Research, Central Michigan University, Mount Pleasant, MI 48859, USA
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11
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García ÁAR, Adamson DT, Wilson JT, Lebrón C, Danko AS, Freedman DL. Evaluation of natural attenuation of 1,4-dioxane in groundwater using a 14C assay. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127540. [PMID: 34763286 DOI: 10.1016/j.jhazmat.2021.127540] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 10/06/2021] [Accepted: 10/15/2021] [Indexed: 06/13/2023]
Abstract
Monitored Natural Attenuation (MNA) is a preferred remedy for sites contaminated with 1,4-dioxane due to its low cost and limited environmental impacts compared to active remediation. Having a robust estimate of the rate at which biodegradation occurs is an essential component of assessing MNA. In this study, an assay was developed using 14C-labeled 1,4-dioxane to measure rate constants for biodegradation based on accumulation of 14C products. Purification of the 14C-1,4-dioxane stock solution lowered the level of 14C impurities to below 1% of the total 14C activity. This enabled determination of rate constants in groundwater as low as 0.0021 yr-1, equating to a half-life greater than 300 years. Of the 54 groundwater samples collected from 10 sites in the US, statistically significant rate constants were determined with the 14C assay for 24. The median rate constant was 0.0138 yr-1 (half-life = 50 yr); the maximum rate constant was 0.367 yr-1 (half-life = 1.9 yr). The results confirmed that biodegradation of 1,4-dioxane is occurring at 9 of the 10 sites sampled, albeit with considerable variability in the level of activity. The specificity of the assay was confirmed using acetylene and the absence of oxygen to inhibit monooxygenases.
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Affiliation(s)
- Ángel A Ramos García
- Department of Environmental Engineering and Earth Sciences, Clemson University, Clemson, SC 29634, USA
| | | | - John T Wilson
- Scissortail Environmental Solutions LLC., Ada, OK, USA
| | | | - Anthony S Danko
- Naval Facilities Engineering Systems Command - Engineering and Expeditionary Warfare Center, Port Hueneme, CA, USA
| | - David L Freedman
- Department of Environmental Engineering and Earth Sciences, Clemson University, Clemson, SC 29634, USA.
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12
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Response of anammox bacteria to short-term exposure of 1,4-dioxane: Bacterial activity and community dynamics. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118539] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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13
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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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14
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Ren H, Li H, Wang H, Huang H, Lu Z. Biodegradation of Tetrahydrofuran by the Newly Isolated Filamentous Fungus Pseudallescheria boydii ZM01. Microorganisms 2020; 8:microorganisms8081190. [PMID: 32764240 PMCID: PMC7464125 DOI: 10.3390/microorganisms8081190] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 08/02/2020] [Accepted: 08/03/2020] [Indexed: 11/16/2022] Open
Abstract
Tetrahydrofuran (THF) is widely used as a precursor for polymer syntheses and a versatile solvent in industries. THF is an environmental hazard and carcinogenic to humans. In the present study, a new THF-degrading filamentous fungus, Pseudallescheria boydii ZM01, was isolated and characterized. Strain ZM01 can tolerate a maximum THF concentration of 260 mM and can completely degrade 5 mM THF in 48 h, with a maximum THF degradation rate of 133.40 mg THF h−1 g−1 dry weight. Growth inhibition was not observed when the initial THF concentration was below 150 mM, and the maximum THF degradation rate was still maintained at 118.21 mg THF h−1 g−1 dry weight at 50 mM THF, indicating the great potential of this strain to degrade THF at high concentrations. The initial key metabolic intermediate 2-hydroxytetrahydrofuran was detected and identified by gas chromatography (GC) analyses for the first time during the THF degradation process. Analyses of the effects of initial pH, incubation temperature, and heavy metal ions on THF degradation revealed that strain ZM01 can degrade THF under a relatively wide range of conditions and has good degradation ability under low pH and Cu2+ stress, suggesting its adaptability and applicability for industrial wastewater treatment.
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15
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da Silva MLB, He Y, Mathieu J, Alvarez PJJ. Enhanced long-term attenuation of 1,4-dioxane in bioaugmented flow-through aquifer columns. Biodegradation 2020; 31:201-211. [PMID: 32468172 DOI: 10.1007/s10532-020-09903-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Accepted: 05/14/2020] [Indexed: 10/24/2022]
Abstract
Long term natural attenuation of 1,4-dioxane (dioxane) and its enhanced biodegradation after bioaugmentation with Pseudonocardia dioxanivorans CB1190 were assessed using flow-through aquifer columns. Natural attenuation of dioxane was not observed even after 2 years of acclimation. However, dioxane removal was observed in the bioaugmented columns (34% when the influent was 200 µg/L and 92% for 5 mg/L). The thmA gene that encodes the tetrahydrofuran monooxygenase that initiates dioxane degradation by CB1190 was only detected at the inoculation port and persisted for months after inoculation, implying the resiliency of bioaugmentation and its potential to offer long-term enhanced biodegradation capabilities. However, due to extensive clumping and limited mobility of CB1190, the augmented catabolic potential may be restricted to the immediate vicinity of the inoculation port. Accordingly, bioaugmentation with CB1190 seems more appropriate for the establishment of biobarriers. Bioaugmentation efficiency was associated with the availability of oxygen. Aeration of the column influent to increase dissolved oxygen significantly improved dioxane removal (p < 0.05), suggesting that (for sites with oxygen-limiting conditions) bioaugmentation can benefit from engineered approaches for delivering additional oxygen.
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Affiliation(s)
| | - Ya He
- Department of Civil and Environmental Engineering, Rice University, Houston, TX, 77005, USA
| | - Jacques Mathieu
- Department of Civil and Environmental Engineering, Rice University, Houston, TX, 77005, USA
| | - Pedro J J Alvarez
- Department of Civil and Environmental Engineering, Rice University, Houston, TX, 77005, USA
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16
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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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17
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Johnson NW, Gedalanga PB, Zhao L, Gu B, Mahendra S. Cometabolic biotransformation of 1,4-dioxane in mixtures with hexavalent chromium using attached and planktonic bacteria. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 706:135734. [PMID: 31806311 DOI: 10.1016/j.scitotenv.2019.135734] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 11/22/2019] [Accepted: 11/22/2019] [Indexed: 06/10/2023]
Abstract
Biological treatment of 1,4-dioxane, a probable human carcinogen and a recalcitrant contaminant of concern, is often complicated by the presence of inhibitory co-contaminants. Due to its use as a solvent, wetting agent, and stabilizer for chlorinated solvents employed in metal vapor degreasing, 1,4-dioxane has often been found to occur with a variety of co-contaminants, including heavy metals such as hexavalent chromium [Cr(VI)]. Cr(VI) also occurs naturally in groundwater due to geological formations, but also has sources that can coincide with 1,4-dioxane from anthropogenic activities such as metal vapor degreasing. Biodegradation of 1,4-dioxane can be accomplished by microbes that use it as a source of carbon or energy as well as those that cometabolize it after growth on other organic substrates. A propanotroph, Mycobacterium austroafricanum JOB5, was grown in planktonic pure cultures and biofilms to determine its ability to cometabolize 1,4-dioxane in the presence of varying concentrations of Cr(VI). 1,4-Dioxane cometabolism by JOB5 planktonic cells was uninhibited by Cr(VI) at levels up to 10 mg/L, while biofilms were only mildly inhibited at 10 mg/L. As an important part of the biofilms commonly found in subsurface aquifers and engineered systems, extracellular polymeric substances (EPS) were found to play an important role in preventing Cr(VI) exposure to cells. We observed that soluble EPS were able to bind to Cr(VI) and theorize that biofilm-associated EPS additionally served to impede penetration of the biofilm structure by Cr(VI), thus mitigating exposure and toxicity. These findings suggest that bioremediation would be a viable treatment strategy for 1,4-dioxane-contaminated waters that contain elevated levels of Cr(VI) in natural and built environments.
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Affiliation(s)
- Nicholas W Johnson
- Department of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, USA
| | - Phillip B Gedalanga
- Department of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, USA; Department of Public Health, California State University, Fullerton, CA 92834, USA
| | - Linduo Zhao
- Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - Baohua Gu
- Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - Shaily Mahendra
- Department of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, USA.
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18
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Godri Pollitt KJ, Kim JH, Peccia J, Elimelech M, Zhang Y, Charkoftaki G, Hodges B, Zucker I, Huang H, Deziel NC, Murphy K, Ishii M, Johnson CH, Boissevain A, O'Keefe E, Anastas PT, Orlicky D, Thompson DC, Vasiliou V. 1,4-Dioxane as an emerging water contaminant: State of the science and evaluation of research needs. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 690:853-866. [PMID: 31302550 DOI: 10.1016/j.scitotenv.2019.06.443] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 06/26/2019] [Accepted: 06/26/2019] [Indexed: 06/10/2023]
Abstract
1,4-Dioxane has historically been used to stabilize chlorinated solvents and more recently has been found as a contaminant of numerous consumer and food products. Once discharged into the environment, its physical and chemical characteristics facilitate migration in groundwater, resulting in widespread contamination of drinking water supplies. Over one-fifth of U.S. public drinking water supplies contain detectable levels of 1,4-dioxane. Remediation efforts using common adsorption and membrane filtration techniques have been ineffective, highlighting the need for alternative removal approaches. While the data evaluating human exposure and health effects are limited, animal studies have shown chronic exposure to cause carcinogenic responses in the liver across multiple species and routes of exposure. Based on this experimental evidence, the U.S. Environmental Protection Agency has listed 1,4-dioxane as a high priority chemical and classified it as a probable human carcinogen. Despite these health concerns, there are no federal or state maximum contaminant levels for 1,4-dioxane. Effective public health policy for this emerging contaminant requires additional information about human health effects, chemical interactions, environmental fate, analytical detection, and treatment technologies. This review highlights the current state of knowledge, key uncertainties, and data needs for future research on 1,4-dioxane.
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Affiliation(s)
- Krystal J Godri Pollitt
- Department of Environmental Health Sciences, School of Public Health, Yale University, New Haven, CT 06510, United States.
| | - Jae-Hong Kim
- Department of Chemical & Environmental Engineering, School of Engineering & Applied Science, Yale University, New Haven, CT 06520, United States
| | - Jordan Peccia
- Department of Chemical & Environmental Engineering, School of Engineering & Applied Science, Yale University, New Haven, CT 06520, United States
| | - Menachem Elimelech
- Department of Chemical & Environmental Engineering, School of Engineering & Applied Science, Yale University, New Haven, CT 06520, United States
| | - Yawei Zhang
- Department of Environmental Health Sciences, School of Public Health, Yale University, New Haven, CT 06510, United States; Department of Surgery, School of Medicine, Yale University, New Haven, CT 06520, United States
| | - Georgia Charkoftaki
- Department of Environmental Health Sciences, School of Public Health, Yale University, New Haven, CT 06510, United States
| | - Brenna Hodges
- Department of Chemical & Environmental Engineering, School of Engineering & Applied Science, Yale University, New Haven, CT 06520, United States
| | - Ines Zucker
- Department of Chemical & Environmental Engineering, School of Engineering & Applied Science, Yale University, New Haven, CT 06520, United States
| | - Huang Huang
- Department of Environmental Health Sciences, School of Public Health, Yale University, New Haven, CT 06510, United States
| | - Nicole C Deziel
- Department of Environmental Health Sciences, School of Public Health, Yale University, New Haven, CT 06510, United States
| | - Kara Murphy
- Northeast States for Coordinated Air Use Management (NESCAUM), Boston, MA 02111, United States
| | - Momoko Ishii
- Department of Environmental Health Sciences, School of Public Health, Yale University, New Haven, CT 06510, United States
| | - Caroline H Johnson
- Department of Environmental Health Sciences, School of Public Health, Yale University, New Haven, CT 06510, United States
| | | | - Elaine O'Keefe
- Office of Public Health Practice, School of Public Health, Yale University, New Haven, CT 06510, United States
| | - Paul T Anastas
- Department of Environmental Health Sciences, School of Public Health, Yale University, New Haven, CT 06510, United States; Center for Green Chemistry and Green Engineering, Department of Chemistry, Yale School of Forestry & Environmental Studies, New Haven, CT 06511, United States
| | - David Orlicky
- Department of Pathology, University of Colorado School of Medicine, Aurora, CO 80045, United States
| | - David C Thompson
- Department of Clinical Pharmacy, University of Colorado School of Pharmacy, Aurora, CO 80045, United States
| | - Vasilis Vasiliou
- Department of Environmental Health Sciences, School of Public Health, Yale University, New Haven, CT 06510, United States.
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19
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Carbon sources that enable enrichment of 1,4-dioxane-degrading bacteria in landfill leachate. Biodegradation 2019; 31:23-34. [PMID: 31520343 DOI: 10.1007/s10532-019-09891-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Accepted: 09/10/2019] [Indexed: 10/26/2022]
Abstract
1,4-Dioxane (DX) is a recalcitrant cyclic ether that has gained attention as an emerging pollutant in the aquatic environment. Enrichment of indigenous DX-degrading bacteria, which are considered to be minor populations even in DX-impacted environments, is the key for efficient biological DX removal. Therefore, this study aimed to explore carbon sources applicable for the enrichment of DX-degrading bacteria present in landfill leachate, which is a potential source of DX pollution. Microorganisms collected from landfill leachate were cultivated on six different carbon sources (DX, tetrahydrofuran (THF), 1,3,5-trioxane (TX), ethylene glycol (EG), diethylene glycol (DEG), and 1,4-butanediol (BD)) in a sequential batch mode. Consequently, enrichment cultures cultivated on THF in addition to DX improved the DX degradation ability compared to that of the original leachate sample, while those on the other test carbon sources did not. The results indicated that THF can be an alternative carbon source to enrich DX-degrading bacteria, and that TX, EG, DEG and BD are not applicable to concentrate DX-degrading bacteria in complex microbial consortia. In addition, sequencing analyses of 16S rRNA and soluble di-iron monooxygenase (SDIMO) genes revealed notable dominance of thm/dxm genes involved in group 5 SDIMO both in DX- and THF-enrichment cultures. The analysis also showed a predominance of Pseudonocardia in THF-enrichment culture, suggesting that Pseudonocardia harboring thm/dxm genes contributes to enhanced DX degradation in THF-enrichment culture.
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20
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Qiu J, Cheng J, Xie Y, Jiang L, Shi P, Li X, Swanda RV, Zhou J, Wang Y. 1,4-Dioxane exposure induces kidney damage in mice by perturbing specific renal metabolic pathways: An integrated omics insight into the underlying mechanisms. CHEMOSPHERE 2019; 228:149-158. [PMID: 31029960 DOI: 10.1016/j.chemosphere.2019.04.111] [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: 12/29/2018] [Revised: 03/17/2019] [Accepted: 04/14/2019] [Indexed: 06/09/2023]
Abstract
1,4-Dioxane (dioxane), an industrial solvent widely detected in environmental and biological matrices, has potential nephrotoxicity. However, the underlying mechanism by which dioxane induces kidney damage remains unclear. In this study, we used an integrated approach, combining kidney transcriptomics and urine metabolomics, to explore the mechanism for the toxic effects of dioxane on the mouse kidney. Transcriptomics profiling showed that exposure to 0.5 mg/L dioxane induced perturbations of multiple signaling pathways in kidneys, such as MAPK and Wnt, although no changes in oxidative stress indicators or anatomical pathology were observed. Exposure to 500 mg/L dioxane significantly disrupted various metabolic pathways, concomitantly with observed renal tissue damage and stimulated oxidant defense system. Urine metabolomic analysis using NMR indicated that exposure to dioxane gradually altered the metabolic profile of urine. Within the full range of altered metabolites, the metabolic pathway containing glycine, serine and threonine was the most significantly altered pathway at the early stage of exposure (3 weeks) in both 0.5 and 500 mg/L dioxane-treated groups. However, with prolonged exposure (9 and 12 weeks), the level of taurine significantly decreased after treatment of 0.5 mg/L dioxane, while exposure to 500 mg/L dioxane significantly increased glutathione levels in urine and decreased arginine metabolism. Furthermore, integrated omics analysis showed that 500 mg/L dioxane exposure induced arginine deficiency by perturbing several genes involved in renal arginine metabolism. Shortage of arginine coupled with increased oxidative stress could lead to renal dysfunction. These findings offer novel insights into the toxicity of dioxane.
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Affiliation(s)
- Jingfan Qiu
- Key Laboratory of Pathogen Biology of Jiangsu Province, Department of Pathogen Biology, Nanjing Medical University, Nanjing, 211166, China.
| | - Jiade Cheng
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China
| | - Yanci Xie
- Key Laboratory of Pathogen Biology of Jiangsu Province, Department of Pathogen Biology, Nanjing Medical University, Nanjing, 211166, China
| | - Liujing Jiang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China
| | - Peng Shi
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China
| | - Xinying Li
- High School Affiliated to Nanjing Normal University, Nanjing, 210003, China
| | - Robert V Swanda
- Division of Nutritional Sciences, Cornell University, Ithaca, 14853, United States
| | - Jun Zhou
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009, China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, 210009, China
| | - Yong Wang
- Key Laboratory of Pathogen Biology of Jiangsu Province, Department of Pathogen Biology, Nanjing Medical University, Nanjing, 211166, China.
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21
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Vatankhah H, Szczuka A, Mitch WA, Almaraz N, Brannum J, Bellona C. Evaluation of Enhanced Ozone-Biologically Active Filtration Treatment for the Removal of 1,4-Dioxane and Disinfection Byproduct Precursors from Wastewater Effluent. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:2720-2730. [PMID: 30698962 DOI: 10.1021/acs.est.8b06897] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Ozonation followed by biologically active filtration (BAF) (O3-BAF) treatment has become an alternative to reverse osmosis in potable wastewater reuse applications because of the ability to produce a high-quality effluent while reducing brine production and disposal. In this study, effluent from a sequencing batch membrane bioreactor (SBMBR) was treated by O3-BAF at three specific ozone doses (0.5, 0.7, and 1.0 mg O3/mg DOC) and different empty bed contact times (EBCTs; 15-45 min). The reaction of O3 with granular activated carbon (GAC) (O3/GAC) to promote the formation of hydroxyl radicals (·OH) was evaluated at 1.0 mg O3/mg DOC followed by BAF at 15-45 min EBCT. The efficacy of these techniques was compared for the removal of O3 refractory 1,4-dioxane and the reduction in the formation of bromate, 35 regulated and unregulated halogenated disinfection byproducts (DBPs), and 8 N-nitrosamines after chloramination. Conventional ozonation (without the presence of GAC during ozonation) removed 6-11% of 1,4-dioxane, while BAF increased the removal to ∼25%. O3/GAC improved the removal of 1,4-dioxane to ∼40%, while BAF increased the removal to ∼50%. No bromate was detected during conventional ozonation. Although O3/GAC formed 12.5 μg/L bromate, this concentration was reduced during BAF treatment to <6.8 μg/L. Even though conventional ozonation was more effective than O3/GAC for the reduction in chloramine-reactive N-nitrosodimethylamine (NDMA) precursors, BAF treatment after either conventional or enhanced ozonation reduced NDMA formation during chloramination to <10 ng/L. O3/GAC was more effective at reducing halogenated DBP formation during postchloramination. Regardless, the reduction in halogenated DBP formation during postchloramination achieved by BAF treatment was ∼90% relative to the formation in the SBMBR effluent after either conventional or enhanced ozonation. The reduction of haloacetic acid (HAA) formation improved moderately with increasing BAF EBCT. Both O3-BAF and (O3/GAC)-BAF met regulatory levels for trihalomethanes, HAAs, NDMA, and bromate.
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Affiliation(s)
- Hooman Vatankhah
- Department of Civil and Environmental Engineering , Colorado School of Mines , 1500 Illinois Street , Golden , Colorado 80401 , United States
- National Science Foundation Engineering Research Center for Re-Inventing the Nation's Urban Water Infrastructure (ReNUWIt) , Stanford , California 94305 , United States
| | - Aleksandra Szczuka
- Department of Civil and Environmental Engineering , Stanford University , 473 Via Ortega , Stanford , California 94305 , United States
- National Science Foundation Engineering Research Center for Re-Inventing the Nation's Urban Water Infrastructure (ReNUWIt) , Stanford , California 94305 , United States
| | - William A Mitch
- Department of Civil and Environmental Engineering , Stanford University , 473 Via Ortega , Stanford , California 94305 , United States
- National Science Foundation Engineering Research Center for Re-Inventing the Nation's Urban Water Infrastructure (ReNUWIt) , Stanford , California 94305 , United States
| | - Nohemi Almaraz
- Department of Civil and Environmental Engineering , Colorado School of Mines , 1500 Illinois Street , Golden , Colorado 80401 , United States
| | - Jacob Brannum
- Department of Civil and Environmental Engineering , Colorado School of Mines , 1500 Illinois Street , Golden , Colorado 80401 , United States
- National Science Foundation Engineering Research Center for Re-Inventing the Nation's Urban Water Infrastructure (ReNUWIt) , Stanford , California 94305 , United States
| | - Christopher Bellona
- Department of Civil and Environmental Engineering , Colorado School of Mines , 1500 Illinois Street , Golden , Colorado 80401 , United States
- National Science Foundation Engineering Research Center for Re-Inventing the Nation's Urban Water Infrastructure (ReNUWIt) , Stanford , California 94305 , United States
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22
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Zhao L, Lu X, Polasko A, Johnson NW, Miao Y, Yang Z, Mahendra S, Gu B. Co-contaminant effects on 1,4-dioxane biodegradation in packed soil column flow-through systems. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 243:573-581. [PMID: 30216889 DOI: 10.1016/j.envpol.2018.09.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 08/10/2018] [Accepted: 09/03/2018] [Indexed: 06/08/2023]
Abstract
Biodegradation of 1,4-dioxane was examined in packed quartz and soil column flow-through systems. The inhibitory effects of co-contaminants, specifically trichloroethene (TCE), 1,1-dichloroethene (1,1-DCE), and copper (Cu2+) ions, were investigated in the columns either with or without bioaugmentation with a 1,4-dioxane degrading bacterium Pseudonocardia dioxanivorans CB1190. Results indicate that CB1190 cells readily grew and colonized in the columns, leading to significant degradation of 1,4-dioxane under oxic conditions. Degradation of 1,4-dioxane was also observed in the native soil (without bioaugmentation), which had been previously subjected to enhanced reductive dechlorination treatment for co-contaminants TCE and 1,1-DCE. Bioaugmentation of the soil with CB1190 resulted in nearly complete degradation at influent concentrations of 3-10 mg L-1 1,4-dioxane and a residence reaction time of 40-80 h, but the presence of co-contaminants, 1,1-DCE and Cu2+ ions (up to 10 mg L-1), partially inhibited 1,4-dioxane degradation in the untreated and bioaugmented soil columns. However, the inhibitory effects were much less severe in the column flow-through systems than those previously observed in planktonic cultures, which showed near complete inhibition at the same co-contaminant concentrations. These observations demonstrate a low susceptibility of soil microbes to the toxicity of 1,1-DCE and Cu2+ in packed soil flow-through systems, and thus have important implications for predicting biodegradation potential and developing sustainable, cost-effective technologies for in situ remediation of 1,4-dioxane contaminated soils and groundwater.
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Affiliation(s)
- Linduo Zhao
- Environmental Science Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, United States
| | - Xia Lu
- Environmental Science Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, United States
| | - Alexandra Polasko
- Department of Civil and Environmental Engineering, University of California, Los Angeles, CA, 90095, United States
| | - Nicholas W Johnson
- Department of Civil and Environmental Engineering, University of California, Los Angeles, CA, 90095, United States
| | - Yu Miao
- Department of Civil and Environmental Engineering, University of California, Los Angeles, CA, 90095, United States
| | - Ziming Yang
- Department of Chemistry, Oakland University, Rochester, MI 48309, United States
| | - Shaily Mahendra
- Department of Civil and Environmental Engineering, University of California, Los Angeles, CA, 90095, United States
| | - Baohua Gu
- Environmental Science Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, United States; Department of Biosystems Engineering and Soil Science, University of Tennessee, Knoxville, TN, 37996, United States.
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23
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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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24
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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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25
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Li M, Yang Y, He Y, Mathieu J, Yu C, Li Q, Alvarez PJJ. Detection and cell sorting of Pseudonocardia species by fluorescence in situ hybridization and flow cytometry using 16S rRNA-targeted oligonucleotide probes. Appl Microbiol Biotechnol 2018; 102:3375-3386. [DOI: 10.1007/s00253-018-8801-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 12/19/2017] [Accepted: 01/21/2018] [Indexed: 10/18/2022]
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26
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da Silva MLB, Woroszylo C, Castillo NF, Adamson DT, Alvarez PJJ. Associating potential 1,4-dioxane biodegradation activity with groundwater geochemical parameters at four different contaminated sites. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 206:60-64. [PMID: 29059571 DOI: 10.1016/j.jenvman.2017.10.031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 10/09/2017] [Accepted: 10/12/2017] [Indexed: 06/07/2023]
Abstract
1,4-Dioxane (dioxane) is a groundwater contaminant of emerging concern for which bioremediation may become a practical remediation strategy. Therefore, it is important to advance our heuristic understanding of geochemical parameters that are most influential on the potential success of intrinsic bioremediation of dioxane-impacted sites. Here, Pearson's and Spearman's correlation and linear regression analyses were conducted to discern associations between 1,4-dioxane biodegradation activity measured in aerobic microcosms and groundwater geochemical parameters at four different contaminated sites. Dissolved oxygen, which is known to limit dioxane biodegradation, was excluded as a limiting factor in this analysis. Biodegradation activity was positively associated with dioxane concentrations (p < 0.01; R < 0.70) as well as the number of catabolic thmA gene copies (p < 0.01; R = 0.80) encoding dioxane monooxygenase. Thus, whereas environmental factors such as pH, temperature, and nutrients may influence dioxane biodegradation, these parameters did not exert as strong of an influence on potential biodegradation activity as the in situ concentration of substrate dioxane at the time of sampling. This analysis infers that aerobic sites with higher dioxane concentrations are more likely to select and sustain a thriving population of dioxane degraders, while sites with relatively low dioxane concentrations would be more difficult to attenuate naturally and may require alternative remediation strategies.
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Affiliation(s)
- Márcio Luís Busi da Silva
- Department of Civil and Environmental Engineering, Rice University, Houston, TX 77005, United States.
| | | | | | | | - Pedro J J Alvarez
- Department of Civil and Environmental Engineering, Rice University, Houston, TX 77005, United States
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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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Guan X, Liu F, Wang J, Li C, Zheng X. Mechanism of 1,4-dioxane microbial degradation revealed by 16S rRNA and metatranscriptomic analyses. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2018; 77:123-133. [PMID: 29339611 DOI: 10.2166/wst.2017.498] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
1,4-Dioxane (dioxane), a probable human carcinogen, often exists in industrial wastewater and domestic sewage. In this study, we applied 16S rRNA and metatranscriptomic methods to analyze the dioxane biodegradation mechanism by activated sludge. Tetrahydrofuran (THF) was added as an essential co-metabolite to promote the degradation of dioxane. We found the dioxane removal ratio increased with increasing THF concentrations. When the THF concentration increased from 60.0 to 200.0 mg/L, the dioxane degradation rate was stable. Three additions of ∼60.0 mg/L THF resulted in better dioxane degradation than one addition of 200 mg/L THF. Ammonia-oxidizing and denitrifying bacteria with methane monooxygenases (MOs) and ammonia MOs played the most important roles during the degradation of dioxane. Kyoto Encyclopedia of Genes and Genomes metabolic pathway and functional genes analyses showed that the activated sludge system was complex and stable when dioxane was added. In future studies, primers should be designed to identify specific bacteria and functional MO genes, which would help reveal the function of various bacteria and their MOs during dioxane degradation.
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Affiliation(s)
- Xiangyu Guan
- School of Ocean Sciences, China University of Geosciences, No. 29 Xueyuan Road, Haidian District, Beijing 100083, China E-mail:
| | - Fei Liu
- Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences, Beijing 100083, China
| | - Jing Wang
- School of Ocean Sciences, China University of Geosciences, No. 29 Xueyuan Road, Haidian District, Beijing 100083, China E-mail:
| | - Caoxiang Li
- Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences, Beijing 100083, China
| | - Xiaoxuan Zheng
- School of Ocean Sciences, China University of Geosciences, No. 29 Xueyuan Road, Haidian District, Beijing 100083, China E-mail:
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He Y, Mathieu J, da Silva MLB, Li M, Alvarez PJJ. 1,4-Dioxane-degrading consortia can be enriched from uncontaminated soils: prevalence of Mycobacterium and soluble di-iron monooxygenase genes. Microb Biotechnol 2017; 11:189-198. [PMID: 28984418 PMCID: PMC5743803 DOI: 10.1111/1751-7915.12850] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 08/07/2017] [Accepted: 08/08/2017] [Indexed: 12/22/2022] Open
Abstract
Two bacterial consortia were enriched from uncontaminated soil by virtue of their ability to grow on 1,4‐dioxane (dioxane) as a sole carbon and energy source. Their specific dioxane degradation rates at 30°C, pH = 7 (i.e. 5.7 to 7.1 g‐dioxane per g‐protein per day) were comparable to those of two dioxane‐metabolizing archetypes: Pseudonocardia dioxanivoransCB1190 and Mycobacterium dioxanotrophicusPH‐06. Based on 16S rRNA sequencing, Mycobacterium was the dominant genus. Acetylene inhibition tests suggest that dioxane degradation was mediated by monooxygenases. However, qPCR analyses targeting the tetrahydrofuran/dioxane monooxygenase gene (thmA/dxmA) (which is, to date, the only sequenced dioxane monooxygenase gene) were negative, indicating that other (as yet unknown) catabolic gene(s) were responsible. DNA sequence analyses also showed threefold to sevenfold enrichment of group 5 and group 6 soluble di‐iron monooxygenase (SDIMO) genes relative to the original soil samples. Whereas biodegradation of trace levels of dioxane is a common challenge at contaminated sites, both consortia degraded dioxane at low initial concentrations (300 μg l−1) below detectable levels (5 μg l−1) in bioaugmented microcosms prepared with impacted groundwater. Overall, this work shows that dioxane‐degrading bacteria (and the associated natural attenuation potential) exist even in some uncontaminated soils, and may be enriched to broaden bioaugmentation options for sites experiencing insufficient dioxane catabolic capacity.
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Affiliation(s)
- Ya He
- Department of Civil and Environmental Engineering, Rice University, Houston, TX, 77005, USA
| | - Jacques Mathieu
- Department of Civil and Environmental Engineering, Rice University, Houston, TX, 77005, USA
| | - Marcio L B da Silva
- Department of Civil and Environmental Engineering, Rice University, Houston, TX, 77005, USA
| | - Mengyan Li
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ, 07102, USA
| | - Pedro J J Alvarez
- Department of Civil and Environmental Engineering, Rice University, Houston, TX, 77005, USA
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Li M, Liu Y, He Y, Mathieu J, Hatton J, DiGuiseppi W, Alvarez PJJ. Hindrance of 1,4-dioxane biodegradation in microcosms biostimulated with inducing or non-inducing auxiliary substrates. WATER RESEARCH 2017; 112:217-225. [PMID: 28161562 DOI: 10.1016/j.watres.2017.01.047] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 01/20/2017] [Accepted: 01/23/2017] [Indexed: 06/06/2023]
Abstract
A microcosm study was conducted to assess two biostimulation strategies (relative to natural attenuation) to bioremediate 1,4-dioxane contamination at a site in west Texas. Dioxane concentrations were relatively low (<300 μg/L), which represents a potential challenge to sustain and induce specific degraders. Thus, biostimulation was attempted with an auxiliary substrate known to induce dioxane-degrading monooxygenases (i.e., tetrahydrohyran [THF]) or with a non-inducing growth substrate (1-butanol [1-BuOH]). Amendment of 1-BuOH (100 mg/L) to microcosms that were not oxygen-limited temporarily enhanced dioxane biodegradation by the indigenous microorganisms. However, this stimulatory effect was not sustained by repeated amendments, which might be attributed to i) the inability of 1-BuOH to induce dioxane-degrading enzymes, ii) curing of catabolic plasmids, iii) metabolic flux dilution and catabolite repression, and iv) increased competition by commensal bacteria that do not degrade dioxane. Experiments with the archetype dioxane degrader Pseudonocardia dioxanivorans CB1190 repeatedly amended with 1-BuOH (500 mg/L added weekly for 4 weeks) corroborated the partial curing of catabolic plasmids (9.5 ± 7.4% was the plasmid retention ratio) and proliferation of derivative segregants that lost their ability to degrade dioxane. Addition of THF (300 μg/L) also had limited benefit due to competitive inhibition; significant dioxane degradation occurred only when the THF concentration decreased below approximately 160 μg/L. Overall, these results illustrate the importance of considering the possibility of unintentional hindrance of catabolism associated with the addition of auxiliary carbon sources to bioremediate aquifers impacted with trace concentrations of dioxane.
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Affiliation(s)
- Mengyan Li
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ, USA; Department of Civil and Environmental Engineering, Rice University, Houston, TX, USA.
| | - Yuanyuan Liu
- Research Center of Resource Environment and Urban Planning, Changsha University of Science and Technology, Changsha, Hunan, China
| | - Ya He
- Department of Civil and Environmental Engineering, Rice University, Houston, TX, USA
| | - Jacques Mathieu
- Department of Civil and Environmental Engineering, Rice University, Houston, TX, USA
| | | | | | - Pedro J J Alvarez
- Department of Civil and Environmental Engineering, Rice University, Houston, TX, USA
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31
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Fedorchuk OI, Kobylinska NG, Zaitsev VN. Headspace gas chromatographic determination of 1,4-dioxane with adsorption preconcentration on silica modified with λ-carrageenan. JOURNAL OF ANALYTICAL CHEMISTRY 2017. [DOI: 10.1134/s1061934817010063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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32
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Chiang SYD, Anderson RH, Wilken M, Walecka-Hutchison C. Practical Perspectives of 1,4-Dioxane Investigation and Remediation. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/rem.21494] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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33
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DiGuiseppi W, Walecka-Hutchison C, Hatton J. 1,4-Dioxane Treatment Technologies. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/rem.21498] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | | | - Jim Hatton
- CH2M's Site Remediation and Restoration Group, Englewood, Colorado
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34
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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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35
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Zhang S, Gedalanga PB, Mahendra S. Biodegradation Kinetics of 1,4-Dioxane in Chlorinated Solvent Mixtures. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:9599-9607. [PMID: 27486928 DOI: 10.1021/acs.est.6b02797] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This study investigated the impacts of individual chlorinated solvents and their mixtures on aerobic 1,4-dioxane biodegradation by Pseudonocardia dioxanivorans CB1190. The established association of these co-occurring compounds suggests important considerations for their respective biodegradation processes. Our kinetics and mechanistic studies demonstrated that individual solvents inhibited biodegradation of 1,4-dioxane in the following order: 1,1-dichloroethene (1,1-DCE) > cis-1,2-diochloroethene (cDCE) > trichloroethene (TCE) > 1,1,1-trichloroethane (TCA). The presence of 5 mg L(-1) 1,1-DCE completely inhibited 1,4-dioxane biodegradation. Subsequently, we determined that 1,1-DCE was the strongest inhibitor of 1,4-dioxane biodegradation by bacterial pure cultures exposed to chlorinated solvent mixtures as well as in environmental samples collected from a site contaminated with chlorinated solvents and 1,4-dioxane. Inhibition of 1,4-dioxane biodegradation rates by chlorinated solvents was attributed to delayed ATP production and down-regulation of both 1,4-dioxane monooxygenase (dxmB) and aldehyde dehydrogenase (aldH) genes. Moreover, increasing concentrations of 1,1-DCE and cis-1,2-DCE to 50 mg L(-1) respectively increased 5.0-fold and 3.5-fold the expression of the uspA gene encoding a universal stress protein. In situ natural attenuation or enhanced biodegradation of 1,4-dioxane is being considered for contaminated groundwater and industrial wastewater, so these results will have implications for selecting 1,4-dioxane bioremediation strategies at sites where chlorinated solvents are present as co-contaminants.
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Affiliation(s)
- Shu Zhang
- Department of Civil and Environmental Engineering, University of California , Los Angeles, California 90095, United States
| | - Phillip B Gedalanga
- Department of Civil and Environmental Engineering, University of California , Los Angeles, California 90095, United States
| | - Shaily Mahendra
- Department of Civil and Environmental Engineering, University of California , Los Angeles, California 90095, United States
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36
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Matsui R, Takagi K, Sakakibara F, Abe T, Shiiba K. Identification and characterization of 1,4-dioxane-degrading microbe separated from surface seawater by the seawater-charcoal perfusion apparatus. Biodegradation 2016; 27:155-63. [PMID: 27094948 DOI: 10.1007/s10532-016-9763-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 04/15/2016] [Indexed: 11/26/2022]
Abstract
To determine the concentration of soluble 1,4-dioxane during biodegradation, a new method using of high-performance liquid chromatography equipped with a hydrophilic interaction chromatography column was developed. The developed method enabled easy and rapid determination of 1,4-dioxane, even in saline medium. Microbes capable of degrading 1,4-dioxane were selected from the seawater samples by the seawater-charcoal perfusion apparatus. Among 32 candidate 1,4-dioxane degraders,, strain RM-31 exhibited the strongest 1,4-dioxane degradation ability. 16S rDNA sequencing and the similarity analysis of strain RM-31 suggested that this organism was most closely related to Pseudonocardia carboxydivorans. This species is similar to Pseudonocardia dioxanivorans, which has previously been reported as a 1,4-dioxane degrader. Strain RM-31 could degrade 300 mg/L within 2 days. As culture incubation times increasing, the residual 1,4-dioxane concentration was decreasing and the total protein contents extracted from growth cells were increasing. The optimum initial pH of the broth medium and incubation temperature for 1,4-dioxane degradation were pH 6-8 and 25 °C. The biodegradation rate of 1,4-dioxane by strain RM-31 at 25 °C in broth medium with 3 % NaCl was almost 20 % faster than that without NaCl. It was probably a first bacteria from the seawater that can exert a strong degrading ability.
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Affiliation(s)
- Ryotaro Matsui
- Division of Life Science and Engineering, Tokyo Denki University, Ishisaka, Hatoyama, Saitama, 350-0394, Japan
| | - Kazuhiro Takagi
- Organochemicals Division, National Institute for Agro-Environmental Sciences, 3-1-3, Kannondai, Tsukuba-Shi, Ibaraki, 305-8604, Japan
| | - Futa Sakakibara
- Organochemicals Division, National Institute for Agro-Environmental Sciences, 3-1-3, Kannondai, Tsukuba-Shi, Ibaraki, 305-8604, Japan
| | - Tomoko Abe
- Division of Life Science and Engineering, Tokyo Denki University, Ishisaka, Hatoyama, Saitama, 350-0394, Japan
| | - Kiwamu Shiiba
- Division of Life Science and Engineering, Tokyo Denki University, Ishisaka, Hatoyama, Saitama, 350-0394, Japan.
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Adamson DT, Anderson RH, Mahendra S, Newell CJ. Evidence of 1,4-dioxane attenuation at groundwater sites contaminated with chlorinated solvents and 1,4-dioxane. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:6510-6518. [PMID: 25970261 DOI: 10.1021/acs.est.5b00964] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
There is a critical need to develop appropriate management strategies for 1,4-dioxane (dioxane) due to its widespread occurrence and perceived recalcitrance at groundwater sites where chlorinated solvents are present. A comprehensive evaluation of California state (GeoTracker) and Air Force monitoring records was used to provide significant evidence of dioxane attenuation at field sites. Temporal changes in the site-wide maximum concentrations were used to estimate source attenuation rates at the GeoTracker sites (median length of monitoring period = 6.8 years). While attenuation could not be established at all sites, statistically significant positive attenuation rates were confirmed at 22 sites. At sites where dioxane and chlorinated solvents were present, the median value of all statistically significant dioxane source attenuation rates (equivalent half-life = 31 months; n = 34) was lower than 1,1,1-trichloroethane (TCA) but similar to 1,1-dichloroethene (1,1-DCE) and trichloroethene (TCE). Dioxane attenuation rates were positively correlated with rates for 1,1-DCE and TCE but not TCA. At this set of sites, there was little evidence that chlorinated solvent remedial efforts (e.g., chemical oxidation, enhanced bioremediation) impacted dioxane attenuation. Attenuation rates based on well-specific records from the Air Force data set confirmed significant dioxane attenuation (131 out of 441 wells) at a similar frequency and extent (median equivalent half-life = 48 months) as observed at the California sites. Linear discriminant analysis established a positive correlation between dioxane attenuation and increasing concentrations of dissolved oxygen, while the same analysis found a negative correlation with metals and CVOC concentrations. The magnitude and prevalence of dioxane attenuation documented here suggest that natural attenuation may be used to manage some but not necessarily all dioxane-impacted sites.
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Affiliation(s)
- David T Adamson
- †GSI Environmental Inc., Houston, Texas 77098, United States
| | - R Hunter Anderson
- ‡Air Force Civil Engineer Center, Lackland Air Force Base, San Antonio, Texas 78236 United States
| | - Shaily Mahendra
- §Department of Civil and Environmental Engineering, University of California, Los Angeles, California 90095, United States
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38
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Izakmehri Z, Ardjmand M, Ganji MD, Babanezhad E, Heydarinasab A. Removal of dioxane pollutants from water by using Al-doped single walled carbon nanotubes. RSC Adv 2015. [DOI: 10.1039/c5ra07611k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The detection and fast enrichment of toxic organic pollutants are challenging issues in the field of environmental science.
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Affiliation(s)
- Z. Izakmehri
- Department of Chemical Engineering
- Science and Research Branch
- Islamic Azad University
- Tehran
- Iran
| | - M. Ardjmand
- Chemical Engineering Department
- Islamic Azad University
- South Tehran Branch
- Tehran
- Iran
| | - M. Darvish Ganji
- Young Researchers and Elite Club
- Central Tehran Branch
- Islamic Azad University
- Tehran
- Iran
| | - E. Babanezhad
- Department of Chemistry
- Qaemshahr Branch
- Islamic Azad University
- Qaemshahr
- Iran
| | - A. Heydarinasab
- Department of Chemical Engineering
- Science and Research Branch
- Islamic Azad University
- Tehran
- Iran
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39
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Lee CS, Le Thanh T, Kim EJ, Gong J, Chang YY, Chang YS. Fabrication of novel oxygen-releasing alginate beads as an efficient oxygen carrier for the enhancement of aerobic bioremediation of 1,4-dioxane contaminated groundwater. BIORESOURCE TECHNOLOGY 2014; 171:59-65. [PMID: 25189509 DOI: 10.1016/j.biortech.2014.08.039] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Revised: 08/06/2014] [Accepted: 08/07/2014] [Indexed: 06/03/2023]
Abstract
Oxygen-releasing alginate beads (ORABs), a new concept of oxygen-releasing compounds (ORCs) designed to overcome some limitations regarding the fast oxygen release rate and the high pH equilibrium of ORCs, were fabricated to promote the stimulation of aerobic biodegradation in anaerobic groundwater. Slow oxygen-releasing rate and maintenance of constant pH were achieved by changing the parameters (ionic radius and valence) related to the cross-linking ions composing ORABs, and the best results were obtained for ORABs cross-linked with Al (Al-ORABs). Furthermore, the mechanism of the improved aerobic biodegradation using Al-ORABs under oxygen-limiting groundwater conditions was elucidated in batch and column studies with 1,4-dioxane and Mycrobacterium sp. PH-06 as a model contaminant and aerobic microbes, respectively. Maximum 1,4-dioxane degradations of 99% and 68.1% were achieved when Al-ORABs were applied in batch and column conditions, respectively, whereas 34.3% and 18% of 1,4-dioxane were degraded without Al-ORABs in batch and column conditions, respectively.
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Affiliation(s)
- Chung-Seop Lee
- School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
| | - Thao Le Thanh
- School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
| | - Eun-Ju Kim
- School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
| | - Jianyu Gong
- School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
| | - Yoon-Young Chang
- Department of Environmental Engineering, Kwangwoon University, Seoul 139-701, Republic of Korea
| | - Yoon-Seok Chang
- School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea.
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Li M, Van Orden ET, DeVries DJ, Xiong Z, Hinchee R, Alvarez PJ. Bench-scale biodegradation tests to assess natural attenuation potential of 1,4-dioxane at three sites in California. Biodegradation 2014; 26:39-50. [DOI: 10.1007/s10532-014-9714-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2014] [Accepted: 09/10/2014] [Indexed: 10/24/2022]
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Pornwongthong P, Mulchandani A, Gedalanga PB, Mahendra S. Transition Metals and Organic Ligands Influence Biodegradation of 1,4-Dioxane. Appl Biochem Biotechnol 2014; 173:291-306. [DOI: 10.1007/s12010-014-0841-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Accepted: 02/27/2014] [Indexed: 10/25/2022]
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Identification of biomarker genes to predict biodegradation of 1,4-dioxane. Appl Environ Microbiol 2014; 80:3209-18. [PMID: 24632253 DOI: 10.1128/aem.04162-13] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Bacterial multicomponent monooxygenase gene targets in Pseudonocardia dioxanivorans CB1190 were evaluated for their use as biomarkers to identify the potential for 1,4-dioxane biodegradation in pure cultures and environmental samples. Our studies using laboratory pure cultures and industrial activated sludge samples suggest that the presence of genes associated with dioxane monooxygenase, propane monooxygenase, alcohol dehydrogenase, and aldehyde dehydrogenase are promising indicators of 1,4-dioxane biotransformation; however, gene abundance was insufficient to predict actual biodegradation. A time course gene expression analysis of dioxane and propane monooxygenases in Pseudonocardia dioxanivorans CB1190 and mixed communities in wastewater samples revealed important associations with the rates of 1,4-dioxane removal. In addition, transcripts of alcohol dehydrogenase and aldehyde dehydrogenase genes were upregulated during biodegradation, although only the aldehyde dehydrogenase was significantly correlated with 1,4-dioxane concentrations. Expression of the propane monooxygenase demonstrated a time-dependent relationship with 1,4-dioxane biodegradation in P. dioxanivorans CB1190, with increased expression occurring after over 50% of the 1,4-dioxane had been removed. While the fraction of P. dioxanivorans CB1190-like bacteria among the total bacterial population significantly increased with decrease in 1,4-dioxane concentrations in wastewater treatment samples undergoing active biodegradation, the abundance and expression of monooxygenase-based biomarkers were better predictors of 1,4-dioxane degradation than taxonomic 16S rRNA genes. This study illustrates that specific bacterial monooxygenase and dehydrogenase gene targets together can serve as effective biomarkers for 1,4-dioxane biodegradation in the environment.
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43
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Patel HA, Yavuz MS, Yavuz CT. Exceptional organic solvent uptake by disulfide-linked polymeric networks. RSC Adv 2014. [DOI: 10.1039/c4ra03355h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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Simonich SM, Sun P, Casteel K, Dyer S, Wernery D, Garber K, Carr G, Federle T. Probabilistic analysis of risks to US drinking water intakes from 1,4-dioxane in domestic wastewater treatment plant effluents. INTEGRATED ENVIRONMENTAL ASSESSMENT AND MANAGEMENT 2013; 9:554-9. [PMID: 23713009 DOI: 10.1002/ieam.1448] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Revised: 04/29/2013] [Accepted: 04/29/2013] [Indexed: 05/21/2023]
Abstract
The risks of 1,4-dioxane (dioxane) concentrations in wastewater treatment plant (WWTP) effluents, receiving primarily domestic wastewater, to downstream drinking water intakes was estimated using distributions of measured dioxane concentrations in effluents from 40 WWTPs and surface water dilution factors of 1323 drinking water intakes across the United States. Effluent samples were spiked with a d8 -1,4-dioxane internal standard in the field immediately after sample collection. Dioxane was extracted with ENVI-CARB-Plus solid phase columns and analyzed by GC/MS/MS, with a limit of quantification of 0.30 μg/L. Measured dioxane concentrations in domestic wastewater effluents ranged from <0.30 to 3.30 μg/L, with a mean concentration of 1.11 ± 0.60 μg/L. Dilution of upstream inputs of effluent were estimated for US drinking water intakes using the iSTREEM model at mean flow conditions, assuming no in-stream loss of dioxane. Dilution factors ranged from 2.6 to 48 113, with a mean of 875. The distributions of dilution factors and dioxane concentration in effluent were then combined using Monte Carlo analysis to estimate dioxane concentrations at drinking water intakes. This analysis showed the probability was negligible (p = 0.0031) that dioxane inputs from upstream WWTPs could result in intake concentrations exceeding the USEPA drinking water advisory concentration of 0.35 μg/L, before any treatment of the water for drinking use.
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Affiliation(s)
- Staci Massey Simonich
- Environmental and Molecular Toxicology, Oregon State University, Corvallis, Oregon, USA; Department of Chemistry, Oregon State University, Corvallis, Oregon, USA
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Li M, Mathieu J, Yang Y, Fiorenza S, Deng Y, He Z, Zhou J, Alvarez PJJ. Widespread distribution of soluble di-iron monooxygenase (SDIMO) genes in Arctic groundwater impacted by 1,4-dioxane. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:9950-9958. [PMID: 23909410 DOI: 10.1021/es402228x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Soluble di-iron monooxygenases (SDIMOs), especially group-5 SDIMOs (i.e., tetrahydrofuran and propane monooxygenases), are of significant interest due to their potential role in the initiation of 1,4-dioxane (dioxane) degradation. Functional gene array (i.e., GeoChip) analysis of Arctic groundwater exposed to dioxane since 1980s revealed that various dioxane-degrading SDIMO genes were widespread, and PCR-DGGE analysis showed that group-5 SDIMOs were present in every tested sample, including background groundwater with no known dioxane exposure history. A group-5 thmA-like gene was enriched (2.4-fold over background, p < 0.05) in source-zone samples with higher dioxane concentrations, suggesting selective pressure by dioxane. Microcosm assays with (14)C-labeled dioxane showed that the highest mineralization capacity (6.4 ± 0.1% (14)CO2 recovery during 15 days, representing over 60% of the amount degraded) corresponded to the source area, which was presumably more acclimated and contained a higher abundance of SDIMO genes. Dioxane mineralization ceased after 7 days and was resumed by adding acetate (0.24 mM) as an auxiliary substrate to replenish NADH, a key coenzyme for the functioning of monoxygenases. Acetylene inactivation tests further corroborated the vital role of monooxygenases in dioxane degradation. This is the first report of the prevalence of oxygenase genes that are likely involved in dioxane degradation and suggests their usefulness as biomarkers of dioxane natural attenuation.
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Affiliation(s)
- Mengyan Li
- Department of Civil and Environmental Engineering, Rice University, Houston, Texas, United States
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Isolation and characterization of bacterial strains that have high ability to degrade 1,4-dioxane as a sole carbon and energy source. Biodegradation 2012; 24:665-74. [PMID: 23239086 DOI: 10.1007/s10532-012-9614-1] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Accepted: 12/04/2012] [Indexed: 10/27/2022]
Abstract
Four novel metabolic 1,4-dioxane degrading bacteria possessing high ability to degrade 1,4-dioxane (designated strains D1, D6, D11 and D17) were isolated from soil in the drainage area of a chemical factory. Strains D6, D11 and D17 were allocated to Gram-positive actinomycetes, similar to previously reported metabolic 1,4-dioxane degrading bacteria, whereas strain D1 was allocated to Gram-negative Afipia sp. The isolated strains could utilize a variety of carbon sources, including cyclic ethers, especially those with carbons at position 2 that were modified with methyl- or carbonyl-groups. The cell yields on 1,4-dioxane were relatively low (0.179-0.223 mg-protein (mg-1,4-dioxane)(-1)), which was likely due to requiring energy for C-O bond fission. The isolated strains showed 2.6-13 times higher specific 1,4-dioxane degradation rates (0.052-0.263 mg-1,4-dioxane (mg-protein)(-1) h(-1)) and 2.3-7.8 fold lower half saturation constants (20.6-69.8 mg L(-1)) than the most effective 1,4-dioxane degrading bacterium reported to date, Pseudonocardia dioxanivorans CB1190, suggesting high activity and affinity toward 1,4-dioxane degradation. Strains D1 and D6 possessed inducible 1,4-dioxane degrading enzymes, whereas strains D11 and D17 possessed constitutive ones. 1,4-Dioxane degradation (100 mg L(-1)) by Afipia sp. D1 was not affected by the co-existence of up to 3,000 mg L(-1) of ethylene glycol. The effects of initial pH, incubation temperature and NaCl concentration on 1,4-dioxane degradation by the four strains revealed that they could degrade 1,4-dioxane under a relatively wide range of conditions, suggesting that they have a certain adaptability and applicability for industrial wastewater treatment.
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Declercq I, Cappuyns V, Duclos Y. Monitored natural attenuation (MNA) of contaminated soils: state of the art in Europe--a critical evaluation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2012; 426:393-405. [PMID: 22513404 DOI: 10.1016/j.scitotenv.2012.03.040] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Revised: 03/03/2012] [Accepted: 03/18/2012] [Indexed: 05/31/2023]
Abstract
The use of natural attenuation (NA) processes for contaminated site cleanup and remediation has been gaining more attention over the last few years. However, the need for an inventory of the existing information concerning monitored natural attenuation (MNA), including the existing return on experience, has been sounding increasingly louder over recent years as well. This paper will focus on the application of MNA throughout Europe. First, a literature study and a survey were performed in order to collect all available data on both qualitative and quantitative aspects of MNA. Secondly, a questionnaire was created and sent out to experts in the field of regulation and research from six countries, including Finland, Spain, and the UK. Thirdly, further contributions from a SNOWMAN workshop concerning MNA (November 7th, 2011, Paris) were included in this paper. The result is a state of the art concerning MNA for several countries, including the legal framework and existing protocols, a comparison between different countries, and an overview of some existing MNA cases throughout Europe combined with a discussion on relevant aspects related to "return on experience". The results demonstrate that MNA is now considered to be a conventional remediation technique in most countries that were included in this study. Although MNA is currently being applied for the remediation of contaminated sites, some countries still don't recognise it as an official remediation technique (e.g. Finland). This study also confirms and illustrates the differences concerning the MNA approach that exists between different countries, as well as the differences in application levels. However, it is important to note that at the same time a certain level of coherence exists concerning the MNA approach, e.g. with regard to the importance of biodegradation processes. Furthermore, the main outcome of this study emphasises the clear need to systematically collect and share information concerning existing MNA cases. Only then a clear return of experience will be possible.
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Affiliation(s)
- I Declercq
- Hogeschool-Universiteit Brussel, Center for Economics and Corporate Sustainability (CEDON), Warmoesberg 26, 1000 Brussels, Belgium
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A New Aluminium Hydroxide Coating on Fused Silica Fiber for the Determination of 1,4-Dioxane in Surfactants and Detergents Using HS-SPME-GC. Chromatographia 2012. [DOI: 10.1007/s10337-012-2213-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Chiang SYD, Mora R, Diguiseppi WH, Davis G, Sublette K, Gedalanga P, Mahendra S. Characterizing the intrinsic bioremediation potential of 1,4-dioxane and trichloroethene using innovative environmental diagnostic tools. ACTA ACUST UNITED AC 2012; 14:2317-26. [DOI: 10.1039/c2em30358b] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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