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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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Carrera G, Vegué L, Boleda MR, Ventura F. Simultaneous determination of the potential carcinogen 1,4-dioxane and malodorous alkyl-1,3-dioxanes and alkyl-1,3-dioxolanes in environmental waters by solid-phase extraction and gas chromatography tandem mass spectrometry. J Chromatogr A 2017; 1487:1-13. [DOI: 10.1016/j.chroma.2017.01.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Revised: 01/03/2017] [Accepted: 01/05/2017] [Indexed: 12/25/2022]
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Favara P, Tunks J, Hatton J, DiGuiseppi W. Sustainable Remediation Considerations for Treatment of 1,4-Dioxane in Groundwater. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/rem.21501] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - John Tunks
- Environment and Nuclear Business Group, CH2M's Site Remediation and Restoration Group, Englewood, Colorado
| | - Jim Hatton
- CH2M's Site Remediation and Restoration Group, Englewood, Colorado
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Gedalanga P, Madison A, Miao Y(R, Richards T, Hatton J, DiGuiseppi WH, Wilson J, Mahendra S. A Multiple Lines of Evidence Framework to Evaluate Intrinsic Biodegradation of 1,4‐Dioxane. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/rem.21499] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Phillip Gedalanga
- Department of Civil and Environmental Engineering, University of California, Los Angeles, California
| | | | | | | | - James Hatton
- CH2M's Site Remediation and Restoration Group, Englewood, Colorado
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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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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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Yan N, Liu F, Chen Y, Brusseau ML. Influence of groundwater constituents on 1,4-dioxane degradation by a binary oxidant system. WATER, AIR, AND SOIL POLLUTION 2016; 227:436. [PMID: 28943674 PMCID: PMC5603204 DOI: 10.1007/s11270-016-3146-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Accepted: 10/31/2016] [Indexed: 05/27/2023]
Abstract
The influence of groundwater on the degradation of 1,4-dioxane (dioxane) by siderite-activated hydrogen peroxide coupled with persulfate was investigated through a series of batch experiments. The degradation of dioxane was considerably slower in groundwater compared to the tests conducted with ultrapure water. Additional tests were conducted to examine potential inhibitory effects of selected ions in isolation. The inhibition effect of anions on dioxane degradation, from strongest inhibition to weakest, was: bicarbonate (HCO3-) > sulfate (SO42-) > chloride (Cl-). The inhibition effect of cations on dioxane degradation, from strongest inhibition to weakest, was: calcium (Ca2+) > potassium (K+) > magnesium (Mg2+). Bicarbonate and calcium ions, which are the most abundant ions in the groundwater used herein, resulted in the greatest decrease in dioxane degradation rate compared to the other constituents. The results of experiments conducted to evaluate their impact over a range of concentrations showed that dioxane degradation was reduced asymptotically with the increase in their concentrations. The results of this study reveal a potential inhibitory effect caused by groundwater constituents during the application of activated binary H2O2-persulfate for in-situ treatment of organic contaminants in groundwater. This effect is attributed to radical scavenging, and its impact should be considered during the evaluation of total oxidant demand (TOD) prior to application.
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Affiliation(s)
- Ni Yan
- Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences, Beijing 100083, P R China
- Hydrology and Atmospheric Sciences Department, School of Earth and Environmental Sciences, University of Arizona, 429 Shantz Building, Tucson, AZ 85721, United States
| | - Fei Liu
- Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences, Beijing 100083, P R China
| | - Yifei Chen
- Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences, Beijing 100083, P R China
| | - Mark L. Brusseau
- Hydrology and Atmospheric Sciences Department, School of Earth and Environmental Sciences, University of Arizona, 429 Shantz Building, Tucson, AZ 85721, United States
- Soil, Water and Environmental Science Department, School of Earth and Environmental Sciences, University of Arizona, 429 Shantz Building, Tucson, AZ 85721, United States
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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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Adamson DT, de Blanc PC, Farhat SK, Newell CJ. Implications of matrix diffusion on 1,4-dioxane persistence at contaminated groundwater sites. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 562:98-107. [PMID: 27096631 DOI: 10.1016/j.scitotenv.2016.03.211] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Revised: 03/29/2016] [Accepted: 03/29/2016] [Indexed: 06/05/2023]
Abstract
Management of groundwater sites impacted by 1,4-dioxane can be challenging due to its migration potential and perceived recalcitrance. This study examined the extent to which 1,4-dioxane's persistence was subject to diffusion of mass into and out of lower-permeability zones relative to co-released chlorinated solvents. Two different release scenarios were evaluated within a two-layer aquifer system using an analytical modeling approach. The first scenario simulated a 1,4-dioxane and 1,1,1-TCA source zone where spent solvent was released. The period when 1,4-dioxane was actively loading the low-permeability layer within the source zone was estimated to be <3years due to its high effective solubility. While this was approximately an order-of-magnitude shorter than the loading period for 1,1,1-TCA, the mass of 1,4-dioxane stored within the low-permeability zone at the end of the simulation period (26kg) was larger than that predicted for 1,1,1-TCA (17kg). Even 80years after release, the aqueous 1,4-dioxane concentration was still several orders-of-magnitude higher than potentially-applicable criteria. Within the downgradient plume, diffusion contributed to higher concentrations and enhanced penetration of 1,4-dioxane into the low-permeability zones relative to 1,1,1-TCA. In the second scenario, elevated 1,4-dioxane concentrations were predicted at a site impacted by migration of a weak source from an upgradient site. Plume cutoff was beneficial because it could be implemented in time to prevent further loading of the low-permeability zone at the downgradient site. Overall, this study documented that 1,4-dioxane within transmissive portions of the source zone is quickly depleted due to characteristics that favor both diffusion-based storage and groundwater transport, leaving little mass to treat using conventional means. Furthermore, the results highlight the differences between 1,4-dioxane and chlorinated solvent source zones, suggesting that back diffusion of 1,4-dioxane mass may be serving as the dominant long-term "secondary source" at many contaminated sites that must be managed using alternative approaches.
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Affiliation(s)
- David T Adamson
- GSI Environmental Inc., 2211 Norfolk, Suite 1000, Houston, TX 77098, United States.
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60
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Simon JA. Editor's Perspective-1,4-Dioxane Remediation Technology Developments. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/rem.21446] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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