Biodegradation of ethylene dibromide (1,2-dibromoethane [EDB]) in microcosms simulating in situ and biostimulated conditions

McKeever, Robert; Sheppard, Diane; Nüsslein, Klaus; Baek, Kwang Hyun; Rieber, Khalil; Ergas, Sarina J.; Forbes, Rose; Hilyard, Mark; Park, Chul

doi:10.1016/j.jhazmat.2011.12.067

Cited by 13 publications

(11 citation statements)

References 13 publications

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“…Enhancements to the aerobic biodegradation rates for EDB in groundwater have been documented following addition of co-metabolic substrates such as methane (McKeever et al 2012), jet fuel (Baek et al 2012) and pentane (Danko et al 2012). It is possible that higher concentrations of hydrocarbons in the vadose zone facilitated co-metabolic biodegradation of EDB that resulted in the higher first-order aerobic biodegradation rate constants observed for LNAPL source.…”

Section: First-order Aqueous Phase Aerobic Biodegradation Rate Constants For Edbmentioning

confidence: 99%

Evaluation of Vapor Intrusion Risk from Ethylene Dibromide Using the Vertical Screening Distance Approach

Kolhatkar¹,

Luo²,

Berns³

et al. 2021

Groundwater Monitoring Rem

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This column reviews the general features of PHT3D Version 2, a reactive multicomponent transport model that couples the geochemical modeling software PHREEQC-2 (Parkhurst and Appelo 1999) with three-dimensional groundwater flow and transport simulators MODFLOW-2000 and MT3DMS (Zheng and Wang 1999). The original version of PHT3D was developed by Henning Prommer and Version 2 by Henning Prommer and Vincent Post (Prommer and Post 2010). More detailed information about PHT3D is available at the website http://www.pht3d.org.The review was conducted separately by two reviewers. This column is presented in two parts.

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Section: First-order Aqueous Phase Aerobic Biodegradation Rate Constants For Edbmentioning

confidence: 99%

Evaluation of Vapor Intrusion Risk from Ethylene Dibromide Using the Vertical Screening Distance Approach

Kolhatkar¹,

Luo²,

Berns³

et al. 2021

Groundwater Monitoring Rem

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“…The EDB biodegradation efficiency under the relevant groundwater conditions in this study was compared with those observed in previous studies under aerobic or anaerobic conditions by a single species or mixed culture (Table 1). As shown, the majority of previous EDB biodegradation studies were conducted under aerobic conditions by indigenous microorganisms or mixed culture, with a few exceptions under anaerobic conditions [2,12,13]. The present study is the first to explore the potential of enhanced EDB biodegradation under a dynamic DO condition, which was often observed in the engineered field applications.…”

Section: Resultsmentioning

confidence: 80%

“…EDB concentrations were analyzed with gas chromatography (GC) spectrometry (Agilent 7820 A) equipped with an auto-sampler [2], a capillary column (DB-624, 30 m × 0.320 mm × 0.25 μm, Agilent, Santa Clara, CA, USA), and an electron capture detector. N 2 was applied as a carrier gas at a constant flow rate of 1 mL/min.…”

Section: Methodsmentioning

confidence: 99%

“…One of the most commonly detected contaminants in groundwater is 1,2-Dibromoethane (EDB), because of its extensive addition to leaded gasoline and soil fumigants several decades ago [1]. EDB is highly toxic and probably carcinogenic in humans, and it can lead to damage to the lungs, liver, kidneys, stomach, reproductive system, respiratory system, and nervous system in mammals [2]. EDB can be characterized by the relative hydrophilia, poor bioavailability, and extremely low natural attenuation rate (t 1/2 = 17.33 years) in groundwater [3].…”

Section: Introductionmentioning

confidence: 99%

“…Enhanced cometabolic degradation by adding co-substrates or nutrients to stimulate pollutant degradation activity has attracted broad attention due to the practicality of the field applications. It was found that cometabolism with phenol [16,17], ethane [16], and methane [2] under aerobic conditions, and lactate [2,18] under anaerobic conditions, could increase the biodegradation rate of EDB. However, it was observed that dissolved oxygen (DO) concentrations in groundwater often change dynamically between aerobic and anaerobic conditions during the engineering applications of enhanced reductive debromination of EDB in the field.…”

Section: Introductionmentioning

confidence: 99%

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Aerobic and Anaerobic Biodegradation of 1,2-Dibromoethane by a Microbial Consortium under Simulated Groundwater Conditions

Wang

Yang

Song

et al. 2019

IJERPH

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This study was conducted to explore the potential for 1,2-Dibromoethane (EDB) biodegradation by an acclimated microbial consortium under simulated dynamic groundwater conditions. The enriched EDB-degrading consortium consisted of anaerobic bacteria Desulfovibrio, facultative anaerobe Chromobacterium, and other potential EDB degraders. The results showed that the biodegradation efficiency of EDB was more than 61% at 15 °C, and the EDB biodegradation can be best described by the apparent pseudo-first-order kinetics. EDB biodegradation occurred at a relatively broad range of initial dissolved oxygen (DO) from 1.2 to 5.1 mg/L, indicating that the microbial consortium had a strong ability to adapt. The addition of 40 mg/L of rhamnolipid and 0.3 mM of sodium lactate increased the biodegradation. A two-phase biodegradation scheme was proposed for the EDB biodegradation in this study: an aerobic biodegradation to carbon dioxide and an anaerobic biodegradation via a two-electron transfer pathway of dihaloelimination. To our knowledge, this is the first study that reported EDB biodegradation by an acclimated consortium under both aerobic and anaerobic conditions, a dynamic DO condition often encountered during enhanced biodegradation of EDB in the field.

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Reductive debromination of bromo‐substituted C2 aliphatics using a biochar–iron(II) composite

Lindhardt

Holm

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND Tribromoethylene (TrBE), dibromoethylenes (DBEs) and 1,2‐dibromoethane (DBA) are widespread, toxic and persistent contaminants found in anaerobic soil and groundwater. The abiotic debromination of TrBE, DBEs and DBA using a layered iron(II)–iron(III) hydroxide (green rust, GR) with biochars acting as electron mediators was studied. A screening of biochar substrates was conducted. Reactive biochars were chosen for debromination of TrBE, DBEs and DBA in deionized water and groundwater. Post‐pyrolysis activation with CO2 was tested for reactivity enhancement. RESULTS Bone meal (BM) and shrimp shell (SS) biochars resulted in 60% and 90% debromination of TrBE, respectively. The SS biochar catalyzed debromination by elimination reactions of TrBE and DBEs resulting in formation of acetylene, while DBA was reduced to ethylene. All debrominations in deionized water followed pseudo‐first‐order kinetics with half‐lives t1/2 of 5.1, 1.3, 2.6 and 9.5 h for TrBE, cDBE, tDBE and DBA, respectively. For similar experiments in moderately hard groundwater, removal t1/2 values were on average 2.6 times slower, but still considered fast. Compared to removal t1/2 in deionized water, post‐pyrolysis activation with CO2 of an acid‐treated SS biochar produced a t1/2 11 times shorter for removal of TrBE and two times shorter for DBA. CONCLUSIONS Biochars are efficient mediators of reductive debromination of TrBE, DBEs and DBA. TrBE, DBEs and DBA can be effectively debrominated in deionized water and groundwater samples using a GR–SS biochar composite. The mediating ability of the SS biochar can be further improved by post‐pyrolysis CO2 activation. © 2022 The Authors. Journal of Chemical Technology and Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry (SCI).

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Biodegradation of ethylene dibromide (1,2-dibromoethane [EDB]) in microcosms simulating in situ and biostimulated conditions

Cited by 13 publications

References 13 publications

Evaluation of Vapor Intrusion Risk from Ethylene Dibromide Using the Vertical Screening Distance Approach

Evaluation of Vapor Intrusion Risk from Ethylene Dibromide Using the Vertical Screening Distance Approach

Aerobic and Anaerobic Biodegradation of 1,2-Dibromoethane by a Microbial Consortium under Simulated Groundwater Conditions

Reductive debromination of bromo‐substituted C2 aliphatics using a biochar–iron(II) composite

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