Reductive Dehalogenation of Chlorinated Ethenes with Elemental Iron: The Role of Microorganisms

Lampron, Kyle J.; Chiu, Pei-Chun; K., Devika Raj

doi:10.1016/s0043-1354(01)00017-3

Cited by 54 publications

(29 citation statements)

References 19 publications

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“…71 In this way, higher chlorinated ethenes such as PCE and TCE can be sequentially dechlorinated to DCE, VC, and ethene. The reductive transformation of chlorinated ethenes is a process of stepwise depletions because higher chlorinated ethenes are the preferential substrate.…”

Section: Bioremediationmentioning

confidence: 99%

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Effect of Nanoscale Zero-Valent Iron Treatment on Biological Reductive Dechlorination: A Review of Current Understanding and Research Needs

Bruton

Pycke

Halden

2015

Critical Reviews in Environmental Science and Technology

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Nanoscale zero-valent iron (nZVI) is a strong non-specific reducing agent that is used for in situ degradation of chlorinated solvents and other oxidized pollutants. However, there are significant concerns regarding risks posed by the deliberate release of engineered nanomaterials 20 into the environment, which have triggered moratoria, for example, in the United Kingdom. This critical review focuses on the effect of nZVI injection on subsurface microbial communities, which are of concern due to their important role in contaminant attenuation processes.Corrosion of ZVI stimulates dehalorespiring bacteria, due to the production of H 2 that can serve as an electron donor for reduction of chlorinated contaminants. Conversely, lab studies show 25 that nZVI can be inhibitory to pure bacterial cultures, although toxicity is reduced when nZVI is coated with polyelectrolytes or natural organic matter. The emerging toolkit of molecular biological analyses should enable a more sophisticated assessment of combined nZVI/biostimulation or bioaugmentation approaches. While further research on the consequences of its application for subsurface microbial communities is needed, nZVI continues 30 to hold promise as an innovative technology for in situ remediation of pollutants. It is particularly attractive for the remediation of subsurface environments containing chlorinated ethenes because of its ability to potentially elicit and sustain both physical-chemical and biological removal despite its documented antimicrobial properties.

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Section: Bioremediationmentioning

confidence: 99%

“…71 Biologically mediated mineral precipitation 35 or excessive biomass growth could reduce the porosity of the barrier and thus its hydraulic conductivity, thereby causing groundwater to circumvent the treatment zone. 295…”

Section: Prb-microbial Interaction As Experience With Granular Iron mentioning

confidence: 99%

Effect of Nanoscale Zero-Valent Iron Treatment on Biological Reductive Dechlorination: A Review of Current Understanding and Research Needs

Bruton

Pycke

Halden

2015

Critical Reviews in Environmental Science and Technology

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“…The hydrogen generated from the anaerobic corrosion of ZVI can therefore create an environment amenable to the growth of dechlorinating bacteria. The stimulation of dechlorinating bacteria for the treatment of chlorinated ethenes in the presence of ZVI has been observed in the laboratory (Lampron et al, 2001;Rosenthal et al, 2003) and in the field (Zemb et al, 2010). Although the Dhb population was not analyzed previously at the site, there is evidence suggesting that the Dhb populations and biological reduction activity have been stimulated by the ZVI injection.…”

Section: Evidence For Biological Activitymentioning

confidence: 99%

Chemical and Biological Reduction of PCE by Pneumatic Fracturing and Injection of ZVI in Saprolite

Lee¹,

Abrams²,

Moskal³

et al. 2013

Remediation Journal

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“…Several studies have been published on the combination of both methods [24][25][26][27][28], which leads to an increase the effectiveness of remediation and elimination of the negatives of the individual methods. The aim of this study is to compare the effectiveness and costs of the method combined lactate and nZVI with individual methods on a site contaminated with chlorinated ethenes.…”

Section: Introductionmentioning

confidence: 99%

In-Situ Combination of Bio and Abio Remediation of Chlorinated Ethenes

Lacinová¹,

Černíková²,

Hrabal³

et al. 2013

Ecological Chemistry and Engineering S

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This article deals with combined abio-bioreductive methods for in-situ removal of chlorinated ethenes. The method is based on the use of bioremediation supported by lactate and chemical reduction using nZVI. The method is compared with the use of the individual methods alone, mainly with nZVI. In an environment with very low permeability a poor contaminant removal efficiency was achieved during repeated application of nZVI (about 50% of the original content of contamination). Separate application of lactate resulted in conversion of PCE to 1,2-cis-DCE, whose degradation occurred very slowly. When using the combined abio-bioreductive method, based on consecutive application of lactates and nZVI, over 75% of the original content of contamination was removed. This article discusses not only the changes in concentrations of contaminants but also pH and ORP. Both methods are also compared from an economic point of view.

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Reductive Dehalogenation of Chlorinated Ethenes with Elemental Iron: The Role of Microorganisms

Cited by 54 publications

References 19 publications

Effect of Nanoscale Zero-Valent Iron Treatment on Biological Reductive Dechlorination: A Review of Current Understanding and Research Needs

Effect of Nanoscale Zero-Valent Iron Treatment on Biological Reductive Dechlorination: A Review of Current Understanding and Research Needs

Chemical and Biological Reduction of PCE by Pneumatic Fracturing and Injection of ZVI in Saprolite

In-Situ Combination of Bio and Abio Remediation of Chlorinated Ethenes

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