Enhanced reductive degradation of carbon tetrachloride by biogenic vivianite and Fe(II)

Bae, Sungjun; Lee, Woojin

doi:10.1016/j.gca.2012.02.023

Cited by 44 publications

(24 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3N HCl extractable Fe(II) in the IBSM suspensions with CN32 during the reductive degradation of TNT increased in 58 h. Magnetite and green rust, which showed high kinetic constants (0.0039 and 0.0022 h -1 , respectively), exhibited high Fe(II) productions (0.068 and 0.073 mM, respectively) among studied IBSMs. Magnetite and green rust containing Fe(II) in their structures are more easily reduced by CN32 than Fe(II) deficient IBSMs (Bae and Lee 2012). Lepidocrocite, goethite, and hematite showed that relatively lower amount of Fe(II) (0.02-0.043 mM) was reduced by CN32.…”

Section: Enhanced Degradation Of Tnt By Interaction Of Reactivity Remmentioning

confidence: 95%

Enhanced Degradation of TNT and RDX by Bio-reduced Iron Bearing Soil Minerals

Cho¹,

Bae²,

Lee³

2012

Advances in environmental research

Self Cite

View full text Add to dashboard Cite

We demonstrated that reductive degradation of 2,4,6-Trinitrotoluene (TNT) and hexahydro-1,3,5-trinitro-1,3,5-triazine (Royal Demolition Explosive, RDX) can be enhanced by bio-reduced ironbearing soil minerals (IBSMs) using Shewanella putrefaciens CN32 (CN32). The degradation kinetic rate constant of TNT by bio-reduced magnetite was the highest (0.0039 h-1), followed by green rust (0.0022 h-1), goethite (0.0017 h-1), lepidocrocite (0.0016 h-1), and hematite (0.0006 h-1). The highest rate constant was obtained by bio-reduced lepidocrocite (0.1811 h-1) during RDX degradation, followed by magnetite (0.1700 h-1), green rust (0.0757 h-1), hematite (0.0495 h-1), and goethite (0.0394 h-1). Significant increase of Fe(II) was observed during the reductive degradation of TNT and RDX by bio-reduced IBSMs. X-ray diffraction and electron microscope analyses were conducted for identification of degradation mechanism of TNT and RDX in this study. 4-amino-dinitrotoluene were detected as products during TNT degradation,

show abstract

Section: Enhanced Degradation Of Tnt By Interaction Of Reactivity Remmentioning

confidence: 95%

Enhanced Degradation of TNT and RDX by Bio-reduced Iron Bearing Soil Minerals

Cho¹,

Bae²,

Lee³

2012

Advances in environmental research

Self Cite

View full text Add to dashboard Cite

show abstract

“…As a result, abiotic reductive dechlorination by minerals has attracted considerable attention within the research community (e.g., Butler and Hayes ; Elsner et al ; Han et al ; Jeong and Hayes , ; Jeong et al ; Tratnyek et al ). Abiotic transformation of carbon tetrachloride (CT), trichloroethane (TCA), TCE, and PCE has been investigated by a number of research groups using reactive iron minerals such as pyrite, troilite, mackinawite (Butler and Hayes ; Choi et al ; Hansson et al ; Lee and Batchelor , ; Kim et al ), vivianite (Bae and Lee ), magnetite (Lee and Batchelor ), and green rusts (Ayala‐Luis et al ; Lee and Batchelor ; Liang and Butler ; O'Loughlin et al ). Additionally, several field‐related studies have provided evidence that reactive iron minerals, such as iron sulfides and magnetite, may have important contributions to the degradation of chlorinated solvents in natural and engineered systems (Butler et al ; Darlington et al , ; Davis et al ; Devlin and Muller ; Ferrey et al ; Kennedy et al ; Kenneke and Weber 2003; Shen and Wilson ).…”

Section: Introductionmentioning

confidence: 99%

Review of Abiotic Degradation of Chlorinated Solvents by Reactive Iron Minerals in Aquifers

He¹,

Wilson²,

Su³

et al. 2015

Groundwater Monitoring Rem

117

121

View full text Add to dashboard Cite

Abiotic degradation of chlorinated solvents by reactive iron minerals such as iron sulfides, magnetite, green rust, and other Fe(II)‐containing minerals has been observed in both laboratory and field studies. These reactive iron minerals form under iron‐ and sulfate‐reducing conditions which are commonly found in permeable reactive barriers (PRBs), enhanced reductive dechlorination (ERD) treatment locations, landfills, and aquifers that are chemically reducing. The objective of this review is to synthesize current understanding of abiotic degradation of chlorinated solvents by reactive iron minerals, with special focus on how abiotic processes relate to groundwater remediation. Degradation of chlorinated solvents by reactive minerals can proceed through reductive elimination, hydrogenolysis, dehydrohalogenation, and hydrolysis reactions. Degradation products of abiotic reactions depend on degradation pathways and parent compounds. Some degradation products (e.g., acetylene) have the potential to serve as a signature product for demonstrating abiotic reactions. Laboratory and field studies show that various minerals have a range of reactivity toward chlorinated solvents. A general trend of mineral reactivity for degradation of chlorinated solvents can be approximated as follows: disordered FeS > FeS > Fe(0) > FeS2 > sorbed Fe2+ > green rust = magnetite > biotite = vermiculite. Reaction kinetics are also influenced by factors such as pH, natural organic matter (NOM), coexisting metal ions, and sulfide concentration in the system. In practice, abiotic reactions can be engineered to stimulate reactive mineral formation for groundwater remediation. Under appropriate site geochemical conditions, abiotic reactions can occur naturally, and can be incorporated into remedial strategies such as monitored natural attenuation.

show abstract

“…Firstly, the released Fe 2+ /Fe 3+ redox couple on the surface of iron oxides could act as the efficient electron mediators, were likely to be capable of accelerating EET (Bae and Lee, 2012). Similar result was also obtained by Wu et al (2010), where anaerobic transformation of 2,4-dichlorophenoxyacetic acid by an iron-reducing bacterium Comamonas koreensis CY01 could be enhanced by Fe (III).…”

Section: Resultsmentioning

confidence: 99%

“…What’s more important, the presence of hematite and magnetite facilitated electric syntrophy among microorganism, which is also helpful for both reductive dechlorination and methanogenesis (Baek et al, 2016). The efficient reduction of p -CP in the anaerobic system coupled by hematite and magnetite would result in a significant improvement of biodegradability and reduction of toxicity (Bae and Lee, 2012). The release of Fe 2+ and total Fe within 25 h in the anaerobic system coupled by hematite and magnetite was generally below 3 mg/L ( Figure 5 ), suggesting the slow dissolution rate of hematite and magnetite.…”

Section: Resultsmentioning

confidence: 99%

Promotion of Para-Chlorophenol Reduction and Extracellular Electron Transfer in an Anaerobic System at the Presence of Iron-Oxides

et al. 2018

View full text Add to dashboard Cite

Anaerobic dechlorination of chlorophenols often subjects to their toxicity and recalcitrance, presenting low loading rate and poor degradation efficiency. In this study, in order to accelerate p-chlorophenol (p-CP) reduction and extracellular electron transfer in an anaerobic system, three iron-oxide nanoparticles, namely hematite, magnetite and ferrihydrite, were coupled into an anaerobic system, with the performance and underlying role of iron-oxide nanoparticles elucidated. The reductive dechlorination of p-CP was notably improved in the anaerobic systems coupled by hematite and magnetite, although ferrihydrite did not plays a positive role. Enhanced dechlorination of p-CP in hematite or magnetite coupled anaerobic system was linked to the obvious accumulation of acetate, lower oxidation–reduction potential and pH, which were beneficial for reductive dechlorination. Electron transfer could be enhanced by Fe2+/Fe3+ redox couple on the iron oxides surface formed through dissimilatory iron-reduction. This study demonstrated that the coupling of iron-oxide nanoparticles such as hematite and magnetite could be a promising alternative to the conventional anaerobic reduction process for the removal of CPs from wastewater.

show abstract

Enhanced reductive degradation of carbon tetrachloride by biogenic vivianite and Fe(II)

Cited by 44 publications

References 64 publications

Enhanced Degradation of TNT and RDX by Bio-reduced Iron Bearing Soil Minerals

Enhanced Degradation of TNT and RDX by Bio-reduced Iron Bearing Soil Minerals

Review of Abiotic Degradation of Chlorinated Solvents by Reactive Iron Minerals in Aquifers

Promotion of Para-Chlorophenol Reduction and Extracellular Electron Transfer in an Anaerobic System at the Presence of Iron-Oxides

Contact Info

Product

Resources

About