Impact of iron sulfide transformation on trichloroethylene degradation

He, Yurong; Wilson, John T.; Wilkin, Richard T.

doi:10.1016/j.gca.2010.01.013

Cited by 93 publications

(83 citation statements)

References 88 publications

(160 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The weak and broad peak at 20° suggest that iron sulfides have started to form (Jeong et al, 2008, Csakberenyi-Malasics et al, 2012, Fan et al, 2013 shortly (within 30 minutes) after injection of dithionite to the nZVI. It is expected that the amorphous phase of mackinawite (also known as disordered mackinawite or amorphous iron(II) monosulfide, FeS am ) will form first since it is the first iron sulfide formed through the reaction of Fe 2+ and S 2- (He et al, 2010b). Xie and Cwiertny (2010) treated a partially oxidized nZVI sample with dithionite for 24 hours and even though a fully crystalline phase of iron sulfide was not present, a major diffraction line attributed to mackinawite was observed.…”

Section: Characterization Of Iron Nanoparticlesmentioning

confidence: 99%

Enhanced Dechlorination of 1,2-Dichloroethane by Coupled Nano Iron-Dithionite Treatment

Garcia

Boparai

O'Carroll

2016

Environ. Sci. Technol.

View full text Add to dashboard Cite

1,2-dichloroethane (1,2-DCA) is a chlorinated solvent classified as a probable human carcinogen. Due to its extensive industrial applications, widespread contamination and recalcitrance towards abiotic dechlorination, 1,2-DCA remains a challenging compound for the remediation community and one of the great research interests. Batch experiments combining bimetallic or monometallic nZVI (stabilized or non-stabilized) with sodium dithionite were conducted for the degradation of 1,2-DCA. These experiments have yielded up to 92 % degradation of the initial 1,2-DCA concentration over the course of a year. Observed pseudo-first order rate constants (k obs ) range from 3.8 x 10 -3 to 7.8 x 10 -3 day -1 . Degradation was also achieved using magnetite and iron sulfide as the metal surface, with kobs values of 6.2 x 10 -3 and 4.7 x 10 -3 day -1 , respectively. Characterization analysis of the nZVI/dithionite nanoparticles shows that zero valent iron as such remains in solution after more than one year of reactivity and that iron sulfide is formed in solution. This novel treatment represents the first nZVI-based formulation to achieve nearly complete degradation of 1,2-DCA.

show abstract

Section: Characterization Of Iron Nanoparticlesmentioning

confidence: 99%

Enhanced Dechlorination of 1,2-Dichloroethane by Coupled Nano Iron-Dithionite Treatment

Garcia

Boparai

O'Carroll

2016

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…More importantly, prior studies have reported the capacity of FeS to reductively dehalogenate a range of chlorinated organic pollutants such as g-hexachlorocyclohexane, carbon tetrachloride, hexachloroethane, and trichloroethylene (Butler and Hayes, 1998;He et al, 2010;Liu et al, 2003). It is intuitive that FeS may play an important role in abiotic reductive dehalogenation of many BFRs in anoxic sediments.…”

Section: Introductionmentioning

confidence: 99%

Reductive transformation of hexabromocyclododecane (HBCD) by FeS

Peng

et al. 2016

Water Research

View full text Add to dashboard Cite

“…Dhc containing the gene tceA have been found to respire TCE and cis-DCE (Seshadri et al, 2005) whereas Dhc with the genes vcrA or bvcA respire cis-DCE and vinyl chloride (VC) (Muller et al, 2004;Sung et al, 2006). Several recent laboratory studies have also suggested that abiotic degradation pathways for chlorinated ethenes are of importance in the presence of iron minerals (Darlington et al, 2008;Ferrey et al, 2004;He et al, 2008He et al, , 2010Jeong et al, 2011;Lollar et al, 2010). Biotic and abiotic degradations of chlorinated ethenes and ethanes have been documented by compound specific isotope analysis (CSIA) in several studies (for chlorinated ethenes e.g.…”

Section: Introductionmentioning

confidence: 99%

Identification of chlorinated solvents degradation zones in clay till by high resolution chemical, microbial and compound specific isotope analysis

Damgaard

Bjerg

Bælum

et al. 2013

Journal of Contaminant Hydrology

View full text Add to dashboard Cite

a b s t r a c tThe degradation of chlorinated ethenes and ethanes in clay till was investigated at a contaminated site (Vadsby, Denmark) by high resolution sampling of intact cores combined with groundwater sampling. Over decades of contamination, bioactive zones with degradation of trichloroethene (TCE) and 1,1,1-trichloroethane (1,1,1-TCA) to 1,2-cis-dichloroethene (cis-DCE) and 1,1-dichloroethane, respectively, had developed in most of the clay till matrix. Dehalobacter dominated over Dehalococcoides (Dhc) in the clay till matrix corresponding with stagnation of sequential dechlorination at cis-DCE. Sporadically distributed bioactive zones with partial degradation to ethene were identified in the clay till matrix (thickness from 0.10 to 0.22 m). In one sub-section profile the presence of Dhc with the vcrA gene supported the occurrence of degradation of cis-DCE and VC, and in another enriched δ 13 C for TCE, cis-DCE and VC documented degradation. Highly enriched δ 13 C for 1,1,1-TCA (25‰) and cis-DCE (−4‰) suggested the occurrence of abiotic degradation in a third sub-section profile. Due to fine scale heterogeneity the identification of active degradation zones in the clay till matrix depended on high resolution subsampling of the clay till cores. The study demonstrates that an integrated approach combining chemical analysis, molecular microbial tools and compound specific isotope analysis (CSIA) was required in order to document biotic and abiotic degradations in the clay till system.

show abstract

Impact of iron sulfide transformation on trichloroethylene degradation

Cited by 93 publications

References 88 publications

Enhanced Dechlorination of 1,2-Dichloroethane by Coupled Nano Iron-Dithionite Treatment

Enhanced Dechlorination of 1,2-Dichloroethane by Coupled Nano Iron-Dithionite Treatment

Reductive transformation of hexabromocyclododecane (HBCD) by FeS

Identification of chlorinated solvents degradation zones in clay till by high resolution chemical, microbial and compound specific isotope analysis

Contact Info

Product

Resources

About