+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Reductive dehalogenation of chlorinated methanes by iron metal



Reductive dehalogenation of chlorinated methanes by iron metal



Environmental Science and Technology 28(12): 2045-2053



Reduction of chlorinated solvents by fine-grained iron metal was studied in well-mixed anaerobic batch systems in order to help assess the utility of this reaction in remediation of contaminated groundwater. Iron sequentially dehalogenates carbon tetrachloride via chloroform to methylene chloride. The initial rate of each reaction step was pseudo-first-order in substrate and became substantially slower with each dehalogenation step. Thus, carbon tetrachloride degradation typically occurred in several hours, but no significant reduction of methylene chloride was observed over 1 month. Trichloroethene (TCE) was also dechlorinated by iron, although more slowly than carbon tetrachloride. Increasing the clean surface area of iron greatly increased the rate of carbon tetrachloride dehalogenation, whereas increasing pH decreased the reduction rate slightly. The reduction of chlorinated methanes in batch model systems appears to be coupled with oxidative dissolution (corrosion) of the iron through a largely diffusion-limited surface reaction.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 009315053

Download citation: RISBibTeXText

PMID: 22191743

DOI: 10.1021/es00061a012


Related references

Reductive dechlorination of chlorinated methanes and ethanes by reduced iron (II) porphyrins. Chemosphere 13(3): 391-402, 1984

Reductive dehalogenation of chlorinated organic compounds using zero-valent iron. Ground Water: , Pages 830. 1993., 1993

Isotopic fractionation during reductive dehalogenation of chlorinated ethenes by metallic iron. Abstracts with Programs - Geological Society of America 29(6): 185, 1997

Reductive dehalogenation of chlorinated ethenes with elemental iron: The role of microorganisms. Water Research 35(13): 3077-3084, 2001

Carbon isotopic fractionation during reductive dehalogenation of chlorinated ethenes by metallic iron. Organic Geochemistry 30(8-part-P1): 0-763, 1999

Theoretical investigations into the intermediacy of chlorinated vinylcobalamins in the reductive dehalogenation of chlorinated ethylenes. Journal of the American Chemical Society 127(1): 384-396, 2005

Genomic and Transcriptomic Analysis of Growth-Supporting Dehalogenation of Chlorinated Methanes in Methylobacterium. Frontiers in Microbiology 8: 1600, 2017

Occurrence ofDehalococcoidesand Reductive Dehalogenase Genes in Microcosms, a Constructed Wetland and Groundwater from a Chlorinated Ethene Contaminated Field Site as Indicators for In Situ Reductive Dehalogenation. Water, Air and Soil Pollution 224(11): 1768-281, 2013

Reductive dechlorination of chlorinated ethenes by iron metal. Abstracts of Papers American Chemical Society 209(1-2): ENVR 128, 1995

Reductive dechlorination of chlorinated methanes in cement slurries containing Fe(II). Chemosphere 48(10): 1019-1027, 2002

Anaerobic Microbial Reductive Dehalogenation of Chlorinated Ethenes. Bioremediation Journal 3(3): 151-169, 1999

Reductive dehalogenation of chlorinated dioxins by an anaerobic bacterium. Nature 421: 7-60, 2003

Reductive dehalogenation of chlorinated c 1 hydrocarbons mediated by corrinoids. Biochemistry 28(11): 4908-4914, 1989

Pilot-scale demonstration of reductive dechlorination of chlorinated ethenes by iron metal. Abstracts of Papers American Chemical Society 209(1-2): ENVR 249, 1995

Reductive dehalogenation of chlorinated benzenes and toluenes under methanogenic conditions. Applied and Environmental Microbiology 59(10): 3266-3272, 1993