+ 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

Investigation of mechanisms for the reductive dechlorination of chlorinated ethylenes using electroanalytical techniques



Investigation of mechanisms for the reductive dechlorination of chlorinated ethylenes using electroanalytical techniques



Analyst 126(11): 1901-1906



Chlorinated ethenes in the environment can dechlorinate by accepting electrons from electron donors fortuitously found in nature under a wide range of conditions in the sub-surface by both abiotic and biotic pathways. A source of electron donors is a range of dehalorespiratory bacteria, in which Co(I) in vitamin B12, in the presence of strong reductants such as Ti(III) citrate, aids dehalogenation. In this work we investigated a range of reducing conditions using electron donors of varying strengths and proposed mechanisms for dechlorination. Initially, the reducing abilities of one of the strongest electron donors known, tetrakis(dimethylamino)ethylene (TDAE), was studied. Subsequently, the reducing ability of a cobalt salt under reducing conditions was examined. Molasses was used as a source of hydrogen. The reactions were followed using electrochemistry, UV-Vis spectroscopy and ion chromatography. TDAE was found to form adducts with tetrachloroethylene and trans-dichloroethylene and to reduce trichloroethylene and cis-dichloroethylene very rapidly. On application of a negative potential, cobalt, in the presence of molasses, was also found to dechlorinate trichloroethylene rapidly. Dechlorination of PCE was considerably slower.

Please choose payment method:






(PDF emailed within 1 workday: $29.90)

Accession: 046464471

Download citation: RISBibTeXText

PMID: 11763064


Related references

Abiotic reductive dechlorination of chlorinated ethylenes by soil. Chemosphere 55(5): 705-713, 2004

Abiotic reductive dechlorination of chlorinated ethylenes by iron-bearing phyllosilicates. Chemosphere 56(10): 999-1009, 2004

Kinetics and inhibition of reductive dechlorination of chlorinated ethylenes by two different mixed cultures. Environmental Science & Technology 39(1): 195-205, 2005

Effect of palladium on the reductive dechlorination of chlorinated ethylenes with nanoscale Pd/Fe particles. Water Science and Technology: Water Supply 4(5/6): 297-303, 2004

Aqueous reductive dechlorination of chlorinated ethylenes with tetrakis(4-carboxyphenyl)porphyrin cobalt. Inorganic Chemistry 44(13): 4852-4861, 2005

Abiotic reductive dechlorination of chlorinated ethylenes by iron-bearing soil minerals. 2. Green rust. Environmental Science and Technology 36(24): 5348-5354, 2002

Abiotic Reductive Dechlorination of Chlorinated Ethylenes by Iron-Bearing Soil Minerals. 1. Pyrite and Magnetite. Environmental Science and Technology 36(23): 47-54, 2002

Abiotic Reductive Dechlorination of Chlorinated Ethylenes by Iron-Bearing Soil Minerals. 2. Green Rust. Environmental Science and Technology 36(24): 48-54, 2002

Abiotic reductive dechlorination of chlorinated ethylenes by iron-bearing soil minerals. 1. Pyrite and magnetite. Environmental Science and Technology 36(23): 5147-5154, 2002

Batch reactor kinetic studies on the reductive dechlorination of chlorinated ethylenes by tetrakis-(4-sulfonatophenyl)porphyrin cobalt. Chemosphere 82(4): 592-596, 2011

Abiotic reductive dechlorination of chlorinated ethylenes by iron bearing soil minerals and potential interactions with biotic processes. Abstracts of Papers American Chemical Society 220(Part 1): ENVR 95, 2000

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

Vegetable oil delivery techniques for use as a carbon source in the reductive dechlorination of chlorinated solvents in saturated porous media. Abstracts with Programs - Geological Society of America 34(6): 189, 2002

Dechlorination of chlorinated ethylenes by a photochemically generated iron(0) complex. Dalton Transactions 42(28): 10121-8, 2013

Reductive dechlorination of chlorinated hydrocarbons as non-aqueous phase liquid (NAPL): preliminary investigation on effects of cement doses. Science of the Total Environment 430: 82-87, 2012