Dechlorination of trichloroethylene (TCE) using zero-valent iron in organic solvents

Rita E. Cook; Kristen A. Thoreson; Kristopher McNeill

Dechlorination of trichloroethylene (TCE) using zero-valent iron in organic solvents

Rita E. Cook, Kristen A. Thoreson, Kristopher McNeill

Chemistry (Twin Cities)

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Zero-valent iron (ZVI) is currently employed to remediate ground water contaminated with TCE, however the mechanism of the dechlorination reaction is not well understood. In order to compare the mechanism of ZVI-mediated dechlorination to that of a well characterized phosphino-iron(0) model complex, dechlorination of TCE with ZVI was studied in organic solvents. The reaction was carried out with 100 mesh iron(0) in oxygen and water-free conditions using THF and toluene as solvents. TCE loss was monitored by GC/MS. The reaction in water-free THF resulted in complete degradation of TCE after several days, but only a 10% decrease in TCE concentration was observed in water-free toluene over the same timescale. The dechlorination reaction in water-free toluene with tert-butanol as a proton source was also evaluated.

Original language	English (US)
Title of host publication	American Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers
State	Published - Dec 1 2009
Event	237th National Meeting and Exposition of the American Chemical Society, ACS 2009 - Salt Lake City, UT, United States Duration: Mar 22 2009 → Mar 26 2009

Other

Other	237th National Meeting and Exposition of the American Chemical Society, ACS 2009
Country/Territory	United States
City	Salt Lake City, UT
Period	3/22/09 → 3/26/09

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title = "Dechlorination of trichloroethylene (TCE) using zero-valent iron in organic solvents",

abstract = "Zero-valent iron (ZVI) is currently employed to remediate ground water contaminated with TCE, however the mechanism of the dechlorination reaction is not well understood. In order to compare the mechanism of ZVI-mediated dechlorination to that of a well characterized phosphino-iron(0) model complex, dechlorination of TCE with ZVI was studied in organic solvents. The reaction was carried out with 100 mesh iron(0) in oxygen and water-free conditions using THF and toluene as solvents. TCE loss was monitored by GC/MS. The reaction in water-free THF resulted in complete degradation of TCE after several days, but only a 10% decrease in TCE concentration was observed in water-free toluene over the same timescale. The dechlorination reaction in water-free toluene with tert-butanol as a proton source was also evaluated.",

author = "Cook, {Rita E.} and Thoreson, {Kristen A.} and Kristopher McNeill",

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AU - Cook, Rita E.

AU - Thoreson, Kristen A.

AU - McNeill, Kristopher

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Y1 - 2009/12/1

N2 - Zero-valent iron (ZVI) is currently employed to remediate ground water contaminated with TCE, however the mechanism of the dechlorination reaction is not well understood. In order to compare the mechanism of ZVI-mediated dechlorination to that of a well characterized phosphino-iron(0) model complex, dechlorination of TCE with ZVI was studied in organic solvents. The reaction was carried out with 100 mesh iron(0) in oxygen and water-free conditions using THF and toluene as solvents. TCE loss was monitored by GC/MS. The reaction in water-free THF resulted in complete degradation of TCE after several days, but only a 10% decrease in TCE concentration was observed in water-free toluene over the same timescale. The dechlorination reaction in water-free toluene with tert-butanol as a proton source was also evaluated.

AB - Zero-valent iron (ZVI) is currently employed to remediate ground water contaminated with TCE, however the mechanism of the dechlorination reaction is not well understood. In order to compare the mechanism of ZVI-mediated dechlorination to that of a well characterized phosphino-iron(0) model complex, dechlorination of TCE with ZVI was studied in organic solvents. The reaction was carried out with 100 mesh iron(0) in oxygen and water-free conditions using THF and toluene as solvents. TCE loss was monitored by GC/MS. The reaction in water-free THF resulted in complete degradation of TCE after several days, but only a 10% decrease in TCE concentration was observed in water-free toluene over the same timescale. The dechlorination reaction in water-free toluene with tert-butanol as a proton source was also evaluated.

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ER -

Dechlorination of trichloroethylene (TCE) using zero-valent iron in organic solvents

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