Reaction mechanisms involved in reduction of halogenated hydrocarbons using sulfated iron

Conference · Fri Dec 01 04:00:00 EST 1995

OSTI ID:126361

Hassan, S M; Cipollone, M G ^[1]; Wolfe, N L ^[2]

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1. Technology Applications, Inc., Athens, GA (United States)
2. Environmental Research Lab., Athens, GA (United States)

Experiments were carried out to investigate the mechanisms and pathways involved in the reduction of halogenated hydrocarbons represented by trichloroethylene (TCE) and tetrachloroethylene (PCE) with sulfated iron aqueous media. Results suggested that iron sulfide acted as the dehalogenation center. Zero-valent iron acted as a generator for molecular hydrogen through its reaction with water. Results of experiments in which iron sulfide was replaced by other transition metal sulfides and experiments in which zero-valent iron was replaced by other sources of molecular hydrogen will be reported. The main reduction product of chloroethylene derivatives was ethyne which under the catalytic reaction of zero-valent iron was reduced further to ethene and finally to ethane. Intermediate products were identified using GC-MS. Mechanisms and pathways will be presented.

• OSTI ID: 126361
• Report Number(s): CONF-950402--
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
54 ENVIRONMENTAL SCIENCES
CHEMICAL REACTIONS
CHLORINATED ALIPHATIC HYDROCARBONS
DECHLORINATION
DEHALOGENATION
ETHANE
GROUND WATER
IRON
IRON SULFIDES
REACTION INTERMEDIATES
REDUCTION
REMEDIAL ACTION