Reduction of halogenated ethanes by green rust.

Journal Article · Thu Jan 01 04:00:00 EST 2004 · Environ. Toxicol. Chem.

DOI:https://doi.org/10.1897/03-45· OSTI ID:961215

O'Loughlin, E J; Burris, D R

Green rusts, mixed Fe{sup II}/Fe{sup III} hydroxide minerals present in many suboxic environments, have been shown to reduce a number of organic and inorganic contaminants. The reduction of halogenated ethanes was examined in aqueous suspensions of green rust, both alone and with the addition of Ag{sup I} (AgGR) and Cu{sup II} (CuGR). Hexachloroethane (HCA), pentachloroethane (PCA), 1,1,1,2-tetrachloroethane (1,1,1,2-TeCA), 1,1,2,2-tetrachloroethane (1,1,2,2-TeCA), 1,1,1-trichloroethane (1,1,1-TCA), 1,1,2-trichloroethane (1,1,2-TCA), 1,1-dichloroethane (1,1-DCA), and 1,2-dibromoethane were reduced in the presence of green rust alone, AgGR, or CuGR; only 1,2-dichloroethane and chloroethane were nonreactive. The reduction was generally more rapid for more highly substituted ethanes than for ethanes having fewer halogen groups (HCA > PCA > 1,1,1,2-TeCA > 1,1,1-TCA > 1,1,2,2-TeCA > 1,1,2-TCA > 1,1-DCA), and isomers with the more asymmetric distributions of halogen groups were more rapidly reduced than the isomer with greater symmetry (e.g., 1,1,1-TCA > 1,1,2-TCA). The addition of Ag{sup I} or Cu{sup II} to green rust suspensions resulted in a substantial increase in the rate of halogenated ethane reduction as well as significant differences in the product distributions with respect to green rust alone.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC; DOD
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 961215
• Report Number(s): ANL/ER/JA-45522
• Journal Information: Environ. Toxicol. Chem., Journal Name: Environ. Toxicol. Chem. Journal Issue: 1 ; Jan. 2004 Vol. 23; ISSN ETOCDK; ISSN 0730-7268
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

54 ENVIRONMENTAL SCIENCES
ETHANE
HALOGENS
HYDROXIDES
IRON HYDROXIDES
ISOMERS
MINERALS
ORGANIC CHLORINE COMPOUNDS
REDUCTION
SUSPENSIONS
SYMMETRY