O'Loughlin Edward J, Burris David R
Air Force Research Laboratory, AFRL/MLQR, Tyndall AFB, Florida 32403-5301, USA.
Environ Toxicol Chem. 2004 Jan;23(1):41-8. doi: 10.1897/03-45.
Green rusts, mixed Fe(II)/Fe(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(I) (AgGR) and Cu(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(I) or Cu(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.
绿锈是存在于许多缺氧环境中的混合Fe(II)/Fe(III)氢氧化物矿物，已被证明能还原多种有机和无机污染物。研究了在绿锈水悬浮液中单独以及添加Ag(I)（AgGR）和Cu(II)（CuGR）时卤代乙烷的还原情况。六氯乙烷（HCA）、五氯乙烷（PCA）、1,1,1,2-四氯乙烷（1,1,1,2-TeCA）、1,1,2,2-四氯乙烷（1,1,2,2-TeCA）、1,1,1-三氯乙烷（1,1,1-TCA）、1,1,2-三氯乙烷（1,1,2-TCA）、1,1-二氯乙烷（1,1-DCA）和1,2-二溴乙烷在单独的绿锈、AgGR或CuGR存在下被还原；只有1,2-二氯乙烷和氯乙烷没有反应活性。一般来说，卤代程度更高的乙烷比卤代基团较少的乙烷还原速度更快（HCA > PCA > 1,1,1,2-TeCA > 1,1,1-TCA > 1,1,2,2-TeCA > 1,1,2-TCA > 1,1-DCA），卤代基团分布更不对称的异构体比对称性更高的异构体还原速度更快（例如，1,1,1-TCA > 1,1,2-TCA）。向绿锈悬浮液中添加Ag(I)或Cu(II)会导致卤代乙烷还原速率大幅增加，并且与单独的绿锈相比，产物分布也有显著差异。
