Carbon Isotope Fractionation in the Reductive Dehalogenation of Carbon Tetrachloride at Iron (Hydr) Oxide and iron Sulfide Minerals

摘要: Compound-specific isotope analysis (CSIA) is used increasingly in contaminant hydrology the attempt to assess nature as well extent of situ transformation reactions. Potentially, variations stable ratios along a plume may be quantify degradation. In present study, abiotic dehalogenation CCl4 by Fe(II) at surface different iron minerals has been characterized terms reaction rates and carbon isotopic fractionation (δ13C) tetrachloride (CCl4) yields signatures chloroform (CHCl3), one main products. The reductive was associated with substantial enrichment effects. observed factors, e, correlated neither surface-normalized rate constants nor type products formed but fell into two distinctly ranges for principal groups studied. With (...