Reductive dechlorination of tetrachloroethylene by GRs with platinum Conference Paper uri icon

abstract

  • Green rust (GR), a layered Fe(II)-Fe(III) hydroxide solid phase with an anion in the interlayer, has been reported as an intermediate corrosion product of iron under natural and alkaline conditions in suboxic soil and sediments. It has been found to have the potential to reductively degrade organic and inorganic contaminants. Since it has been reported that the reactivity of iron-bearing soil minerals can be improved by the addition of trace metals, we investigated the effect of platinum (Pt) on the kinetics for the reductive degradation of tetrachloroethylene (PCE) by GRs. In this study, we synthesized four different types of GRs (GR-Cl, GR-SO 4, GR-CO 3 and GR-F) and modified them with Pt. The addition of Pt into GR suspensions successfully enhanced the reaction rates by more than three orders of magnitude compared to those of GRs alone. The fastest reaction was achieved by GR-F with Pt, which was three times faster than that by GR-SO 4 with Pt, the slowest one. In addition, the reactivity of GRs with Pt was evaluated at various Pt concentrations (0.5-2 mM). The reaction rate for the reductive degradation of PCE by GRs was significantly enhanced by the increase of Pt concentration.

published proceedings

  • ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY

author list (cited authors)

  • Choi, J., Shim, S. G., Batchelor, B., & Lee, W.

publication date

  • January 2007