title: Degradation of hexachloroethane by Fenton's reagents.
abstract: The effect of hydrogen peroxide (H2O2) concentrations on the degradation of hexachloroethane (HCA) in the absence and the presence of tetrachloroethene (PCE) by Fenton's reagent was investigated at pH 3 with 1 mM iron(II) and H2O2 concentrations ranging from 0.01 M to 2 M. HCA degradation in the absence of PCE increased with increasing H2O2 concentration between 0.2 M and 2 M. In the presence of PCE, HCA degradation was similar to that in the absence of PCE for H2O2 concentration up to 1 M, but significantly higher for 2 M H2O2. We propose that this increase is a result of elevated reductant radicals when PCE is present. This study highlights the need for further investigation into the degradation of contaminant mixtures at higher H2O2 concentrations.
authors.affiliation: Department of Civil and Environmental Engineering, The University of Auckland, Private Bag 92019, Auckland Mail Centre, Auckland, 1142, New Zealand. ejho001@ec.auckland.ac.nz
authors.forename: E H
authors.initials: EH
authors.lastname: Jho
authors.forename: N
authors.initials: N
authors.lastname: Singhal
authors.forename: S
authors.initials: S
authors.lastname: Turner
mesh_terms: D004980:Ethane / Q000031:analogs & derivatives* / Q000737:chemistry; D006843:Hydrocarbons, Chlorinated / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D013750:Tetrachloroethylene / Q000737:chemistry
chemical_list: C045076:Fenton's reagent; D006843:Hydrocarbons, Chlorinated; D006861:Hydrogen Peroxide; D007501:Iron; C010182:hexachloroethane; D004980:Ethane; D013750:Tetrachloroethylene