All chemical stock solutions used in this study were prepared using ultrapure (filtered, distilled, deionized) water from a Millipore system (Millipore Model Milli-Q Academic A10). Siderite was obtained from the Wuhan Iron and Steel (Group) Corporation, China. Hydrogen peroxide (H2O2, ~30 wt. % in water), sodium persulfate (Na2S2O8, >98%), trichloroethene (TCE, >99% purity), sodium phosphate monobasic (NaH2PO4, ≥99% purity), 1,2-dichloroethane (DCA, ~99.8% purity) were purchased from Beijing Chemical Works.
The following reagent concentrations were used for all of the experiments. Oxidant concentrations were selected based on the results of previous studies employing persulfate and H2O2 (Yan et al. 2013 , 2015 (link)). For TCE, 10 µL of pure TCE was added to each vial for the relevant experiments. This quantity is equivalent to 11.15 mM (1,500 mg/L) in solution. This equivalent concentration exceeds the aqueous solubility of TCE, reflecting the presence of TCE liquid. DCA: 5 mM (495 mg/L), Na2S2O8: 6.3 mM (1,500 mg/L), H2O2: 150 mM (5,100 mg/L), siderite: 11,450 mg/L. These oxidant concentrations are relatively low compared to typical concentrations used for field applications. Thus, these concentrations will produce conservative results.
The following reagent concentrations were used for all of the experiments. Oxidant concentrations were selected based on the results of previous studies employing persulfate and H2O2 (Yan et al. 2013 , 2015 (link)). For TCE, 10 µL of pure TCE was added to each vial for the relevant experiments. This quantity is equivalent to 11.15 mM (1,500 mg/L) in solution. This equivalent concentration exceeds the aqueous solubility of TCE, reflecting the presence of TCE liquid. DCA: 5 mM (495 mg/L), Na2S2O8: 6.3 mM (1,500 mg/L), H2O2: 150 mM (5,100 mg/L), siderite: 11,450 mg/L. These oxidant concentrations are relatively low compared to typical concentrations used for field applications. Thus, these concentrations will produce conservative results.
