Reduction of Polyhalogenated Methanes by Surface-Bound Fe(II) in Aqueous Suspensions of Iron Oxides

摘要: Uptake of ferrous iron from aqueous solution by oxides results in the formation a variety reactive surface species capable reducing polyhalogenated methanes (PHMs). Pseudo-first-order reaction rate constants, kobs, PHMs increased order CHBrCl2 < CHBr2Cl CHBr3 CCl4 CFBr3 CBrCl3 CBr2Cl2. The kobs values with exposure time, teq, Fe(II) to suspended which was attributed rearrangement initially sorbed more time. At pH 7.2, also concentration surface-bound iron, Fe(II)sorb, particularly when Fe(II)tot concentrations where precipitation becomes likely. fixed total concentrations, exponentially pH. highest reactivities were associated conditions is expected. Fe(II)sorb and pH, however, had opposite effects on product ...