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Changes in concentrations of PMSO and PMSO2 in different persulfate systems over time at initial pH = 7.0 (experimental conditions: PMS system: [PMS]0 = 0.04 mM; [FeaqII]0 = 0.2 mM; [bicarbonate]0 = 0.5 mM; [PMSO]0 = 20.0 μM and PDS system: [PDS]0 = 1.0 mM; [FeaqII]0 = 2.0 mM; [bicarbonate]0 = 5.0 mM; [PMSO]0 = 200.0 μM).
