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- W2364336997 abstract "In the present work,thioanisole( PhSMe) was used as a simulant of yperite( HD),while NH3 and NaOH were used as alkaline modifiers to study the oxidation products,kinetics and mechanisms of the two-step oxidation of sulfides by alkaline-modified H2O2. The results indicated that PhS( O) Me and PhS( O)2Me were the only two oxidation products of PhSMe in modified H2O2 solution. Two different mechanisms of catalytic oxidation,proton-catalyzed oxidation and solventaided oxygen transfer,contributed to the primary oxidation of PhSMe( PhSMe→PhS( O) Me),and relative contributions of these two mechanisms strongly depended on additive amount of the alkaline modifiers and pH of the modified solution. Observed kinetic constants of the primary oxidation of PhSMe( kobs1) showed a three-stage profile with pH in both NH3 and NaOH modified H2O2 solution. While secondary oxidation of PhSMe( PhS( O) Me→PhS( O)2Me) was much slower than the primary oxidation,and the yield of PhS( O)2Me depended exponentially on pH of the modified H2O2 solutions. Compared to NaOH modified H2O2 solution, NH3 modified H2O2solution produced much less PhS( O)2Me at same pH and reaction time. Superoxide anions( O-2) was the reactive oxygen in same for the secondary oxidation of PhSMe,and addition of NH3 into the alkaline H2O2-based decontaminants could reduce the risks of over oxidation of sulfide since NH3 can react with O-2to consume the oxidant." @default.
- W2364336997 created "2016-06-24" @default.
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- W2364336997 date "2014-01-01" @default.
- W2364336997 modified "2023-09-26" @default.
- W2364336997 title "Two-step oxidation of thioanisole as yperite( HD) simulant by modified aqueous H_2O_2 solution" @default.
- W2364336997 hasPublicationYear "2014" @default.
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