The rates of single and simultaneous absorptions of dilute SO
2 and NO in aqueous mixed solutions of NaClO
2 and NaOH were measured at 25°C using a stirred vessel with a plain gas-liquid interface. In the SO
2-NaClO
2 system, the absorption rate exceeded the gas-film controlled rate, which implies the possibility of gas-phase oxidation of SO
2 due to the evolved C1O
2. In the SO
2-(NaClO
2+NaOH) system, the absorption rate agreed with that under gas-film controlled conditions. In the (SO
2+NO)-(NaClO
2+NaOH) system, the reduction of the NO absorption rate in the presence of SO
2 substantially exceeded that evaluated through the decrease in interfacial concentration of NaClO
2 and NaOH due to surface reaction with coexisting SO
2. The rate of absorption of SO
2 exceeded the gas-film controlled rate. The decomposition of NaClO
2 proceeds to a greater degree during simultaneous absorption than the single absorption of SO
2.
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