Organic contaminants can be oxidized rapidly in permanganate/bisulfite (PM/BS) process due to generation of Mn(III)_aq. However, the influence of O₂ and its role in contaminants degradation in PM/BS process are poorly understood. Thus, the influence of O₂ concentration on phenol removal was quantified and isotopic oxygen tracers (¹⁸O-labeled water and ¹⁸O₂) were employed to further unravel the mechanisms of PM/BS process. The introduction of O₂ to PM/BS process appreciably improved phenol oxidation. Under oxic conditions the oxidation products of bisulfite included SO₄^2- and HSO₅- while SO₄^2- was the single stable oxidation product under anaerobic conditions. The oxygen isotope labeling experiments confirmed that HSO₅- originated from the oxidation of SO₃⁻ by O₂ to SO₅⁻ and the following reduction of SO₅⁻ by HSO₃-. Incorporation of oxygen isotope from H₂¹⁸O to MnO₂ due to the disproportionation of Mn(III)_aq was observed, which verified the generation of Mn(III)_aq in PM/BS process. The critical influence of O₂ on PM/BS process was mainly associated with rapid oxidation of SO₃⁻ by O₂ to SO₅⁻, which otherwise competed with target contaminants for Mn(III)_aq. Oxygen from H₂O and/or O₂ can also be incorporated in the degradation products of organics in PM/BS process.

由于产生了Mn（III）_水溶液，有机污染物可以在高锰酸盐/亚硫酸氢盐（PM / BS）工艺中快速氧化。然而，人们对O ₂的影响及其在PM / BS工艺中污染物降解中的作用了解甚少。因此，量化了O ₂浓度对苯酚去除的影响，并使用同位素氧示踪剂（¹⁸ O标记的水和¹⁸ O ₂）进一步阐明了PM / BS过程的机理。将O ₂引入PM / BS工艺可显着改善苯酚的氧化。在有氧条件下，亚硫酸氢盐的氧化产物包括SO ₄ ^2-和HSO _5-，而SO₄ ^2-是厌氧条件下的单一稳定氧化产物。氧同位素标记实验证实HSO _5-源自SO ₃的氧化⁻由O ₂变为SO ₅⁻以及随后的SO ₅减少⁻通过HSO _3-。观察到由于Mn（III）_aq的歧化，从H ₂ ¹⁸ O到MnO ₂的氧同位素掺入，证实了PM / BS工艺中Mn（III）_aq的产生。O ₂对PM / BS过程的关键影响主要与SO _3的快速氧化有关⁻由O ₂变为SO ₅⁻，否则与目标污染物竞争Mn（III）_aq。在PM / BS工艺中，来自H ₂ O和/或O _2的氧气也可以掺入有机物的降解产物中。