Kinetic study on the reaction between O2 and hydroxylamine

Tomat, Renoto; Rigo, Adelio; Salmaso, R.

doi:10.1016/s0022-0728(75)80180-x

Cited by 14 publications

(9 citation statements)

References 4 publications

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“…Another possibility is HA directly reduces O 2 into H 2 O 2 (Reactions ). However, this reaction appears to be minor due to the low reaction rate. …”

Section: Discussionmentioning

confidence: 99%

Activation of Oxygen and Hydrogen Peroxide by Copper(II) Coupled with Hydroxylamine for Oxidation of Organic Contaminants

Lee

Seo

et al. 2016

Environ. Sci. Technol.

192

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This study reports that the combination of Cu(II) with hydroxylamine (HA) (referred to herein as Cu(II)/HA system) in situ generates H2O2 by reducing dissolved oxygen, subsequently producing reactive oxidants through the reaction of Cu(I) with H2O2. The external supply of H2O2 to the Cu(II)/HA system (i.e., the Cu(II)/H2O2/HA system) was found to further enhance the production of reactive oxidants. Both the Cu(II)/HA and Cu(II)/H2O2/HA systems effectively oxidized benzoate (BA) at pH between 4 and 8, yielding a hydroxylated product, p-hydroxybenzoate (pHBA). The addition of a radical scavenger, tert-butyl alcohol, inhibited the BA oxidation in both systems. However, electron paramagnetic resonance (EPR) spectroscopy analysis indicated that (•)OH was not produced under either acidic or neutral pH conditions, suggesting that the alternative oxidant, cupryl ion (Cu(III)), is likely a dominant oxidant.

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“…Another possibility is HA directly reduces O 2 into H 2 O 2 (Reactions ). However, this reaction appears to be minor due to the low reaction rate. …”

Section: Discussionmentioning

confidence: 99%

Activation of Oxygen and Hydrogen Peroxide by Copper(II) Coupled with Hydroxylamine for Oxidation of Organic Contaminants

Lee

Seo

et al. 2016

Environ. Sci. Technol.

192

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“…The twoelectron reduction of O 2 to H 2 O 2 was observed in the HA/O 2 system in a previous study (eq 18). 47 However, H 2 O 2 was not detected in the present PI/HA and HA/O 2 systems, possibly because only the unprotonated HA is active for direct O 2 reduction in eq 18, whereas most HA is protonated in the present PI/HA reaction. Although the reaction between HA and H 2 O 2 may generate • OH, 13 we did not observe the coumarin fluorescence signal in the HA/O 2 solution (Figure S12), which indicates no production of H 2 O 2 .…”

mentioning

confidence: 62%

Production of Reactive Oxygen Species by the Reaction of Periodate and Hydroxylamine for Rapid Removal of Organic Pollutants and Waterborne Bacteria

Sun

Choi

2020

Environ. Sci. Technol.

176

114

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Periodate (PI, IO 4 − ) can be activated by hydroxylamine (HA), resulting in the rapid removal of organic pollutants within seconds. While the previous studies on PI-based advanced oxidation processes (AOPs) have proposed iodate radical ( • IO 3 ) as the major reactive species, no evidence of • IO 3 production was found in the present PI/HA system. Reactive oxygen species (ROS) including • OH, HO 2• , and 1 O 2 are proposed to be the main oxidants of the PI/HA system, which is supported by various tests employing the scavengers, chemical probes, and spin-trapping electron paramagnetic resonance (EPR) technique. To minimize the risk of toxic iodinated byproduct formation caused by reactive iodine species such as HOI and I 2 , the molar ratio of HA/PI was optimized at 0.6 to achieve the stoichiometric conversion of IO 4 − to iodate (IO 3 − ), a preferred nontoxic sink of iodine species. The PI/HA system also efficiently inactivated both Gram-positive and -negative bacteria with producing 1 O 2 as the dominant disinfectant. The mechanism of ROS production was also investigated and is discussed in detail. This work offers a simple and highly efficient option for PI activation and ROS production which might find useful applications where urgent and rapid removal of toxic pollutants is needed.

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“…Gould et al reported that Cbl(I) reacts with NH 3 OH + in strongly acidic aqueous solution (pH 0.95-2); [21] however the reaction is slow compared to the reaction between Cbl(I) and nitrite (see later; k = 4.1 m -1 s -1 , 25.0°C, I = 0.11 m) and would be expected to be orders of magnitude slower under the pH conditions of this study since protonation increases the redox potential of oxyanions [pK b (NH 2 OH) = 7.97]. [36] Cbl(I) is also stable in the presence of Cbl(III) (hydroxycobalamin) (see Supporting Information). However, in the presence of Cbl(II) (200 μm), only ≈70 % NH 2 OH was observed by the indooxine test (see Supporting Information).…”

Section: Determination Of the Amount Of Hydroxylamine Product Formedmentioning

confidence: 87%

Kinetic and Mechanistic Studies on the Reactions of the Reduced Vitamin B₁₂ Complex Cob(I)alamin with Nitrite and Nitrate

et al. 2011

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The kinetics of the reactions between cob(I)alamin [Cbl(I)] and nitrite and nitrate have been studied by UV/Vis and stopped‐flow spectroscopy. Enzyme‐bound Cbl(I) is an important transient species in several B12‐catalyzed enzyme reactions. Levels of nitrite and nitrate are elevated during oxidative stress, as a consequence of elevated nitric oxide levels. Although nitrite and nitrate are generally considered to be benign species, our studies show that nitrate and especially nitrite react rapidly with Cbl(I) at neutral pH conditions (kapp = 6.5 × 10–3 and 1.7 × 103 M–1 s–1, respectively, at pH 7, 25.0 °C). A reaction pathway is postulated for the reaction between Cbl(I) and (H)NO2 involving a 2e– rate‐determining step to form Cbl(III) and HNO. The latter species reacts further with Cbl(I), ultimately resulting in the oxidation of 4Cbl(I) by HNO2 to yield 4Cbl(II) and NH2OH. The reaction between Cbl(I) and (H)NO3 results in the oxidation of 8Cbl(I) by (H)NO3 to give 8Cbl(II) and NH4+ (pH 5–7).

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Kinetic study on the reaction between O2 and hydroxylamine

Cited by 14 publications

References 4 publications

Activation of Oxygen and Hydrogen Peroxide by Copper(II) Coupled with Hydroxylamine for Oxidation of Organic Contaminants

Activation of Oxygen and Hydrogen Peroxide by Copper(II) Coupled with Hydroxylamine for Oxidation of Organic Contaminants

Production of Reactive Oxygen Species by the Reaction of Periodate and Hydroxylamine for Rapid Removal of Organic Pollutants and Waterborne Bacteria

Kinetic and Mechanistic Studies on the Reactions of the Reduced Vitamin B₁₂ Complex Cob(I)alamin with Nitrite and Nitrate

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Kinetic study on the reaction between O2 and hydroxylamine

Cited by 14 publications

References 4 publications

Activation of Oxygen and Hydrogen Peroxide by Copper(II) Coupled with Hydroxylamine for Oxidation of Organic Contaminants

Activation of Oxygen and Hydrogen Peroxide by Copper(II) Coupled with Hydroxylamine for Oxidation of Organic Contaminants

Production of Reactive Oxygen Species by the Reaction of Periodate and Hydroxylamine for Rapid Removal of Organic Pollutants and Waterborne Bacteria

Kinetic and Mechanistic Studies on the Reactions of the Reduced Vitamin B12 Complex Cob(I)alamin with Nitrite and Nitrate

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Kinetic and Mechanistic Studies on the Reactions of the Reduced Vitamin B₁₂ Complex Cob(I)alamin with Nitrite and Nitrate