Reaction probability of peroxyacetyl radical on aqueous surfaces

Peter W. Villalta; Edward R. Lovejoy; David R. Hanson

doi:10.1029/96GL01286

Reaction probability of peroxyacetyl radical on aqueous surfaces

Peter W. Villalta, Edward R. Lovejoy, David R. Hanson

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Abstract

The uptake coefficient for the loss of peroxyacetyl radical, CH₃C(O)O₂ (PA), on H₂O is measured to be 0.0043 (+0.0024/-0.0015) at 274&3 K. Uptake measurements onto aqueous solutions of sodium ascorbate yield limits for the PA Henry's law coefficient in H₂O (≤ 0.1 M atm^-1) and the CH₃C(O)O₂ hydrolysis rate coefficient (> 7×10⁵ M^-1 s^-1) at ∼275 K. These measurements support the hypothesis that PA heterogeneous reaction can mediate the loss of PAN in fog (Roberts et al., submitted manuscript, J. Geophys. Res., 1995). The most likely products of PA hydrolysis are HO₂ and acetic acid. PA hydrolysis may be a significant source of odd hydrogen at night as well as an important source of acetic acid in the atmosphere.

Original language	English (US)
Article number	96GL01286
Pages (from-to)	1765-1768
Number of pages	4
Journal	Geophysical Research Letters
Volume	23
Issue number	14
DOIs	https://doi.org/10.1029/96GL01286
State	Published - 1996
Externally published	Yes

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title = "Reaction probability of peroxyacetyl radical on aqueous surfaces",

abstract = "The uptake coefficient for the loss of peroxyacetyl radical, CH3C(O)O2 (PA), on H2O is measured to be 0.0043 (+0.0024/-0.0015) at 274&3 K. Uptake measurements onto aqueous solutions of sodium ascorbate yield limits for the PA Henry's law coefficient in H2O (≤ 0.1 M atm-1) and the CH3C(O)O2 hydrolysis rate coefficient (> 7×105 M-1 s-1) at ∼275 K. These measurements support the hypothesis that PA heterogeneous reaction can mediate the loss of PAN in fog (Roberts et al., submitted manuscript, J. Geophys. Res., 1995). The most likely products of PA hydrolysis are HO2 and acetic acid. PA hydrolysis may be a significant source of odd hydrogen at night as well as an important source of acetic acid in the atmosphere.",

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T1 - Reaction probability of peroxyacetyl radical on aqueous surfaces

AU - Villalta, Peter W.

AU - Lovejoy, Edward R.

AU - Hanson, David R.

PY - 1996

Y1 - 1996

N2 - The uptake coefficient for the loss of peroxyacetyl radical, CH3C(O)O2 (PA), on H2O is measured to be 0.0043 (+0.0024/-0.0015) at 274&3 K. Uptake measurements onto aqueous solutions of sodium ascorbate yield limits for the PA Henry's law coefficient in H2O (≤ 0.1 M atm-1) and the CH3C(O)O2 hydrolysis rate coefficient (> 7×105 M-1 s-1) at ∼275 K. These measurements support the hypothesis that PA heterogeneous reaction can mediate the loss of PAN in fog (Roberts et al., submitted manuscript, J. Geophys. Res., 1995). The most likely products of PA hydrolysis are HO2 and acetic acid. PA hydrolysis may be a significant source of odd hydrogen at night as well as an important source of acetic acid in the atmosphere.

AB - The uptake coefficient for the loss of peroxyacetyl radical, CH3C(O)O2 (PA), on H2O is measured to be 0.0043 (+0.0024/-0.0015) at 274&3 K. Uptake measurements onto aqueous solutions of sodium ascorbate yield limits for the PA Henry's law coefficient in H2O (≤ 0.1 M atm-1) and the CH3C(O)O2 hydrolysis rate coefficient (> 7×105 M-1 s-1) at ∼275 K. These measurements support the hypothesis that PA heterogeneous reaction can mediate the loss of PAN in fog (Roberts et al., submitted manuscript, J. Geophys. Res., 1995). The most likely products of PA hydrolysis are HO2 and acetic acid. PA hydrolysis may be a significant source of odd hydrogen at night as well as an important source of acetic acid in the atmosphere.

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Reaction probability of peroxyacetyl radical on aqueous surfaces

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