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Read Full Article (file size: 153169 bytes) Cited by
GEOPHYSICAL RESEARCH LETTERS,
VOL. 34,
L13804,
doi:10.1029/2007GL029775,
2007
Chemical destruction of CH3I, C2H5I, 1-C3H7I, and 2-C3H7I in saltwater
Charlotte E. Jones
Department of Chemistry, University of York, York, UK
Lucy J. Carpenter
Department of Chemistry, University of York, York, UK
Abstract
Destruction of volatile iodocarbons in the oceans can potentially play an important role in determining the predominant chemical
forms of iodine emitted to the atmosphere. Here we report chlorination and hydrolysis removal rates for CH3I, C2H5I, 1-C3H7I, and 2-C3H7I relevant to oceanic conditions. We have used these rates to calculate oceanic lifetimes for each iodocarbon with respect
to total chemical destruction, as a function of seawater temperature. The resulting lifetimes are compared to typical iodocarbon
oceanic residence times with respect to volatilization to the MBL. The rate of destruction of 2-C3H7I is much more rapid than chemical removal of the primary alkyl iodides, potentially explaining previous observations of lower
2-C3H7I concentrations in seawater compared to 1-C3H7I. Finally, in light of these results, we briefly discuss the potential impact of rising global seawater temperatures on oceanic
iodocarbon concentrations.
Received 21
February
2007;
accepted 3
May
2007;
published 14
July
2007.
Keywords: CH3I;
halocarbons;
alkyl iodides;
chemical destruction;
oceanic destruction;
nucleophilic substitution.
Index Terms: 3339 Atmospheric Processes: Ocean/atmosphere interactions (0312, 4504); 0312 Atmospheric Composition and Structure: Air/sea constituent fluxes (3339, 4504); 4850 Oceanography: Biological and Chemical: Marine organic chemistry (0470, 1050).
Read Full Article (file size: 153169 bytes) Cited by
Citation: Jones, C. E., and L. J. Carpenter
(2007),
Chemical destruction of CH3I, C2H5I, 1-C3H7I, and 2-C3H7I in saltwater,
Geophys. Res. Lett.,
34,
L13804,
doi:10.1029/2007GL029775.
Copyright 2007 by the American Geophysical Union.
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