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- W2419374219 endingPage "10783" @default.
- W2419374219 startingPage "10767" @default.
- W2419374219 abstract "Atmospheric oxidation reactions are known to affect the chemical composition of organic aerosol (OA) particles over timescales of several days, but the details of such oxidative aging reactions are poorly understood. In this study we examine the rates and products of a key class of aging reaction, the heterogeneous oxidation of particle-phase organic species by the gas-phase hydroxyl radical (OH). We compile and reanalyze a number of previous studies from our laboratories involving the oxidation of single-component organic particles. All kinetic and product data are described on a common basis, enabling a straightforward comparison among different chemical systems and experimental conditions. Oxidation chemistry is described in terms of changes to key ensemble properties of the OA, rather than to its detailed molecular composition, focusing on two quantities in particular, the amount and the oxidation state of the particle-phase carbon. Heterogeneous oxidation increases the oxidation state of particulate carbon, with the rate of increase determined by the detailed chemical mechanism. At the same time, the amount of particle-phase carbon decreases with oxidation, due to fragmentation (C-C scission) reactions that form small, volatile products that escape to the gas phase. In contrast to the oxidation state increase, the rate of carbon loss is nearly uniform among most systems studied. Extrapolation of these results to atmospheric conditions indicates that heterogeneous oxidation can have a substantial effect on the amount and composition of atmospheric OA over timescales of several days, a prediction that is broadly in line with available measurements of OA evolution over such long timescales. In particular, 3-13% of particle-phase carbon is lost to the gas phase after one week of heterogeneous oxidation. Our results indicate that oxidative aging represents an important sink for particulate organic carbon, and more generally that fragmentation reactions play a major role in the lifecycle of atmospheric OA." @default.
- W2419374219 created "2016-06-24" @default.
- W2419374219 creator A5002561581 @default.
- W2419374219 creator A5046891927 @default.
- W2419374219 creator A5052366740 @default.
- W2419374219 creator A5069301909 @default.
- W2419374219 date "2015-09-30" @default.
- W2419374219 modified "2023-10-14" @default.
- W2419374219 title "Heterogeneous Oxidation of Atmospheric Organic Aerosol: Kinetics of Changes to the Amount and Oxidation State of Particle-Phase Organic Carbon" @default.
- W2419374219 cites W1561878391 @default.
- W2419374219 cites W1634791384 @default.
- W2419374219 cites W1738160726 @default.
- W2419374219 cites W1965571022 @default.
- W2419374219 cites W1966440503 @default.
- W2419374219 cites W1966521768 @default.
- W2419374219 cites W1972587396 @default.
- W2419374219 cites W1976186159 @default.
- W2419374219 cites W1977216233 @default.
- W2419374219 cites W1978654664 @default.
- W2419374219 cites W1982056270 @default.
- W2419374219 cites W1982375030 @default.
- W2419374219 cites W1982445369 @default.
- W2419374219 cites W1986418366 @default.
- W2419374219 cites W1986615978 @default.
- W2419374219 cites W1987048363 @default.
- W2419374219 cites W1987742312 @default.
- W2419374219 cites W1988963778 @default.
- W2419374219 cites W1989092885 @default.
- W2419374219 cites W1996488940 @default.
- W2419374219 cites W1999020034 @default.
- W2419374219 cites W2000500465 @default.
- W2419374219 cites W2001219782 @default.
- W2419374219 cites W2001411808 @default.
- W2419374219 cites W2002212694 @default.
- W2419374219 cites W2004758304 @default.
- W2419374219 cites W2005266319 @default.
- W2419374219 cites W2005833157 @default.
- W2419374219 cites W2007290644 @default.
- W2419374219 cites W2009598421 @default.
- W2419374219 cites W2012035537 @default.
- W2419374219 cites W2018068534 @default.
- W2419374219 cites W2021064175 @default.
- W2419374219 cites W2021137726 @default.
- W2419374219 cites W2023037439 @default.
- W2419374219 cites W2027848276 @default.
- W2419374219 cites W2031454636 @default.
- W2419374219 cites W2034708176 @default.
- W2419374219 cites W2035719035 @default.
- W2419374219 cites W2036736187 @default.
- W2419374219 cites W2039288172 @default.
- W2419374219 cites W2041991762 @default.
- W2419374219 cites W2049816315 @default.
- W2419374219 cites W2051775107 @default.
- W2419374219 cites W2054552851 @default.
- W2419374219 cites W2056159787 @default.
- W2419374219 cites W2059334980 @default.
- W2419374219 cites W2062147111 @default.
- W2419374219 cites W2067958286 @default.
- W2419374219 cites W2075810138 @default.
- W2419374219 cites W2077425974 @default.
- W2419374219 cites W2081118881 @default.
- W2419374219 cites W2082597188 @default.
- W2419374219 cites W2084091917 @default.
- W2419374219 cites W2089287817 @default.
- W2419374219 cites W2091168122 @default.
- W2419374219 cites W2092444956 @default.
- W2419374219 cites W2097089299 @default.
- W2419374219 cites W2102580125 @default.
- W2419374219 cites W2102717803 @default.
- W2419374219 cites W2103812039 @default.
- W2419374219 cites W2104277321 @default.
- W2419374219 cites W2106999449 @default.
- W2419374219 cites W2107371694 @default.
- W2419374219 cites W2108154709 @default.
- W2419374219 cites W2109419617 @default.
- W2419374219 cites W2116507044 @default.
- W2419374219 cites W2120270786 @default.
- W2419374219 cites W2122054302 @default.
- W2419374219 cites W2122574093 @default.
- W2419374219 cites W2122770087 @default.
- W2419374219 cites W2126126781 @default.
- W2419374219 cites W2126430862 @default.
- W2419374219 cites W2127510753 @default.
- W2419374219 cites W2132887357 @default.
- W2419374219 cites W2134150838 @default.
- W2419374219 cites W2137091329 @default.
- W2419374219 cites W2138542831 @default.
- W2419374219 cites W2141507669 @default.
- W2419374219 cites W2144188667 @default.
- W2419374219 cites W2144448974 @default.
- W2419374219 cites W2144923407 @default.
- W2419374219 cites W2145123870 @default.
- W2419374219 cites W2148582299 @default.
- W2419374219 cites W2149129262 @default.
- W2419374219 cites W2153890895 @default.
- W2419374219 cites W2155011965 @default.
- W2419374219 cites W2161516788 @default.
- W2419374219 cites W2162755664 @default.