2011
DOI: 10.1039/c0cp01497d
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Conversion of gaseous nitrogen dioxide to nitrate and nitrite on aqueous surfactants

Abstract: The hydrolytic disproportionation of gaseous NO 2 on water's surface (2 NO 2 + H 2 O -HONO + NO 3 À + H + ) (R1) has long been deemed to play a key, albeit unquantifiable role in tropospheric chemistry. We recently found that (R1) is dramatically accelerated by anions in experiments performed on aqueous microjets monitored by online electrospray mass spectrometry. This finding let us rationalize unresolved discrepancies among previous laboratory results and suggested that under realistic environmental conditio… Show more

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Cited by 46 publications
(58 citation statements)
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“…93 However, recent work has provided strong constraints on the unknown HONO daytime source and its relation to NO 2 chemistry. 26 Key ndings were that the rates of HONO production during daytime, R HONO , at a given site (1) are an order of magnitude faster than extrapolated nighttime rates of the hydrolytic disproportionation of NO 2 on wet surfaces, 27 (2) systematically increase with solar ux, peaking at noon but, however, (3) can be accounted neither by the reaction of excited NO 2 * with H 2 O(g), 28 reaction R9 nor by the reduction of NO 2 photosensitized by irradiated soot, [C-H] red *, reaction R10: 46,94 …”
Section: Observational Constraints On the Unknown Hono Daytime Sourcementioning
confidence: 99%
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“…93 However, recent work has provided strong constraints on the unknown HONO daytime source and its relation to NO 2 chemistry. 26 Key ndings were that the rates of HONO production during daytime, R HONO , at a given site (1) are an order of magnitude faster than extrapolated nighttime rates of the hydrolytic disproportionation of NO 2 on wet surfaces, 27 (2) systematically increase with solar ux, peaking at noon but, however, (3) can be accounted neither by the reaction of excited NO 2 * with H 2 O(g), 28 reaction R9 nor by the reduction of NO 2 photosensitized by irradiated soot, [C-H] red *, reaction R10: 46,94 …”
Section: Observational Constraints On the Unknown Hono Daytime Sourcementioning
confidence: 99%
“…The objective of this paper is to present an explicit chemical mechanism for R1, and show that its operation on wet SOA accounts for a suite of apparently unrelated, hitherto unexplained observations. The paper is organized as follows: we (1) report new laboratory results obtained by a novel technique developed in our laboratory [41][42][43][44] on the catalysis by dicarboxylic acid anions of the hydrolytic disproportionation of NO 2 (g) on aqueous surfaces (reaction R1) [45][46][47] as well as supporting quantum mechanical calculations and (2) show that such anions are normally produced in urban SOA from the photochemical oxidation of volatile organic compounds (VOCs). 48 We then review and summarize pertinent information on aerosol optical depth time series data over megacities, 49,50 and solar photolysis frequencies J(NO 2 ), J(O 1 D) and J(HONO) as functions of season and latitude.…”
Section: 21415mentioning
confidence: 99%
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