Matches in SemOpenAlex for { <https://semopenalex.org/work/W4225565546> ?p ?o ?g. }
Showing items 1 to 49 of
49
with 100 items per page.
- W4225565546 abstract "<strong class=journal-contentHeaderColor>Abstract.</strong> Photooxidation of volatile organic compounds (VOCs) produces condensable oxidized organics (COOs) to yield secondary organic aerosol (SOA), but the fundamental chemical mechanism for gas-to-particle conversion remains uncertain. Here we elucidate the production of COOs and their roles in SOA and brown carbon (BrC) formation from <span class=inline-formula><i>m</i></span>-xylene oxidation by simultaneously monitoring the evolution of gas-phase products and aerosol properties in an environmental chamber. Four COO types with the distinct functionalities of dicarbonyls, carboxylic acids, polyhydroxy aromatics/quinones, and nitrophenols are identified from early-generation oxidation, with the yields of 25â%, 37â%, 5â%, and 3â%, respectively. SOA formation occurs via several heterogeneous processes, including interfacial interaction, ionic dissociation/acidâbase reaction, and oligomerization, with the yields of (20â<span class=inline-formula>±</span>â4)â% and (32â<span class=inline-formula>±</span>â7)â% at 10â% and 70â% relative humidity (RH), respectively. Chemical speciation shows the dominant presence of oligomers, nitrogen-containing organics, and carboxylates at high RH and carboxylates at low RH. The identified BrC includes N-heterocycles/N-heterochains and nitrophenols, as evident from reduced single scattering albedo. The measured uptake coefficient (<span class=inline-formula><i>γ</i></span>) for COOs is dependent on the functionality, ranging from 3.7â<span class=inline-formula>Ã</span>â10<span class=inline-formula><sup>â4</sup></span> to 1.3â<span class=inline-formula>Ã</span>â10<span class=inline-formula><sup>â2</sup></span>. A functionality-based kinetic framework is developed to predict SOA production from the observed concentrations and uptake coefficients for COOs, which reproduces the measurement from <span class=inline-formula><i>m</i></span>-xylene oxidation. Our results reveal that photochemical oxidation of <span class=inline-formula><i>m</i></span>-xylene represents a major source for SOA and BrC formation under urban environments, because of its large abundance, high reactivity with OH, and high yields for COOs." @default.
- W4225565546 created "2022-05-05" @default.
- W4225565546 creator A5060576427 @default.
- W4225565546 date "2022-04-08" @default.
- W4225565546 modified "2023-10-14" @default.
- W4225565546 title "Reply on RC2" @default.
- W4225565546 doi "https://doi.org/10.5194/acp-2021-951-ac2" @default.
- W4225565546 hasPublicationYear "2022" @default.
- W4225565546 type Work @default.
- W4225565546 citedByCount "0" @default.
- W4225565546 crossrefType "peer-review" @default.
- W4225565546 hasAuthorship W4225565546A5060576427 @default.
- W4225565546 hasBestOaLocation W42255655461 @default.
- W4225565546 hasConcept C102931765 @default.
- W4225565546 hasConcept C127413603 @default.
- W4225565546 hasConcept C147176958 @default.
- W4225565546 hasConcept C161790260 @default.
- W4225565546 hasConcept C178790620 @default.
- W4225565546 hasConcept C185592680 @default.
- W4225565546 hasConcept C2778753569 @default.
- W4225565546 hasConcept C2779345167 @default.
- W4225565546 hasConcept C32909587 @default.
- W4225565546 hasConcept C512735826 @default.
- W4225565546 hasConceptScore W4225565546C102931765 @default.
- W4225565546 hasConceptScore W4225565546C127413603 @default.
- W4225565546 hasConceptScore W4225565546C147176958 @default.
- W4225565546 hasConceptScore W4225565546C161790260 @default.
- W4225565546 hasConceptScore W4225565546C178790620 @default.
- W4225565546 hasConceptScore W4225565546C185592680 @default.
- W4225565546 hasConceptScore W4225565546C2778753569 @default.
- W4225565546 hasConceptScore W4225565546C2779345167 @default.
- W4225565546 hasConceptScore W4225565546C32909587 @default.
- W4225565546 hasConceptScore W4225565546C512735826 @default.
- W4225565546 hasLocation W42255655461 @default.
- W4225565546 hasOpenAccess W4225565546 @default.
- W4225565546 hasPrimaryLocation W42255655461 @default.
- W4225565546 hasRelatedWork W1978925349 @default.
- W4225565546 hasRelatedWork W1981979799 @default.
- W4225565546 hasRelatedWork W2011670611 @default.
- W4225565546 hasRelatedWork W2031600306 @default.
- W4225565546 hasRelatedWork W2080294191 @default.
- W4225565546 hasRelatedWork W2088669026 @default.
- W4225565546 hasRelatedWork W2949417749 @default.
- W4225565546 hasRelatedWork W2950542371 @default.
- W4225565546 hasRelatedWork W2951855440 @default.
- W4225565546 hasRelatedWork W2952538066 @default.
- W4225565546 isParatext "false" @default.
- W4225565546 isRetracted "false" @default.
- W4225565546 workType "peer-review" @default.