title: Kinetic and mechanistic reactivity. Isoprene impact on ozone levels in an urban area near Tijuca Forest, Rio de Janeiro.
abstract: Volatile organic compounds (VOCs) play a central role in atmospheric chemistry. In this work, the kinetic and mechanistic reactivities of VOCs are analyzed, and the contribution of the organic compounds emitted by anthropogenic and natural sources is estimated. VOCs react with hydroxyl radicals and other photochemical oxidants, such as ozone and nitrate radicals, which cause the conversion of NO to NO2in various potential reaction paths, including photolysis, to form oxygen atoms, which generate ozone. The kinetic reactivity was evaluated based on the reaction coefficients for hydroxyl radicals with VOCs. The mechanistic reactivity was estimated using a detailed mechanism and the incremental reactivity scale that Carter proposed. Different scenarios were proposed and discussed, and a minimum set of compounds, which may describe the tropospheric reactivity in the studied area, was determined. The role of isoprene was analyzed in terms of its contribution to ozone formation.
authors.affiliation: Centro de Tecnologia, Instituto de Química, Universidade Federal do Rio de Janeiro, Bloco A, Sala 402A, Cidade Universitária, Ilha do Fundão, Rio de Janeiro, RJ, 21949-900, Brazil.|Faculdade de Tecnologia, Universidade do Estado do Rio de Janeiro, Rodovia Presidente Dutra, km 298, Resende, RJ, 27537-000, Brazil.
authors.forename: Cleyton Martins
authors.initials: CM
authors.lastname: da Silva
authors.affiliation: Centro de Tecnologia, Instituto de Química, Universidade Federal do Rio de Janeiro, Bloco A, Sala 402A, Cidade Universitária, Ilha do Fundão, Rio de Janeiro, RJ, 21949-900, Brazil.
authors.forename: Luane Lima
authors.initials: LL
authors.lastname: da Silva
authors.affiliation: Faculdade de Tecnologia, Universidade do Estado do Rio de Janeiro, Rodovia Presidente Dutra, km 298, Resende, RJ, 27537-000, Brazil.
authors.forename: Sergio Machado
authors.initials: SM
authors.lastname: Corrêa
authors.affiliation: Centro de Tecnologia, Instituto de Química, Universidade Federal do Rio de Janeiro, Bloco A, Sala 402A, Cidade Universitária, Ilha do Fundão, Rio de Janeiro, RJ, 21949-900, Brazil. gracielaiq@gmail.com.
authors.forename: Graciela
authors.identifier: http://orcid.org/0000-0001-7732-8336
authors.initials: G
authors.lastname: Arbilla
mesh_terms: D000393:Air Pollutants / Q000032:analysis / Q000737:chemistry*; D002070:Butadienes / Q000737:chemistry*; D065928:Forests; D045782:Hemiterpenes / Q000737:chemistry*; D007700:Kinetics; D009566:Nitrates / Q000737:chemistry; D010126:Ozone / Q000032:analysis*; D010420:Pentanes / Q000737:chemistry*; D055549:Volatile Organic Compounds / Q000032:analysis / Q000737:chemistry*
chemical_list: D000393:Air Pollutants; D002070:Butadienes; D045782:Hemiterpenes; D009566:Nitrates; D010420:Pentanes; D055549:Volatile Organic Compounds; C005059:isoprene; D010126:Ozone
keywords: Isoprene; Ozone; Reactivity; Volatile organic compounds