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Bull Environ Contam Toxicol

Title:		Isoprene Emissions and Ozone Formation in Urban Conditions: A Case Study in the City of Rio de Janeiro
Author(s):		da Silva CM; Correa SM; Arbilla G;
Address:		"Instituto de Quimica, Centro de Tecnologia, Universidade Federal do Rio de Janeiro, Bloco A, Sala 402A, Cidade Universitaria, Ilha do Fundao, Rio de Janeiro, RJ, Brazil. Universidade Veiga de Almeida, Campus Maracana, Tijuca, Rio de Janeiro, RJ, Brazil. Faculdade de Tecnologia, Universidade do Estado do Rio de Janeiro, Resende, RJ, Brazil. Instituto de Quimica, Centro de Tecnologia, Universidade Federal do Rio de Janeiro, Bloco A, Sala 402A, Cidade Universitaria, Ilha do Fundao, Rio de Janeiro, RJ, Brazil. gracielaiq@gmail.com"
Journal Title:		Bull Environ Contam Toxicol
Year:		2018
Volume:		20171213
Issue:		1
Page Number:		184 - 188
DOI:		10.1007/s00128-017-2248-6
ISSN/ISBN:		1432-0800 (Electronic) 0007-4861 (Linking)
Abstract:		"The potential role of isoprene oxidative processes, as well as the possible impact of air pollution on isoprene emissions, are more important in tropical cities, surrounded by rainforests. In this study, the contribution of isoprene to ozone formation was determined considering different scenarios, mainly volatile organic compounds/NO (x) (VOC/NO (x) ) ratios, and typical atmospheric conditions for the city of Rio de Janeiro, where more than 36% of the urbanized area is covered by vegetation. Ozone isopleths and incremental reactivity coefficients (IR) were evaluated to understand the direct contribution of isoprene to ground-level ozone formation and the negative impact of anthropogenic NO (x) emissions on the natural atmospheric balance. Although isoprene accounted for only 2.7% of the total VOC mass, excluding the isoprene concentration from the model reduced the maximum ozone value by 14.1%. The calculated IR coefficient (grams of O(3) formed per gram of added isoprene) was 2.2 for a VOC/NO (x) ratio of 8.86"
Keywords:		Air Pollutants/*analysis Air Pollution/*statistics & numerical data Brazil Butadienes/*analysis Cities Climate *Environmental Monitoring Hemiterpenes/*analysis Ozone/*analysis Pentanes/*analysis Volatile Organic Compounds/*analysis Biogenic volatile organ;
Notes:		"Medlineda Silva, Cleyton Martins Correa, Sergio Machado Arbilla, Graciela eng 2017/12/14 Bull Environ Contam Toxicol. 2018 Jan; 100(1):184-188. doi: 10.1007/s00128-017-2248-6. Epub 2017 Dec 13"