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This paper presents an analytical solution for three-dimensional advection-diffusion equation applied to the dispersion of reactive pollutants emitted into the Atmospheric Boundary Layer (PBL). Some substances when emitted in PBL suffer photochemical reactions, so a source term is included in the advection-diffusion equation to represent this reaction, turning the model more realistic. The pollutant concentration fields obtained by the proposed solution are compared with the mixing ratio data obtained by monitoring the air quality in the metropolitan region of Porto Alegre. With the analysis of the results can be seen that the inclusion of the term proposed to represent a photochemical reaction of a reactive pollutant, a is a new proposal for the prediction of pollutant concentration in PBL.

SOLUÇÃO ANALÍTICA PARA UM MODELO DE DISPERSÃO DE POLUENTES COM REAÇÃO FOTOQUÍMICA NA CAMADA LIMITE ATMOSFÉRICA