Avaliação Espacial E Sazonal Das Concentrações De Partículas Totais Em Suspensão E Elementos Metálicos Associados No Ar De Uma Cidade Do Sudeste Brasileiro

Abstract

SPATIAL AND SEASONAL EVALUATION OF CONCENTRATIONS OF TOTAL SUSPENDED PARTICLES AND ASSOCIATED METALLIC ELEMENTS IN THE AIR OF A SOUTHEASTERN BRAZILIAN CITY. The present study evaluated the concentrations of Total Suspended Particles (TSP) and associated metals in three distinct regions of Ribeirão Preto city (Center City, Campus and Airport) in the dry and rainy seasons. There were no significant differences (p < 0.05) in TSP and metals concentrations between the sampling sites, except for Cu, Cr and Zn. Seasonal variation was observed for TSP and the following associated metals: As, Be, Cu, Mn, Ni, Pb, Sn and V, being the highest concentrations observed in the dry period. The TSP concentrations did not exceed the air quality standards in São Paulo state, but these can cause harm to the population health, especially in the dry season. Cadmium was the only element that exceeded the WHO air quality guidelines in two consecutive samplings in the Center City and the Airport during the dry season. In this way, preventive measures should be taken through public policies to improve local air quality control and reduce the health risks to the population.

An assessment of atmospheric deposition of metals and the physico -chemical parameters of a rainwater harvesting system in Rio de Janeiro Brazil, by means of statistical multivariate analysis

“…The Mn concentrations in the rainfall are higher in the spring and winter, but lower in the summer and may be caused by changes in the source of pollutants that can be attributed to the wind direction, which has a seasonal effect (Cheng et al, 2011). An evaluation of total suspended particulates in urban areas in South-East Brazil concluded that Mn concentrations were significantly higher in the dry season and may have resulted from changes in the rainfall pattern (Machado et al, 2018).…”