Relations Between Bulk Precipitation, PM10 Composition and Meteorological Conditions in the Metropolitan Area of Costa Rica
Jorge Herrera Murillo*, 1, Susana Rodríguez2, José Félix Rojas1, Armándo Baez3
Identifiers and Pagination:Year: 2012
First Page: 19
Last Page: 32
Publisher Id: TOASCJ-6-19
Article History:Received Date: 10/10/2011
Revision Received Date: 10/11/2011
Acceptance Date: 11/11/2011
Electronic publication date: 06/2/2012
Collection year: 2012
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Concentrations of inorganic ions (Cl-, H+, SO42-, NO3-, NH4+, Na+, K+, Ca2+, Mg2+) and metals (V, Ni, Cu, Pb, Cr Mn, Al, Fe) in bulk precipitation and PM10 samples collected in the metropolitan area of Costa Rica were analyzed. Good correlations between acidity in bulk precipitation with the concentrations of aerosols in the air were observed. The scavenging of the pollutants from the air directly affects the pH and composition of the bulk precipitation. The major ions in bulk precipitation in the metropolitan area of Costa Rica were SO42-, NH4+, Ca2+, Na+ ion percentages with 41.4, 12.0, 10.9 and 9.1 respectively. Al, Fe and Mn were the most abundant trace metals. The alkaline cations, NH4+ and Ca2+, actedas acid neutralizers and buffered the acidity of bulk precipitation. Meteorological conditions presented during the events determine the composition of bulk precipitation samples.