Chemical composition of total deposition samples collected in the metropolitan area of ​Costa Rica in 2012

Ciencias Ambientales

José F. Rojas¹  María Chaves²  Víctor H. Beita³  Jorge Herrera⁴ 

[1] Chemical and Research of the Laboratory for Environmental Analysis of the School of Environmental Sciences, University Nacional, Costa Rica;Chemical industries, is responsible for the Section of Water of the Laboratory for Environmental Analysis of the School of Environmental Sciences, University Nacional, Costa Rica;Chemical industry, is charge of the air section of the Laboratory for Environmental Analysis of the School of Environmental Sciences, University Nacional, Costa Rica;Coordinator of the Laboratory for Environmental Analysis of the School of Environmental Sciences, University Nacional, Costa Rica;

关键词: Water soluble ions;    Bulk precipitation;    Air pollution;    Urban pollution;    Costa Rica;   

DOI  :  http://dx.doi.org/10.15359/rca.48-2.3

来源: DOAJ

【 摘 要 】

Inorganic ions concentrations were measured on bulk precipitation samples in seven sites in San José, Heredia and Belen cities during the rainy season 2012. SO4-2, NO3-, Cl-, F-, PO4-3, NH4+, K+, Na+, Ca+2, Mg+2were analyzed by ion chromatography. The results indicated that Na+ and SO42− were the most abundant ions. Pearson's correlation, applied to all data, showed a high correlation between SO42- with NO3-, Ca2+ and NH4+, indicating an anthropogenic and neutralization origin respectively. The contribution of NO3- to neutralization was relatively small in comparison with SO42−. PCA analysis was used in order to indentify the mainly sources (crustal, neutralization and marine aerosol) and that contribute to the chemical composition of the bulk precipitation samples.

【 授权许可】

Unknown