Resumo

ARGUMEDO, Carlos Doria  e  CASTILLO, Juan Fagundo. Chemical characterization of particulated atmospheric matter PM₁₀ in Guajira, Colombia. Rev.Colomb.Quim. [online]. 2016, vol.45, n.2, pp.19-29. ISSN 0120-2804.  https://doi.org/10.15446/rev.colomb.quim.v45n2.56991.

During 2013, a study in La Guajira, Colombia, was conducted to characterize both aqueous and respirable fractions of particulate matter PM10, result of coal mining activities that occupy nearly 30% ofthe territory, and to evaluate its association with natural and anthropogenic sources. Filters collection was carried out through a monitoring system that consists in fourteen stations, using a high volume sampling equipment PM10 (Thermo Scientific VFC-PM10 High Volume Air Sampler). The extraction was done with hot water and the analysis by UV-VIS spectrophotometry. The highest concentrations correspond to SO4^2- (0.25 μg/ m³), Cl^- (0.19 μg/m³), NH₄⁺ (0.032 μg/m³), Na⁺ (1.98 μg/m³), Ca²⁺ (0.40 μg/m³) and Mg²⁺ (0.31 μg/m³). Results indicate that the main responsible sources of t e c emical content in particulate matter correspond to marine aerosol, impulsed by sea currents (Cl^-and Na⁺) from natural origin, and agricultural activities, livestock (NH4⁺) and mining (SO₄^2-, Ca²⁺ and Mg²⁺) from anthropo genic origin.

Palavras-chave : Particulate material PM₁₀; chemical composition; soluble ions; mining activities; La Guajira.

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