Análisis correlacional y contenido de metales pesados en sedimentos superficiales de la avenida Argimiro Gabaldón de la ciudad de Barcelona, Estado Anzoátegui, Venezuela

Abstract

We investigated the concentration levels of heavy metals (Cu, Ni, Pb, Cr and Zn) in soils adjacent to the Argimiro Gabaldón, Avenue, Barcelona (Anzoátegui).Ni and Cr showed lower values than that permitted by the Venezuelan legislation while the Zn, Pb and Cu exceeded the permissible limits. Application of Principal Component Analysis–PCA synthesized that the first two principal components reach the 88.92% of the total variability of the data, obtaining high correlation coefficient and showing a direct proportional contribution for all variables and also there are two groups significantly different Pb-Zn y Ni-Cr-Cu. The nonparametric Friedman’s test showed significant differences between metals, highlighting comparisons with Lead.

Keywords

• Heavy metals
• Sediments
• Friedman’s test
• Principal component analysis