Detección de metales pesados en recursos hídricos mediante el análisis óptico de la flora expuesta

Abstract

Abstract: The waste from various industries, domestic and mineralogical are mostly dumped in rivers, generating environmental pollution by heavy metals. Currently, to determine the concentration of heavy metals, expensive techniquessuch as the atomic absorption technique are required. This work gives an alternative method through the indirect analysis, which consists in measure cadmium (Cd) and leads (Pb) through optical analysis (UV-VIS spectroscopy) of the flora in the region nearthe river. The vegetal cultivated with different concentrations of Cd and Pb were the Raphanus sativus. Through the analysis of the optical spectra, it was possible to determine a trend line between the concentrations and the light intensity, at a wavelength of 570 nm for Cd and 550 nm for Pb. The results also indicate that the amounts of cadmium and lead were found mostly in the leaves of the plant, which has a direct relationship with phytoremediation.