Fitorremediación de suelos contaminados con metales pesados : Estudio de laboratorio de la fitorremediación de suelos contaminados con cadmio por medio de las especies Solanum nigrum y Ocimum basilicum.

Abstract

This Curricular Integration Work evaluated the bioaccumulation and translocation capacity of cadmium (Cd) of the plant species Solanum nigrum (nightshade) and Ocimum basilicum (basil), exposing them to contaminated soils through irrigation. For the investigation, 3 treatments were established based on the concentrations of Cd added to the substrate: T0 (0 mg Cd/kg), T1 (10 mg Cd/kg) and T2 (25 mg Cd/kg), watering 2 times per week. for 10 weeks. Each treatment included three replicates and at the end of the exposure period, they were harvested, separating the aerial part (stems and leaves) from the root, and a soil sample was taken, resulting in a total of 54 samples for the quantification of cadmium by spectrophotometry atomic absorption. The results highlight the effectiveness of S. nigrum and O. basilicum in the phytoextraction of cadmium (Cd), showing a significant accumulation of the metal in the aerial part, which increases with higher concentrations of Cd in the substrate. O. basilicum recorded a bioc