Preliminary in vitro bioremediation potential of the fungus Favolus tenuiculus in heavy metal-contaminated soils
Synopsis
Napo, an ecuadorian Amazonian province, possesses soils containing heavy metals due to its geological conditions. At high concentrations, these metals pose a threat to ecosystems and human health. In this study, the potential of the fungus Favolus tenuiculus, native to the Amazon region, was evaluated for reducing metal concentrations in soil samples collected from an Amazonian chakra system. The composite soil sample was obtained from the chakra of the Atacapi community. Heavy metals were determined by X-ray fluorescence spectrophotometry before and after mycoremediation. The experiment consisted of three replicates of the soil sample inoculated with the fungus and one negative control. Spore quantification was performed using a Neubauer chamber, and a concentration of 5 × 10^6 spores/mL was used in each replicate. The reduction in heavy metal concentrations was evaluated after 37 days. Comparisons showed a reduction greater than 85% for arsenic, lead, barium, chromium, copper, manganese, and vanadium. These positive preliminary results encourage further investigation into the use of ligninolytic fungi as a sustainable and effective solution for mitigating heavy metal contamination in Amazonian soils.
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