Uso de bioensayos para potenciar la capacidad de absorción de metales pesados en Rizophora mangle, como estrategia de remediación de sedimentos contaminados

Abstract

The project evaluated by means of a bioassay the capacity of Rhizophora mangle (R. mangle) to absorb heavy metals from contaminated sediments (Sc) as a sustainable environmental remediation strategy. To achieve this objective, a chronic bioassay was conducted using Sc samples with heavy metals (Mp) that exceeded the maximum permissible limits established by international Sediment Quality Guidelines. This bioassay evaluated eight treatments over a 45-day period with sampling every 15 days for analysis of total mercury (HgT) levels. The treatments combined the use of R. mangle plants, bacteria and zeolites and the combination of these with Sc. The results indicated that all treatments that included R. mangle significantly reduced HgT concentrations, validating its potential as an effective tool for environmental remediation. The treatment with the highest HgT reduction was Sc, magle, bacteria and zeolites. In conclusion, the use of R.mangle as a viable solution to decontaminate sediments affected by Mp, contributing to the environmental health and sustainability of aquatic ecosystems, so it is essential to continue with the research and optimization of the use of mangrove as a remediator of contaminated ecosystems.