Influência do fator nutricional no desenvolvimento microbiano e em experimento de biorremediação de petróleo em sedimento e água de manguezal

Abstract

Hydrocarbon contamination in mangroves is a concerning environmental issue. Bioremediation is a promising alternative for remediating contaminated areas, as it utilizes microorganisms capable of metabolizing contaminants. In this study, we evaluated the efficacy of bioaugmentation and biostimulation using Aspergillus spp. fungi and alocasia macrorrhizos (l.) g.don plant extract in the bioremediation of mangrove sediments contaminated with hydrocarbons. We analyzed the influence of phosphorus and nitrogen concentrations in sediment and water on microbial activity. To do this, we set up bioreactors under various tide simulation conditions and monitored phosphorus, nitrogen and TOC concentrations in sediment and water over time. Results showed that the addition of plant extract as a biostimulant and fungi as a bioaugmenting agent significantly increased hydrocarbon degradation rates compared to the control. Additionally, we observed that higher concentrations of phosphorus and nitrogen in sediment and water accelerated the bioremediation process. We conclude that the use of plant extract and fungi is a promising strategy for the bioremediation of hydrocarbon-contaminated mangroves and that nutrient concentrations in sediment and water significantly influence microbial activity during the bioremediation process.