Evaluación in vitro de la capacidad de Maní forrajero (Arachis pintoi W.C) y Guarumo (Cecropia peltata L) en la biorremediación de suelos contaminados con mercurio.

Abstract

The present investigation´s objective was to evaluate the capacity of fodder peanuts (Arachis pintoi W.C.) and trumpet tree (Cecropia peltata L.) in the bioremediation of contaminated soils with mercury at the laboratory level. Plant growth was evaluated in cocoa and coffee subtrates, using a metric tape to measure the diameter and height of the plants every 15 days for two months; at the end of this period, the soil was contaminated at 7 ppm of Hg, carrying out initial analyses in the Labsu laboratory to check the concentration; for the diagnosis of the behavior of fodder peanuts and trumpet tree in soils contaminated with mercury, each month the number of leaves per species, the number of mortality and the number of leaves with chlorosis was recorded for 4 months, subsequently samples of contaminated soil were sent to the laboratory in order to determine which of the two species allows a greater reduction of mercury. Obtaining final analyzes, where the capacity by species to decrease mercury shows, for fodder peanut a decrease of 2.40 ppm (Hg) corresponding to 36.90% for trumpet tree a decrease of 3.42 ppm (Hg) of mercury corresponding to 52.62%. According to the results of the research, the best subtrate for the growth of both species was cocoa shell, trumpet tree (Cecropia peltata L.) is the species with the highest bioremediation and adaptability in soil contaminated with Hg under controlled conditions. It is recommended to future investigations of this type to perform an onsite

study in natural conditions without intervening, laboratory level to possess comparative studies and establish which the best option is.