Desempenho de duas espécies de eucalipto em solo com elevados teores de Mn

Currently, there is considerable interest in developing strategies that are efficient and durable in the remediation of soils contaminated with heavy metals. This study aimed to evaluate the development of Eucalyptus urophylla and Eucalyptus saligna grown in contaminated substrate with Mn collected in the area near the Port of Itaguai and location of disposal of hazardous waste of Cia Mercantil and Industrial Inga in Itaguai. The substrate was treated with two industrial waste, with a characteristic alkaline (slag of melt shop) and another with high content of iron oxide (lamination of scale). It was found that the untreated substrate, had a high content of Mn in fractions phytoavailable, being these values toxic to the species. The treatments caused a reduction in the concentrations of Mn in solution and exchangeable (fractions phytoavailable) and increase in more stable phases. The lowest dose of slay of melt shop was enough to decrease the concentrations of Mn in solution, and this effect is evidenced by the development of plants and in the higher dose of slay of melt shop the growth of studied species was more. Eucalyptus urophylla showed greater development and greater extraction of this element.