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USE OF PLANT MATERIALS FOR THE BIOREMEDIATION OF SOIL FROM AN INDUSTRIAL SITE
Nunes, D.A.D, A.M. Salgado, E.F. da Gama-Rodrigues, R.G. Taketani, C.D. da Cunha, et al.
Journal of Environmental Science and Health, Part A 55(6):650-660(2020)

Two low-cost plant residues, sugarcane bagasse (SCB) and Mimosa caesalpiniifolia leaf litter (LL), were either added separately or combined to contaminated soil from a petroleum refinery to evaluate improvement in bioremediation area. The soil was analyzed 90 days after treatment. Individually, both amounts of SCB (20 and 40 g/kg) favored the growth of total heterotrophic bacteria and total fungi. In contrast, LL at 20 g/kg better stimulated the hydrocarbon-degrading microorganisms' activity in the soil. However, no TPH removal was observed under any of these conditions. Higher microbial growth was detected by the application of both plant residues in multi-contaminated soil. The maximum TPH removal of 30% was achieved in soil amended with 20 g/kg SCB and 20 g/kg LL. All the experimental conditions revealed changes in the microbial community structure related to the handling of the soil, with abundance of Alphaproteobacteria.



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