Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/18812
Tipo: Artigo
Título: A new biostimulation approach based on the concept of remaining P for soil bioremediation
Autor(es): Júlio, Aline Daniela Lopes
Fernandes, Rita de Cássia Rocha
Costa, Maurício Dutra
Neves, Júlio César Lima
Rodrigues, Edmo Montes
Tótola, Marcos Rogério
Abstract: C:N:P ratio is generally adopted to estimate the amount of nitrogen and phosphorus to be added to soils to accelerate biodegradation of organic contaminants. However, differences in P fixation among soils lead to varying amounts of available P when a specific dose of the element is applied to different soils. Thus, the application of fertilizers to achieve a previously established C:P ratio leads to biodegradation rates that can be lower than the theoretical maximum. In this study, we developed an equation to estimate the dose of P required to maximize organic contaminant biodegradation in soils as a function of remaining P (P-rem), using diesel as a model contaminant. The soils were contaminated with diesel and received six doses of P. CO 2 emission was used to estimate biodegradation of hydrocarbons. Biodegradation increased with P doses. The P level that provided the highest hydrocarbon biodegradation rate showed linear and negative correlation with P-rem. The result shows that the requirement for P decreases as the P-rem of the soil increases (or the P-fixing capacity decreases). The dose of P recommended to maximize hydrocarbon biodegradation rate in soil can be estimated by the formula P (mg/dm 3 ) 1⁄4 436.5e5.39 Â P-rem (mg/L).
Palavras-chave: Bioremediation
Biostimulation
Hydrocarbon biodegradation
Remaining P
Soil contamination
Editor: Journal of Environmental Management
Tipo de Acesso: Elsevier Ltd.
URI: https://doi.org/10.1016/j.jenvman.2017.11.061
http://www.locus.ufv.br/handle/123456789/18812
Data do documento: 28-Nov-2017
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