Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 590, Issue -, Pages 194-203Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2017.02.204
Keywords
Potter cove; Geomembrane; Antarctic soils; Response-surface methodology; Soil pollution, diesel contamination
Categories
Funding
- Agencia Nacional de Promocion Cientifica y Tecnologica (ANPCyT) [PICTO 2010-0124]
- Universidad de Buenos Aires [UBA 20020100100378]
- European Commission [318718]
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Bioremediation proved to be an effective approach to deal with soil contamination, especially in isolated, cold environments such as Antarctica. Biostimulation, involving the addition of macronutrients -mainly nitrogen and phosphorous-is considered the simplest and cheapest bioremediation process. Optimizing the levels of these nutrients is a key step prior to the application of a biostimulation strategy. In this work, N and P levels, optimized by Response Surface Methodology (RSM) at lab-scale, were applied to an Antarctic hydrocarbon contaminated soil. The process was performed on-site, using high density polyethylene geomembranes (800 mu m) to isolate treated soil from the surroundings and under environmental conditions at Carlini station (Antarctica) during 50 days. Two 0.5 ton biopiles were used as experimental units; a control biopile (CC), and a biostimulated system (BS), amended with N and P. At the end of the assay, hydrocarbon removal was significantly higher in BS system compared to CC ( 75.79% and 49.54% respectively), showing that the applied strategy was effective enough to perform a field-assay in Antarctica that significantly reduce soil contamination levels; and proving that RSM represents a fundamental tool for the optimization of nutrient levels to apply during bioremediation of fuel contaminated cold soils. (C) 2017 Elsevier B.V. All rights reserved.
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