2014
DOI: 10.1007/s00300-014-1630-7
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Hydrocarbon removal and bacterial community structure in on-site biostimulated biopile systems designed for bioremediation of diesel-contaminated Antarctic soil

Abstract: Several studies have shown that biostimulation can promote hydrocarbon bioremediation processes in Antarctic soils. However, the effect of the different nutrient sources on hydrocarbon removal heavily depends on the nutrients used and the soil characteristics. In this work, using a sample of chronically contaminated Antarctic soil that was exposed to a fresh hydrocarbon contamination, we analyzed how a complex organic nutrient source such as fish meal (FM) and a commercial fertilizer (OSEII) can affect hydroca… Show more

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Cited by 83 publications
(31 citation statements)
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“…Sphingomonads, in particular, have been previously described as key players in hydrocarbon degrading communities in cold soils4714. Caulobacteriaceae were also enriched upon contamination and, although not amongst the typical hydrocarbon degrading organisms, they have been increasingly detected in contaminated cold soils especially via gene-based analyses41429. A quite different response was instead observed in the Tayuan (TY) site where exposure to crude oil caused a distinct shift from Proteobacteria - to Actinobacteria -dominated bacterial community.…”
Section: Discussionmentioning
confidence: 99%
“…Sphingomonads, in particular, have been previously described as key players in hydrocarbon degrading communities in cold soils4714. Caulobacteriaceae were also enriched upon contamination and, although not amongst the typical hydrocarbon degrading organisms, they have been increasingly detected in contaminated cold soils especially via gene-based analyses41429. A quite different response was instead observed in the Tayuan (TY) site where exposure to crude oil caused a distinct shift from Proteobacteria - to Actinobacteria -dominated bacterial community.…”
Section: Discussionmentioning
confidence: 99%
“…In Antarctic environments, the freeze-thaw cycles are frequent every year and should be considered when adding fertilizer to the soil because the unfrozen water flux tends to disturb the nutrient distribution and unbalance the C:N:P ratio again. Fertilizer supplementation should be performed with care because excessive nitrogen levels may result in an inhibition of microbial activity [42]. Large amounts of contaminants can also inhibit biodegradation when the concentration is above the toxic threshold [37]; in this case, bioremediation should not be implemented without the prior use of physical removal methods.…”
Section: Environmental Factors and Bioremediation Techniques Appliedmentioning
confidence: 99%
“…In the case of low abundance or low metabolic activity of indigenous hydrocarbon-degrading microorganisms (e.g., due to lower temperature), the addition of microorganisms that were previously isolated in the laboratory and are known to be able to degrade the compound of interest can be used to improve biodegradation [42,50,51]. This technique, called bioaugmentation, aims to maintain a high microbial biomass [44].…”
Section: Applicationmentioning
confidence: 99%
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“…Therefore, for the 33 remediation of hydrocarbons alternative sources of nutrients with a better cost/benefit ratio have been 34 tested. Among these sources, we can mention urea (Simpanen et al, 2016); various biowastes like soy 35 cake (Dadrasnia and Agamuthu, 2014), poultry droppings (Ezenne et al, 2014), oil palm empty fruit 36 bunch, sugarcane bagasse (Hamzah et al, 2014), fish meal (Dias et al, 2015); NPK inorganic fertilizers 37 (Silva-Castro et al, 2015) and other commercial bioremediation agents (Dias et al, 2012). For each 38 particular case, the selection of the best source of nutrients seems to depend on the characteristics of the 1 soil under treatment, because the microbiota thriving in each soil is different and can exhibit dissimilar 2 metabolic requirements.…”
Section: Introductionmentioning
confidence: 99%