Effects of nitrogen source on crude oil biodegradation

Input of organic matter enhances degradation of weathered diesel fuel in sub-tropical sediments

“…Sediment pH in the treatments were periodically measured, and throughout the experiment ranged from 6.94 to 8.41. A significant decline in pH during hydrocarbon degradation could be expected (Wrenn et al, 1994); however in the present study the measured pH values resulted in minimal concern for acidity and were in general within the range for feasible hydrocarbon degradation (Das and Chandran, 2011). Total dissolved inorganic nitrogen (TDIN) and phosphorous (as PO 4 3− ) in sediments at the site had a concentration of 0.113 mg N kg −1 , and 0.412 mg P kg −1 sediment, respectively, suggesting low nutrient availability, especially when compared to previous investigations at nearby study areas (Horel et al, 2012a;Mortazavi et al, 2013b).…”

Bioremediation of Oil on Shoreline Environments: Development of Techniques and Guidelines

“…In addition to fulfilling regulatory compliance needs [53], they have been used to rank the efficacy of available products [14,58], and to identify the advantages and disadvantages of various forms of nutrients [59]. However, they are not meant to simulate the natural environment where conditions are in a constant state of flux with respect to tidal cycles and washout, temperature variation, climatic changes, freshwater/saltwater interactions, etc.…”

Just Add Water and Salt: the Optimisation of Petrogenic Hydrocarbon Biodegradation in Soils from Semi-arid Barrow Island, Western Australia

“…Several factors can influence the amount of N and P to be added to hydrocarbon-impacted soils , including indexation against the levels of C present in contaminated soils (Riser-Roberts 1998). Optimal nutrient dosages, however, vary with soil properties and environmental conditions and the concentration and nature of the hydrocarbon pollutant (Wrenn et al 1994;Carberry and Wik 2001;Walworth et al 1997).…”