Bioremediation in Mangrove Sediments Impacted by Oil Using Two Types of Fertilizers NPK and OSMOCOTE, Brazil

Abstract

Bioremediation is a technique applied to several environmental impacts, among which the ones generated by petroleum derivatives, through the introduction of microorganisms into the environment, or creating optimal conditions for them to develop. The present study aimed to evaluate the degradation of saturated hydrocarbons through the biostimulation technique in the mangrove sediment impacted by petroliferous activities, testing the potentiality of two fertilizers (NPK and OSMOCOTE) as accelerating agents of the biodegradation of petroleum components, under experimental conditions. In order to understand the bioremediation process it was used the quantification of nutrient contents, the percent of saturated, aromatic and NSO hydrocarbons, and the behavior of saturated compounds along the entire experiment, besides the monitoring of physical and chemical parameters. Chromatographic profiles characterized a major degradation of saturated hydrocarbons at the units with NPK, presenting a better efficiency of this fertilizer in the tested biostimulation process

Effects of Freeze–Thaw Phenomena on Controlled Nutrient Release: Application to Bioremediation

“…The rapid release of nitrogen from Osmocote™ following 20 days suggests a lag period in release followed by accelerated diffusion through the particle coating, as has been reported elsewhere . This accelerated diffusion from Osmocote™ is reflected in a high negative water potential that may invoke osmotic stress on PHC degraders .…”

Bioremediation of Oil‐Contaminated Beach and Restinga Sediments Using a Slow‐Release Fertilizer

“…The purpose of this research was to use bioremediation through biostimulation in restinga sediments under laboratory conditions to reproduce the environmental conditions of the study area and simulate oil spills that are caused by an accident involving a buried pipeline. This study involved the application of Osmocote®, which was previously tested in other bioremediation studies . Two different scenarios were built: a superficial contamination of the beach sediment in case of an oil leakage in the submarine part of the pipeline reaching seawater first and then the beach sediment, and a sub‐superficial contamination occurring after the pipeline was buried.…”