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Marine Pollution Bulletin
Volume 169, 2021, 112553

Bioremediation of polycyclic aromatic hydrocarbons in contaminated mangroves: Understanding the historical and key parameter profiles

Felipe Filgueirasde Almeida, Danúbia Freitas, Fabrício Motteran, Bruna Soares Fernandes, Sávia Gavazza

Department of Civil Engineering, Federal University of Pernambuco (UFPE), Acadêmico Hélio Ramos Avenue, s/n, 50740-530 Recife, PE, Brazil.

Abstract

Sensitive biomes, such as coastal ecosystems, have become increasingly susceptible to environmental impacts caused by oil logistics and storing, which, although more efficient nowadays, still cause spills. Thus, bioremediation techniques attract attention owing to their low impact on the environment. Among petroleum-based compounds, polycyclic aromatic hydrocarbons (PAHs) are known for their potential impact and persistence in the environment. Therefore, PAH bioremediation is notably a technique capable of reducing these polluting compounds in the environment. However, there is a lack of understanding of microbial growth process conditions, leading to a less efficient choice of bioremediation methods. This article provides a review of the bioremediation processes in mangroves contaminated with oils and PAHs and an overview of some physicochemical and biological factors. Special attention was given to the lack of approach regarding experiments that have been conducted in situ and that considered the predominance of the anaerobic condition of mangroves.

Keywords: Coastal ecosystem, Polycyclic aromatic hydrocarbons, Mangroves, Oil products, Microorganisms, Biological degradation.

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