标题：Source Apportionment of Polycyclic AromaticHydrocarbons (PAHs) in a Tropical EstuarineEpipelic Sediment and Its Associated BacterialDegrading Potentials
期刊名称：Current Journal of Applied Science and Technology
印刷版ISSN：2457-1024
出版年度：2019
卷号：32
期号：1
语种：English
出版社：Sciencedomain International
摘要：The present study was designed to evaluate the distribution and sources of polycyclic aromatic hydrocarbons (PAHs) and the degradation potentials of bacteria associated with the Iko River estuarial epipelic sediment using standard analytical and microbiological techniques. The results of the analysis revealed that the mudflat of the ecosystem contained varying levels of PAHs with lower molecular weight (2-3 rings), with concentrations ranging from 4.9 – 5.2 mg/kg. The levels of 4-ringed, 5- ringed and 6-ringed PAHs ranged from 1.30 to 1.44, 2.14 – 2.47 and 0.20 – 1.53 mg/kg, respectively. The molecular diagnostic ratios of relevant PAH congeners revealed that the ecosystem is contaminated with PAH from multiple (petrogenic and/or pyrogenic) sources. Among the bacterial strains isolated from the sediment samples, Pseudomonas aeruginosa, Bacillus subtilis and Micrococcus luteus were found to possess strong PAHs degrading capabilities. The isolation of bacteria with PAH degradability from the mudflat is an indication that the ecosystems have the capability to recover through natural attenuation over time.
