Pyrex Journal of Microbiology and Biotechnology Research (PJMBR)

June 2016 Vol. 2(1), pp. 1-8

Copyright 2016 Pyrex Journals

Full Length Research Paper

The Microbiological and Physicochemical Properties of Some Crude Oil Contaminated and Uncontaminated Agricultural Soils in Ondo State, Nigeria

Ikuesan, Felix Adeleke*, Boboye, Bolatito Esther and Adetuyi, Fatusa Clement

Department of Microbiology, The Federal University of Technology, P. M. B. 704, Akure, Ondo State, Nigeria.

Corresponding Author E-mail:

Accepted 20th June, 2016


This study was undertaken to assess the microbiological and physico-chemical properties of some crude oil contaminated and uncontaminated agricultural soils in Ondo State, Nigeria. The identities of the crude oil degraders and some physicochemical properties of the soils collected from Awoye, Orioke-Iwamimo, Igodan-Lisa, Oba-Ile and Idoani all in Ondo State, Nigeria were studied using conventional microbiological, standard physical and chemical analytical techniques. The identities of the crude oil degrading microbes include Klebsiella pneumoniae, Klebsiella edwardsii, Pseudomonas aeruginosa, Bacillus subtilis, Bacillus megaterium, Alcaligenes faecalis, Proteus mirabilis, Acinetobacter mallei, Cephalosporium species, Trichoderma species, Fusarium species, Aspergillus species, Pullularia pullulans, Kodamaea ohmeri, Scopulariopsis brevicaulis, Paecilomyces variotii, Candida parapsilopsis, Mucor mucedo, and Trichophyton menragrophytes. The percentage crude oil degrading microbes ranged 23.00 - 28.74% and 12.09 90.04% respectively for bacteria and fungi. The Awoye and Orioke-Iwamimo soils contained the highest amounts of clay (40.07% and 39.67%) and silt (40.35% and 39.31%) respectively. Sand contents of the samples ranged from 18.66 - 68.36%. Organic carbon (4.70%), Organic matter (8.03%) and Total nitrogen (2.28%) were highest in Idoani while moisture contents were highest in Awoye (54. 12%) and Orioke-Iwamimo (54.80%) soil samples against the 8.36 9.38% for the other samples. The pH of the samples ranged 6.7 - 8.2. The total petroleum hydrocarbon contents of 8.59 - 13.27mg/kg were recorded for samples. Results also revealed varying amount of Copper, Lead, Nickel, Vanadium and Cadmium. This research showed that the soils vary in their physico-chemical characteristics and as well contained a wide array of crude oil degrading microbes that can be used in seeding of polluted soils for bioremediation.

Keywords: Microorganisms, crude oil degraders, physicochemical properties, Ondo State, bacteria, fungi, bioremediaton.

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