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Issue: June 2023

Volume 8 | Issue 6

Impact factor: 8.15

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Paper Title: Biodegradation of Benzo(a)Pyrene by Bacterial isolates from the Intestinal Gut lining of Bos tarus
Unique Id: IJSDR2206023
Published In: Volume 7 Issue 6, June-2022
Abstract: Crude oil together with its fractionated products is the linchpin of economic development in Nigeria. Since its discovery the country has become quite influential in the global scale but with this feat, activities from both approved and non- approved explorative facilities have endangered the environment as its generated exudates deposited into both the soil-water matrix has evaded many biodegradation stratagem. In spite of the many treatment protocols many toxic compounds including PAHs are left in the environment with members that are deleterious to human health. Benzo(a)Pyrene a four carbon member of the PAH family is arguably one of the most toxic because it has been implicated as a leading cause of various cancers. Bioremediation involving microbial species from different ecological niches have been useful in solving the problems of recalcitrant polyaromatic hydrocarbons from the environment. Polyaromatic hydrocarbons (PAHs) are environmental pollutants that can be found on many surfaces including grasses that are often consumed by ruminants. It was therefore hypothesized that bacteria in the intestine of cow may have the potential to degrade Benzo(a)Pyrene. Bacteria isolated from the intestinal chyme of the large intestine of a healthy cow identified and screened for PAH degradation potential was used for bioremediation of Benzo(a)Pyrene. Two isolates with the highest degradation capacity after preliminary screening tests, was used to inoculate carbon free Bushnell Haas medium containing the PAHs in single and combined cultures for the degradation tests. Samples were withdrawn at intervals of three days and analyzed for bacterial growth and concentration loss of the B(a)P for 16 days. The two test isolates selected after screening and identification were Escherichia coli and Klebsiella pneumoniae. HPLC/GCMS analyses showed that the concentration of Benzo[a]Pyrene declined by 84.8%,91.04% and 96.44% by E. coli, K. pnuemoniae and a combination of both respectively after 16 days. ANOVA confirmed significant differences in the extent of the degradation of the PAHs by the test bacteria and their combined cultures (P<0.05). The growth of the isolates combined peaked at 1.98 log cfu/ml between days 10 and 13 during degradation of B(a)P. Phthalate was the major degradation product in the course of degradation of B(a)P. E. coli and K. pneumoniae were identified by 16S rRNA. It can be concluded that the intestine of Bos tarus harbor strains of bacteria that are capable of a high degree of degradation of B(a)P and E. coli and K. pneumoniae can work synergistically for bioremediation of PAH-polluted environment.
Keywords: Bos tarus, gut lining, biodegradation Benzo(a)Pyrene
Cite Article: "Biodegradation of Benzo(a)Pyrene by Bacterial isolates from the Intestinal Gut lining of Bos tarus", International Journal of Science & Engineering Development Research (www.ijsdr.org), ISSN:2455-2631, Vol.7, Issue 6, page no.139 - 152, June-2022, Available :http://www.ijsdr.org/papers/IJSDR2206023.pdf
Downloads: 000223232
Publication Details: Published Paper ID: IJSDR2206023
Registration ID:200590
Published In: Volume 7 Issue 6, June-2022
DOI (Digital Object Identifier):
Page No: 139 - 152
Publisher: IJSDR | www.ijsdr.org
ISSN Number: 2455-2631

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