ASSESMENT OF DIESEL OIL TOXICITY ON SOME HYDROCARBONOCLASTIC BACTERIA ISOLATED FROM IKO RIVER ESTUARY IN THE NIGER DELTA
Journal Title: World Journal of Pharmaceutical and Medical Research - Year 2018, Vol 4, Issue 5
Abstract
This study investigated the toxicity of diesel oil on the diversity of hydrocarbonoclastic bacteria in Iko River estuarine ecosystems to ascertain reasons for poor natural attenuation of the ecosystems in the event of an oil spill. Water and sediment samples were collected from predetermined locations and subjected to microbiological analyses using standard methods. Bacterial identification results revealed taxonomic groups of hydrocarbonoclastic bacteria species including Proteus mirabilis strain IFSW, Bacillus cereus TESSWS3, Citrobacter amalonaticus strain Y2ESWS1,Citrobacter amalonaticus Y1FSW,Enterobacter sp.Y8ESWS3. Toxicity testing revealed that toxicant concentration, exposure time and bacteria type were key variables that mediated toxicity. A second-order polynomial regression model revealed significant (P<0.05, 0.01; R2=0.9862) relationship between exposure time and bacterial survivability at 20% diesel oil. The study revealed that the higher the diesel concentration, the higher the toxicity. At 20% concentration of diesel oil, the growth of Citrobacter amalonaticus Y1FSW, Proteus mirabilis strain IFSW and Enterobacter sp.Y8ESWS3 were retarded within 72 hrs and no acclimation period was observed in these isolates within 72 hrs. This could be attributed to the presence of low molecular weight compounds that are usually more toxic than long chain hydrocarbons, which are less soluble and bioavailable. Citrobacter amalonaticus strain Y2ESWS1 was tolerant to 80% of toxicant concentrations as was evidenced in its prolonged acclimation periods. In conclusion, this study has identified an uncommon hydrocarbonoclastic bacterium, Citrobacter amalonaticus strain Y2ESWS1, with commendable ability to tolerate reasonable concentrations of diesel oil. The bacterium is recommended for bio-augmentation in bioremediation technology of hydrocarbon-impacted estuarine ecosystems in the Niger Delta.
Authors and Affiliations
Abigail Johnny Nkanang
Keywords
Related Articles
- EP ID EP662797
- DOI -
- Views 166
- Downloads 0
ANTI-OXIDANT ACTIVITY AND PHYTOCHEMICAL SCREENING OF BALANITES AEGYPTIACA FRUITS
Balanites aegyptiaca has been reported to be an anti-helminthic, a purgative, febrifuge, emetic and can also cure other types of ailments like skin boils, malaria, wounds, colds, syphilis, liver and spleen disorders. Var...
TOTAL CHOLESTEROL AND HDL RATIO IN NORMOGLYCEMIC OFFSPRING OF PATIENT WITH T2DM ON GRADED EXERCISE
Objectives: The primary causes of Type 2 Diabetes Mellitus (T2DM) are largely unknown but increase in Total Cholesterol and HDL ratio (TC and HDL ratio) has been reported to be a risk factor for the T2DM through the alte...
NAME OF MANUSCRIPT: STUDY OF PSYCHIATRIC COMORBIDITY IN ALCOHOL DEPENDENCE SYNDROME. A CROSS SECTIONAL STUDY
Background: To assess psychiatric comorbidities in patients of alcohol dependence syndrome. Method: All the patients of alcohol dependence syndrome attending psychiatric Out Patient Department for alcohol de-addiction we...
DYSCHROMATOSIS UNIVERSALIS HEREDITARIA A CLINICO-EPIDEMIOLOGICAL STUDY FOR TWELVE CASES IN AL-RAMADI CITY
Background: Dyschromatosis universalis hereditaria is uncommon hereditary disease usually has autosomal dominant inheritance, its pathogenesis is unknown, characterized by generalized asymptomatic hyperpigmented and hypo...
PATTERN OF UTILIZATION AND METHODS OF PAYMENT FOR HEALTH SERVICES A SOUTH WESTERN CITY OF NIGERIA
Background: The evidence of awareness of public health facilities in rendering qualitative healthcare services has been observed and documented in recent years, but the same cannot be said for its utilization rates. This...