Toxicity of Water Accommodated Fractions of Waste Engine Oil on Growth of Selected Marine Algae

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Olaleye, Y.O
Kadiri, M.O
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West African Journal of Fisheries and Aquatic Sciences
Water Accommodated Fraction (WAF) is formed when water mix with oil under the influence of low or high energy. It is a solution of highly toxic mixtures of compounds which have high bioavailability to marine organisms and the potential of causing harmful effects. In this study, the growth inhibitory effects of WAF of waste engine oil on three (3) marine phytoplankton algae; Isochrysis galbana, Thalassiosira pseudonanaand Skeletonema tropicumwere investigated. The research was conducted in the laboratory for 14 days using different concentrations of WAF (5 %, 10 %, 15 %, 25 %, 50 %, 75 % and 100 %). Growth responses were measured spectrophotometrically at 750 nm absorbance. All the test algae were inhibited at concentrations ranging from 10 % to 100 % of WAF of waste engine oilwhereas, at 5% concentration algalgrowth stimulation was observed. Similarly, there was a consistent decrease in dry weight of all the algae with increasing concentration of WAF of waste engine oil except at 5 %. Isochrysis galbanawas generally more inhibited thanThalassiosira pseudonanaand Skeletonema tropicum. There were significant differences (p<0.05) in growth of microalgae at various concentrations of the WAF of waste engine oil.
Scholarly articles
Algae , Pollution , Waste engine oil , Water accommodated fraction , Research Subject Categories::NATURAL SCIENCES
Olaleye, Y. O., & Kadiri, M. O. (2021).Toxicity of water accommodated fractions of waste engine oil on growth of selected marine algae. West African Journal of Fisheries and Aquatic Sciences, 2(1), 1-8.