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

Keywords: Algae, Pollution, Waste engine oil, Water accomodated fraction

Abstract

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 pseudonana and Skeletonema tropicum were 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 oil whereas, at 5% concentration algal growth 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 galbana was generally more inhibited than Thalassiosira pseudonana and Skeletonema tropicum.  There were significant differences (p<0.05) in growth of microalgae at various concentrations of the WAF of waste engine oil.

Author Biographies

Yusuf O. Olaleye, University of Lagos, Nigeria

Olaleye O. Yusuf is a Lecturer at the Department of Marine Sciences, Faculty of Science, University of Lagos, Nigeria. Area of Specialization: Algal Ecology, Aquatic Primary Productivity and Algal Biotechnology.

Medina O. Kadiri, University of Benin, Benin City, Nigeria.

Prof.  Medina Omo Kairi is a lecturer at the Department of Plant Biology and Biotechnology, University of Benin, Benin City, Nigeria. Area of Specialization: Phycology, Aquatic Primary Productivity and Algal Biotechnology.

Published
2021-05-22
How to Cite
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. Retrieved from http://wajfas.unilag.edu.ng/article/view/451
Issue
Vol 2 No 1 (2021)
Section
Research Articles

Copyright (c) 2021 Yusuf O. Olaleye, Medina O. Kadiri

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