Faculty of Biology, University of Latvia
EEB
Hard copy: ISSN 1691–8088
On-line: ISSN 2255–9582
Env Exp Biol (2013) 11: 145–150
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Environmental and
Experimental
Biology

Env Exp Biol (2013) 11: 145–150

Original Article

A comparative assessment of the crude oil-remediating potential of Cynodon dactylon and Eleusine indica

Stephen Oyedeji1*, Idris Olawale Raimi2, Anthony Ifechukwude Odiwe3
1Department of Plant Biology, University of Ilorin, 240003, Ilorin, Nigeria
2Institute of Ecology and Environmental Studies, Obafemi Awolowo University, 220005, Ile-Ife, Nigeria
3Department of Botany, Obafemi Awolowo University, 220005, Ile-Ife, Nigeria
*Corresponding author, E-mail: princeseyed1st@yahoo.com

Abstract

The study was performed to compare the crude oil-remediating potential of Cynodon dactylon and Eleusine indica in a screenhouse. The experimental design was completely randomized. Treatments used were crude oil concentrations: 0 (control), 2.5, 5.0, 7.5, 10.0 and 12.5 mL in 3 kg of soil, denoted as T0, T2.5, T5.0, T7.5, T10.0 and T12.5, respectively. Twelve weeks after planting, plants were harvested, weighed fresh and oven-dried at 80°C to constant mass. Total hydrocarbon content in plant and soil samples, and soil physicochemical parameters were determined. Student’s t-test was used for comparison between grasses while ANOVA and Duncan Multiple Range Test were used to test significant differences between treatment mean values at 5% level of significance. Fresh and dry mass were significantly higher in E. indica than C. dactylon. Total hydrocarbon content in soil and plant were significantly lower in soil under the E. indica than C. dactylon. Soil pH and exchangeable acidity did not significantly differ in soil under the grasses, except in treatment T2.5. Soil organic carbon was higher in the soil where C. dactylon was planted (36.86 to 46.45 g kg–1) than in soil under E. indica. N, P and cations did not significantly differ in soil under the grasses. It was concluded that E. indica has a higher crude oil pollutant remediating potential on soil than C. dactylon.

Key words: Cynodon dactylon, Eleusine indica, hydrocarbon, oil contamination, phytoremediation, soil properties.

 
Env Exp Biol (2013) 11: 145–150
 DOI: http://doi.org/10.22364/eeb
EEB

Editor-in-Chief
Prof. Gederts Ievinsh



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