Total hydrocarbon profile and trace metal level in sediments from the upper Bonny estuary in southern Nigeria
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Abstract
Sediment cores retrieved from shallow marginal areas at three stations in the New Calabar River Estuary in southern, Nigeria were evaluated for total hydrocarbon content and the level of trace metals between 2011 and 2012. Result of the core profiles of total hydrocarbon content ranged from 0.001 to 130.80 ppm. The observed profiles corresponded with severe environmental perturbations resulting from massive oil spills. The contamination levels of the respective metals varied and the range of mean values are presented in mg/kg along with variations at statistically significant level (P <0.05). In sediment, only Cr varied significantly (p < 0.05) within two years. The constant rate of supply model which was employed to establish the age and date of sediment displayed increase in bulk sediment accumulation over the past 80 years.
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Copyright © 2008 Department of Geology, Faculty of Science, Chulalongkorn University. Parts of an article can be photocopied or reproduced without prior written permission from the author(s), but due acknowledgments should be stated or cited accordingly.
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