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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/12436

Title: Persistent organochlorine pesticide residues in fish, sediments and water from Lake Bosomtwi, Ghana
Authors: Darko, Godfred
Akoto, Osei
Oppong, Caleb
Keywords: Fish
Gas chromatography
Issue Date: 1-May-2008
Publisher: Elsevier Ltd.
Citation: doi:10.1016/j.chemosphere.2008.02.052., G. Darko et al. / Chemosphere 72 (2008) 21–24
Abstract: Some organochlorine pesticide residues in tilapia fish (Tilapia zilli), sediment and water samples from Lake Bosomtwi (the largest natural lake in Ghana) were determined to find out the extent of pesticide contamination and accumulation in the lake. The extracted residues were analyzed on a micro-capillary gas chromatograph equipped with electron capture detector. DDE (p,p0-1,1-dichloro-2,2-bis-(4-chlorophenyl) ethylene) was the predominant residue in all the samples analyzed; detected in 82% of water samples, 98% of sediment samples and 58% of fish samples at concentrations of 0.061 ± 0.03 ng g 1, 8.342 ± 2.96 ng g 1 and 5.232 ± 1.30 ng g 1, respectively. DDT (p,p0-1,1,1-trichloro-2,2-bis-(4-chlorophenyl) ethane) was detected in 78% at a mean concentration 0.012 ± 0.62 ng g 1 of water samples analyzed. The mean concentrations of DDT in sediments and fish were 4.41 ± 1.54 ng g 1 and 3.645 ± 1.81 ng g 1, respectively. The detection of lower levels of DDT than its metabolite, DDE, in the samples implies that the presence of these contaminants in the lake is as result of past usage of the pesticides.
Description: An article published by Elsevier Ltd. and also available at doi:10.1016/j.chemosphere.2008.02.052
URI: http://hdl.handle.net/123456789/12436
Appears in Collections:College of Science

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