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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 Organochlorine Pesticides Sediments Water |
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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