alexa Residues Analysis of Organochlorine Pesticides in Fish,
ISSN: 2161-0525

Journal of Environmental & Analytical Toxicology
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Research Article

Residues Analysis of Organochlorine Pesticides in Fish, Sediment and Water Samples from Tekeze Dam, Tigray, Ethiopia

Teklit GA*
Department of Chemistry, College of Natural and Computational Science, Mekelle University, Mekelle, Ethiopia
Corresponding Author : Teklit GA
Department of Chemistry College of Natural and
Computational Science Mekelle University, Mekelle, Ethiopia
Tel: +251344407608
E-mail: teklitgeb@
Received November 30, 2015; Accepted December 28, 2015; Published January 02, 2016
Citation: Teklit GA (2016) Residues Analysis of Organochlorine Pesticides in Fish, Sediment and Water Samples from Tekeze Dam, Tigray, Ethiopia. J Environ Anal Toxicol 6:342. doi:10.4172/2161- 0525.1000342
Copyright: © 2016 Teklit GA. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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The study was conducted to assess the levels of organochlorine (OC) pesticide residues in Lake TeKeze dam have been investigated using water, sediment and fish (Labeobarbusspp, Clariasgariepinus and Oreochromis niloticus) samples as a case study to find out the extent of pesticide contamination and accumulation in the lake. Six OC pesticides namely DDT, DDE, Lindane, Endosulfan, Heptachlor and Chlordane were analyzed in four sites at two seasons. Water samples were processed using a liquid-liquid extraction technique and gas chromatograph equipped with electron capture detector (GC-ECD). Soxhlet extraction was used for fish and sediment samples followed by clean up and gas chromatograph. DDE was the predominant residue in all the samples analyzed, at the mean concentrations of 0.052 ppb, 9.80 ppb and 4.81 ppb in water, sediment and fish samples, respectively. The lowest levels of OC pesticides were related to Heptachlor and Chlordane which none of them were found in water samples. It also indicated the extensive presence and usage of these pesticides in the study environment, which include recent use of this pesticide for agricultural purposes. Thus, the use of these pesticides to control pest by farmers within the study area with little or no knowledge must be checked through adequate control of the trade and use of pesticides and the enforcement of appropriate sanctions.


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