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E-ISSN: 2347-5129, P-ISSN: 2394-0506

International Journal of Fisheries and Aquatic Studies

2019, Vol. 7, Issue 1, Part C

Assessment of organochlorine pesticides (OCPs) contamination in relation to physico-chemical parameters in the Upper River Kuja Catchment, Kenya (East Africa)


Author(s): Nyaundi JK, Getabu AM, Kengara F, Onchieku J, Njiru M, Kinaro ZO, Babu JM, Sitoki LM, Nyamweya C and Osoro EM

Abstract: Concentrations of 17 organochlorine pesticides residues (alpha-HCH, beta-HCH, gamma-HCH, delta-HCH, Heptachlor, Aldrin, Endrin, Endosulfan I, Dieldrin, p,p’-DDT, Endosulfan II, p,p’-DDD, Endrin aldehyde, p,p’-DDE, Endosulfan sulfate, Heptachlor epoxide and Methoxychlor) were analysed in water and sediment from Upper River Kuja catchment, Kenya, between January-October 2015, using Gas-Chromatography (GC) with (GC-ECD) equipment. Nutrient levels and water quality parameters: pH (7.57±0.354), secchi disk (0.05±0.019), dissolved oxygen (DO) (6.96±0.897), temperature (25.39±2.201), conductivity (62.03±23.123) and hardness (26.39±6.063) contributed to significant variations in organochlorine pesticide residue levels observed. Statistical significance differences (p<0.05) between water quality parameters in the sampling stations occurred. Pesticide concentrations ranged within BDL – 0.263µgl-1, for Heptachlor, BDL – 0.506 µgl-1 Heptachlor epoxide, BDL – 0.506 Aldrin, BDL – 0.014 Dieldrin, p,p’-DDT, BDL – 0.644 p,p’-DDE, BDL – 0.176 p,p’-DDD, and BDL – 2.220 methoxychlor. Sediment pesticide residues were higher during rainy period. Results indicate persistent organic pollutants (POPs) exist in our environment, and recent use in sampled area. Increased aquatic monitoring is recommended to detect persistency and changes in target environment.

Pages: 172-179  |  405 Views  49 Downloads

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How to cite this article:
Nyaundi JK, Getabu AM, Kengara F, Onchieku J, Njiru M, Kinaro ZO, Babu JM, Sitoki LM, Nyamweya C, Osoro EM. Assessment of organochlorine pesticides (OCPs) contamination in relation to physico-chemical parameters in the Upper River Kuja Catchment, Kenya (East Africa). Int J Fish Aquat Stud 2019;7(1):172-179.
International Journal of Fisheries and Aquatic Studies