Rose Alani,
University of Lagos, Nigeria
Title: Assessment of organochlorine pesticides in Ogun River and abattoir meat products from Kara abattoir, near Berger, Lagos, Nigeria
Biography
Biography: Rose Alani,
Abstract
Our previous study on Ogun River at Kara abattoir revealed high concentration of gamma hexachlorocyclohexane (HCH) also called lindane, in water and sediment of the river. The use of this river as drinking water for the animals, coupled with the serious short and long-term health effects of lindane prompted this research. In the present study, water and sediment samples were taken from twenty locations in Ogun River and assessed for physico-chemical parameters and seventeen organochlorine pesticides (OCs) which include α-HCH, β-HCH, γ-HCH, δ-HCH, endrin, endrin aldehyde, endrin, heptachlor, heptachlor epoxide, aldrin, dieldrin, endosulfan 1, endosulfan 11, endosulfan sulphate, methoxychlor, α-chlordane, γ-chlordane, DDE, and DDT. Crabs and fish samples from the river were also assessed. Meat parts including beef, blood, heart, kidney, lung, liver, skin, tongue, milk, large intestine, small intestine and urine were also taken from three bulls and three cows; one male goat and one female goat; one ram and one ewe; and their feeds, were assessed for the OCs using gas chromatography/electron capture detector (GC/ECD). Most of the physico-chemical parameters were within WHO limits, except chemical oxygen demand (COD), dissolved oxygen (DO) and biochemical oxygen demand (BOD) at some locations. Generally, OCs was higher in the sediments than in the water, meat parts, animal feeds, fish and crabs. γ-HCH, DDT, aldrin, endrin, dieldrin, and endosulfan all exceeded the Canadian water quality guidelines (CWQG) where present. Dieldrin (12.33 ug/Kg) exceeded the Canadian interim sediment quality guideline (ISQGs) of 2.58 ug/Kg while endosulfan sulfate (2.047-42.748 ug/Kg), endosulfan II (3.54- 154.37 ug/Kg), endrin aldehyde (5.98-13.53 ug/Kg) and methoxychlor (1.71-2.86 ug/Kg) were quite high. OCs in other samples was below WHO maximum residue level (MRL). The male animals had more OCs than their females. Sum of OCs were highest in tongues, large intestines, liver, heart, with one bull blood sample having the highest sum concentration of 21.16 ug/Kg.