Bioaccumulation of Organochlorine Pesticides (DDT, DDE, Heptachlor, and Aldrin) in Oysters (<i>Pinctada nested radiata) </i>from Soumbedioune Beach (Dakar/Senegal) by GC-MS/MS

Abstract

Socio-economic activities have led to the dispersion of polluting agents in all compartments of the environment. The latter largely reach the sea by air, water or land. Thus they can alter the balance of its ecosystems due to their harmful properties. In return, these physical, chic or biological entities can reach humans through the food chain. Hence knowledge of these contaminants is necessary. Indeed, in Senegal, there is little data relating to fishery products, particularly seafood. Hence such work could contribute to good food security but also would allow us to become better aware of the consequences of the destruction of our environment. In this work the profile of the contamination of Soumbedioune beach by OCPs was studied using gas chromatography coupled with mass spectrometry. The average values of 30,470; 149,983 µg/Kg respectively for heptachlor and aldrin are well above the reference 0.1 µg/Kg. And the values 4,255; 149,98 µg/Kg respectively for DDE and DD. This is greater than 50 µg/Kg for the last. This shows that there is a real environmental and health problem that exists on this Dakar coast. Faced with such a situation, it is appropriate to set up wastewater treatment plants and ensure compliance with the ban on these products dangerous to health. Consequently, awareness on the part of decision-makers, populations and industrialists could probably lead to solutions.