Bioaccumulation de certains éléments métalliques dans les produits maraîchers cultivés sur les sols urbains le long de l'autoroute Lomé- Aného, Sud Togo

Abstract

Several metallic elements were analyzed by ICP—AES in 10 vegetable species cultivated in market—gardening agriculture in Lomé and its suburban, along the highway Lomé-Aného, Togo. The results showed a high accumulation of these metallic elements both in the vegetables and in the soils. Leaf vegetables accumulated higher concentration of these metallic elements than bulb or tuber vegetables. These metals could result from the air pollution due to the intense industrial activity and the high road traffic in this site and from chemical fertilizers and pesticides used by the market-gardeners. This survey stated that the metallic elements from air, could accumulate in the legumes by foliar absorption. Furthermore, this study especially pointed out that legumes cultivated in this area could be improper for human consumption. © 2008, Taylor & Francis Group, LLC.