Étude du transfert du Polonium 210 et du Plomb total du sol traité à l’herbicide aux vivriers

Résumé

Study of the transfer of Polonium-210 and total Lead from soil treated with herbicide to food crops

The objective of this study is to evaluate the possibility of transfer from the soil to the plants of the residues of chemical elements contained in the formulations of herbicides. This study focused on Polonium 210 (²¹⁰Po) for its radiotoxicity and total lead (Pb) for its toxicity to living beings. These elements were determined in the organs of cassava (Manihot esculenta) and peanut (Arachis hypogaea) plants by isotopic and spectrometric methods, respectively. The highest levels are measured in the leaves of food crops: cassava leaves (81±5 Bq/kg; 34.0±0.1 μg/kg DW) and peanut leaves (31±3Bq/kg; 178.0±0.1 μg/kg DW). The transfer factors of ²¹⁰Po and Pb are 0.336 (cassava leaves) and 0.118 (peanut leaves), respectively.

Keywords: Food crops; Herbicides; Isotopic; Total lead; Polonium 210; Spectrometry.