Abstract
Soils and different vegetable species in Costa de Caparica (Portugal) are subject to the intensive use of inorganic fertilizers and pesticides. Thus, the concentrations of As, Cu, Fe, Mn, Pb, and Zn were evaluated. Lettuce, spinach, and potatoes collected in station 9 cause reason for concern due to their high Pb concentrations close to 20μgg-1 which is probably related to an intensive use of copper and iron sulphate fertilizers. Additionally, the consumption of Portulaca oleracea collected in stations 3 and 4 must be avoided due to the high concentrations of Zn, and even Cu. The derived estimated daily intake (EDI) dose of Zn will be a risk to human consumption if P. oleracea was the single basis of a soup, although the addition of other ingredients might lower the tolerable upper intake (TUI) value of 39mg/day of P. oleracea, to admissible levels, i.e., not exceeding 25mg/day. Pumpkin collected in station 1 contained 44.1μgg-1 Cu and a TUI value of 9.8mg/day, when the recommendation must not exceed 5.0mg/day. In this context, it is strongly advised to not include this vegetable in household menus.
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