Lead and cadmium bioaccumulation in fowl eggs depending on different food concentrations

Abstract

Cadmium and lead bioaccumulation in eggs from four groups of laying hens was studied. The birds were fed on foods containing different quantities of cadmium and lead, exceeding the official technological standards for three of the groups. Bioaccumulation was studied using two criteria: coefficient of biological intake (CBI), which is the ratio between the concentration of the chemical element in a unit of dry biomass and its fodder concentration, and Klarck of concentration /Kc/ ‐ a dynamic value which includes both the fodder and water concentrations of the elements needed for acquiring a unit of biomass. For the high cadmium and lead concentrations, dissipation of the studied elements in the egg mass was established with lower values of both CBI and Kc.

Key Words:

• Bioaccumulation
• cadmium
• lead
• coefficient of biological intake
• klark of concentration
• bioproducts