Technological development this century has led to an environmental input of synthetic chemical compounds totally extraneous to natural ecosystems. Polychlorobiphenyls (PCBs), extensively used in agriculture and industry, belong to this class of compounds. These xenobiotics have a high fat/water repartition coefficient, making them easily accumulated by living organisms. Their persistence and low degradability means that they are now present throughout the global ecosystem. Ubiquitous environmental contaminants also include heavy metals like Hg, As, Pb, CA and Cr, of which CA, an element causing functional damage to the kidney and liver in which it preferentially aceumulates, is of special ecotoxicological importance. The WHO has defined an accumulation limit of 60 mg/kg (fresh weight), beyond which damage occurs. CA occurs "naturally" in high concentrations in certain animal species including molluscs. Birds and marine mammals feeding largely on cephalopods show high levels of this metal (Furness & Hutton 1979, Honda et al. 1983). Many monitoring studies have also revealed high concentrations of PCBs in the same animals (Renzoni et al. 1986, Tanabe et al. 1983).
Leonzio, C., Marsili, L., Focardi, S. (1992). Influence of cadmium on PCB congener accumulation in quail. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY, 49(5), 686-693 [10.1007/BF00200781].
Influence of cadmium on PCB congener accumulation in quail
LEONZIO, C.;MARSILI, L.;FOCARDI, S.
1992-01-01
Abstract
Technological development this century has led to an environmental input of synthetic chemical compounds totally extraneous to natural ecosystems. Polychlorobiphenyls (PCBs), extensively used in agriculture and industry, belong to this class of compounds. These xenobiotics have a high fat/water repartition coefficient, making them easily accumulated by living organisms. Their persistence and low degradability means that they are now present throughout the global ecosystem. Ubiquitous environmental contaminants also include heavy metals like Hg, As, Pb, CA and Cr, of which CA, an element causing functional damage to the kidney and liver in which it preferentially aceumulates, is of special ecotoxicological importance. The WHO has defined an accumulation limit of 60 mg/kg (fresh weight), beyond which damage occurs. CA occurs "naturally" in high concentrations in certain animal species including molluscs. Birds and marine mammals feeding largely on cephalopods show high levels of this metal (Furness & Hutton 1979, Honda et al. 1983). Many monitoring studies have also revealed high concentrations of PCBs in the same animals (Renzoni et al. 1986, Tanabe et al. 1983).File | Dimensione | Formato | |
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https://hdl.handle.net/11365/9807
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