The organomanganese compound MMT (methylcyclopentadienyl manganese tricarbonyl). an antiknock additive in unleaded gasoline, has been used in Canada since 1976.
Indeed, Canada is the only country where MMT is almost exclusively used.
In October 1995, by court decision the Environmental protection Agency (EPA) granted Ethyl's waiver for the use of MMT in the United States.
Paradoxically, in 1997 the federal government of Canada adopted a law (C-29) that banned both the interprovincial trade and the importation for commercial purposes of manganese-based substances, including MMT.
However, MMT is currently widely used in Canada because of substantial stockpiling, and six Canadian provinces are challenging the law in the courts.
Moreover, MMT has been approved for use in Argentina.
Russia, and conditionally, in New Zealand.
It has been suggested by some scientists that combustion of MMT may be a significant source of exposure to inorganic Mn in urban areas.
The crucial question is whether Mn contamination from industrial sources combined with the additional contamination that would result from the widespread use of MMT would lead to toxic effects.
Our research efforts have attempted to assess the environmental/ecosystem Mn contamination arising from the combustion of MMT in abiotic and biotic systems as well as human exposure. (...)
Mots-clés Pascal : Exposition, Environnement, Manganèse, Homme, Manganèse composé, Essence sans plomb, Additif, Canada, Amérique du Nord, Amérique, Pollution air, Teneur air ambiant, Facteur risque
Mots-clés Pascal anglais : Exposure, Environment, Manganese, Human, Manganese compound, Unleaded gasoline, Additive, Canada, North America, America, Air pollution, Ambient air concentration, Risk factor
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0092252
Code Inist : 002B03L05. Création : 31/05/1999.