Environmental and occupational exposure to manganese: a multimedia assessment

摘要: Methylcyclopentadienyl manganese tricarbonyl (MMT) is an organic additive used in Canada since 1976 as anti-knock agent unleaded gasoline. Its combustion leads to the emission of Mn oxides, especially Mn3O4. Since no study has assessed potential risk chronic exposure low concentrations resulting from these emissions, present investigation was undertaken assess level environmental and occupational human population. The multimedia two groups workers (garage mechanics blue-collar workers) potentially exposed different levels MMT using personal air samplers, a dietary compilation, water samples at their places residence, epidemiological questionnaire blood hair samples. Results show that garage were on average higher atmospheric work (0.42 µg/m3) than (0.04 µg/m3). However, contribution total absorbed dose less 1%, well below standards estabished for or exposure; food contributes more 95% dose. whole similar (0.67–0.76 µg/100 ml) fall within normal adult range. significantly (0.66 µg/g) (0.39 µg/g). exogenous versus endogenous questioned. As judged by governmental criteria non-occupational environments, current food, may not cause any problems workers.