Assessment of trace metal contamination in mangrove ecosystems from Senegal, West Africa

► Trace metals were analysed in sediment and harvested molluscs from African mangroves. ► A geochemical normalisation allowed for discrimination of contamination among sites. ► Metal bioaccumulation strongly according to sampling site, metal and mollusc species. ► Concerns about Cd contamination of edible shellfish from Senegal were revealed.