It is well known that the speciation of TE in soils depends on the
soil's characteristics such as pH, redox potential, CEC or organic matter
content and quality (Park et al., 2011; Unamuno et al., 2009; Zeng
et al., 2011). Thus, we hypothesized that beside total or “available” TE
contents in soils, as determined by chemical extraction methods, the
accumulation of TE in plants and snails could be partly correlated to
some soil parameters.Moreover,because snails are mostly herbivorous,
we postulated that TE accumulation in viscera could be closely linked to
plant contamination.