A component enrichment factor (EF) was initially devel- oped to speculate on the origin of elements in the atmosphere, precipitation, or seawater (Duce et al., 1975), but it was pro- gressively extended to the study of soils, lake sediments, peat, tailings, and other environmental materials (Qingjie and Jun, 2008; Reimann and de Caritat, 2005). The enrichment factor (EF) is a convenient measure of geochemical trends and is used for making comparisons among areas. To evaluate the magni- tude of contamination in the environment, the enrichment fac- tors (EF) were computed relatively to the abundance of species in source material and to that found in the Earth’s crust (Sinex and Helz 1981).