*3.4.3 Lead uptake by plant*

Due to the ability of Pb to bind to organic matters in soil, the ability of plants to uptake Pb is limited [89]. This is confirmed by the result of Pb CF which wsere all below 1 except for the northern sample at 1 km from the mining site (**Figure 4**). This exception is warranted due to the high concentration of Pb recorded in the plant (**Table 11**) and soil (**Table 3**) at this site.

It can be concluded that *E. hypnoides* cannot be used for the phyto-extraction of Pb from the soil. According to Islam et al. [90], they reported that a plant can be used for the phyto-extraction if the plant species can bioaccumulate toxic metals in the soil.
