Abstract
During the last decades, Southeastern Tunisia has suffered from an industrial expansion leading to a serious pollution problem. In this work, heavy metal contamination near Gabes cement plant (Southeastern Tunisia) was assessed in the soils and statistically compared with a control site located 12 km away. Soil samples were collected from 5 to 15 cm below the surface layer. Concentrations of Cr, Mn, Co, Ni, Cu, Zn, Cd, Pb, and Fe and chemical parameters (conductivity, pH, CaCO3, OM) were measured. The variance analysis exhibited a significant difference (p < 0.05) in metal content between the two sites reflecting the cement plant contamination effect on the surrounding area. Eleven plant species widely distributed in the study area were collected together with the soil in which they were rooted, to assess their phytoextraction potential. Principal component analysis (PCA) was applied to understand the complex connection between soil, plants, and heavy metal contents. Lygeum spartum with respective total bioaccumulation factor (MBF = 1.48 ˃ 1 and Echiochilon fruticosum with a total translocation factor (MTF = 7.06) ˃ 1 were revealed as pertinent candidates for phytoremediation applications.
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