CONCENTRATIONS AND POLLUTION ASSESSMENT INDICES OF HEAVY METALS IN CLAY SOILS OF ARA-EKITI AND KONO-

Between May and November 2020, clay soil samples were taken at a depth of 0-30cm from Ara-Ekiti and Kono-Boue communities in Southern Nigeria to assess the amounts of various heavy metals (Fe, Pb, Cu, Zn, Mn, Cd, Cr, and Ni). The heavy metal concentrations were measured using an Atomic Adsorption Spectrometer. In both localities, the levels of the examined heavy metals were lower than the DPR baseline value. The average heavy metal concentrations in Ara-Ekiti were Fe; 3094.736.29, Pb; 135.870.94, Cu; 17.790.14, Zn; 93.300.55, Mn; 418.510.81, Cd; 6.590.04, Cr; 69.100.83, and Ni; 76.950.11 mg/Kg, while in Kono-Boue they were Fe; 2048.9935.67, Pb; 195.400.52, Cu; Heavy metal levels were also higher in Kono-Boue clay soils than in Ara-Ekiti clay soils, according to the findings. Contamination factor (CF), pollution load index (PLI), contamination degree (CD), modified contamination degree (mCD), potential ecological risk coefficient (Eir), potential ecological risk index (RI), Geo-accumulation index (Igeo), and anthropogenicity were the pollution assessment indices used to evaluate the quality of the clay soil from Ara-Ekiti and Kono-Boue. The pollution indices findings suggested that heavy metals have contaminated or polluted the clay soils of the two Nigerian settlements. Despite the fact that the amounts measured were lower than the DPR acceptable limits, adequate monitoring of the clay products that emanate from these settlements is required to avoid heavy metals being transmitted to humans due to the harmful impact they have on human health.

Please see the link :- https://www.ikprress.org/index.php/JOGEE/article/view/6529