Bioaccumulation of different heavy metals and toxicity assessment using different indices in grape plants and soil around power generators in Erbil province.

Nowadays, determining the presence of heavy metals in foods is crucial for our health. This study investigated the potential health risks of different heavy metals in grape plant parts, including root, stem, leaf, and soil surrounding the local electrical power generators, which are sources of both air and heavy metal pollution used as polluted sites and the Choman region as control unpolluted sites in Erbil city. The bioaccumulation (BAF), translocation (TR), and toxicity tolerance factors (TTI) were calculated. Soil pollution was estimated based on contamination factor (CF), pollution load index (PLI) degree of contamination (C), potential ecological risk degree (E), and risk index (RI) in the studied sites. Health risks were also assessed through the determination of cancer risk (CR), hazard quotient (HQ), and hazard index (HI). Pb, Zn, Cu, Fe, and Ni have exceeded the maximum permissible value set by the FAO/WHO. Leaf area, total protein, and chlorophyll leaf contents are significantly lower, while the ascorbic acid is higher in polluted sites than the control site. It was observed that grapes are hyperaccumulators for both Pb and Hg, and BAF values were greater than 1. The PLI = 1.218 showed a deterioration of the polluted site quality. Strength E was observed for Ni (44.56) and Sb (59.82) from contaminated soils. Children's hazard risk index values were higher than those of adult inhabitants. The total carcinogenic risk (TCR) values were 0.000272437, 0.000384, 0.001168, and 0.001797 in grape leaf and soil, respectively, for unpolluted and polluted sites. In the current study, the carcinogenic exposure pathway from eating grapes is taken into consideration. The metals being examined were believed to potentially cause cancer, including As, Cd, Co, Cr, Hg, Ni, and Pb, according to the determination of CR values.