“…In the study by Barret et al, the contents of mercury, lead, copper, arsenic, barium, chromium, antimony, and vanadium were reported to be higher than the values obtained in the current research, while the levels of all the heavy metals in our study (except mercury) were higher than the values reported by the mentioned authors [2,10,11]. In addition, the levels of lead, manganese, zinc, nickel, iron, copper, and chromium were observed to be lower in the current research compared with the values reported in previous studies [15,31]. On the other hand, the cadmium content of the Ni-Cd battery (i.e., C.F.L.)…”