Research Article: Assessment of heavy metal bioaccumulation in the muscle tissue of Caspian kutum (Rutilus frisii kutum) from the Siah Darvishan River, Guilan Province, Iran

In this study, the bioaccumulation of eleven metals (As, Fe, Hg, Zn, Pb, Se, Cd, Cr, Cu, Mn, and Ni) in the muscle tissue of ۲۵ Caspian kutum (Rutilus frisii kutum) collected from the Siah Darvishan River, Guilan Province, Iran, during the summer of ۲۰۱۶ was investigated using varian atomic absorption spectroscopy. The mean concentrations of the metals (µg g⁻¹ d.w.) ranged as follows: Zn (۳۴.۸۷–۳۶.۱۲), Fe (۲۹.۱۵–۳۳.۳۴), Cu (۷.۵۷–۸.۸۴), Mn (۱.۸۹–۲.۲۳), As (۰.۸۰–۰.۸۷), Pb (۰.۷۳–۰.۸۸), Se (۰.۶۸–۰.۸۰), Cd (۰.۲۵–۰.۲۸), Ni (۰.۲۷–۰.۳۲), Cr (۰.۱۵–۰.۱۶), and Hg (۰.۰۸–۰.۰۹). According to the results, the mean concentrations of all elements in the muscle tissue of Caspian kutum were below the threshold limits recommended by FAO/WHO international standards, except for Mn (۲.۰۴۵±۰.۱۶۹), As (۰.۸۴۰±۰.۰۳۸), Pb (۰.۸۰۵±۰.۰۷۷), and Cd (۰.۲۶۵±۰.۰۱۱). Overall, the results indicate that the consumption of Caspian kutum from the Siah Darvishan River does not pose a significant health risk to consumers. Nevertheless, continuous environmental monitoring and regular assessment of metal contamination are essential to ensure long-term ecosystem health and food safety.

کلیدواژه ها:

Environmental contamination ، Trace elements ، Toxic metals ، Metal pollution