Survey of heavy metal concentration in the muscle of common carp (Cyprinus carpio ) from Hamoun international wetland after twenty years of drought

It is crucial to investigate the amount of metals in the muscle tissue of common carp (Cyprinus carpio) because of their high consumption in Sistan region, from Hamoun international wetland in wet years. Therefore, in the present study, C. carpio was captured from Hamoun Pouzak, Hirmand and Sabouri and prepared through acid digestion method and the concentration of heavy metals was measured using ICP. Statistical analysis showed the significant difference among three lakes in which Sabouri lake had the highest metal concentration (P<0.05). Also, the accumulation patterns of metals in the muscle tissue were Zn>Fe>Cu>Mn>Cr>Ni>Pb>Cd. The amount of Ni, Cr and Mn were higher than the WHO and FAO guidelines. The maximum amounts of THQ for Cd in infants and adults were 2.458 and 0.097, respectively. In addition, the HI measured in adults was <1 and showed no health risk in 227g consumption rate. While, it’s calculated with an amount of 6.08 in infants. In conclusion, the consumption of C. carpio may cause health effects in infants, especially for Cd.